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Merge pull request #2357 from karalabe/abi-binding-generator

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accounts/abi/bind: Go ABI binding generator
This commit is contained in:
Péter Szilágyi 2016-03-24 17:35:42 +02:00
commit cfb3a8ea8f
25 changed files with 12850 additions and 61 deletions
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8
Godeps/Godeps.json generated
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@ -286,6 +286,14 @@
"ImportPath": "golang.org/x/text/transform",
"Rev": "09761194ac5034a97b2bfad4f5b896b0ac350b3e"
},
{
"ImportPath": "golang.org/x/tools/go/ast/astutil",
"Rev": "758728c4b28cfbac299730969ef8f655c4761283"
},
{
"ImportPath": "golang.org/x/tools/imports",
"Rev": "758728c4b28cfbac299730969ef8f655c4761283"
},
{
"ImportPath": "gopkg.in/check.v1",
"Rev": "4f90aeace3a26ad7021961c297b22c42160c7b25"

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Godeps/_workspace/src/golang.org/x/tools/LICENSE generated vendored Normal file
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Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
Godeps/_workspace/src/golang.org/x/tools/PATENTS generated vendored Normal file
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@ -0,0 +1,22 @@
Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

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Godeps/_workspace/src/golang.org/x/tools/go/ast/astutil/enclosing.go generated vendored Normal file
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package astutil
// This file defines utilities for working with source positions.
import (
"fmt"
"go/ast"
"go/token"
"sort"
)
// PathEnclosingInterval returns the node that encloses the source
// interval [start, end), and all its ancestors up to the AST root.
//
// The definition of "enclosing" used by this function considers
// additional whitespace abutting a node to be enclosed by it.
// In this example:
//
// z := x + y // add them
// <-A->
// <----B----->
//
// the ast.BinaryExpr(+) node is considered to enclose interval B
// even though its [Pos()..End()) is actually only interval A.
// This behaviour makes user interfaces more tolerant of imperfect
// input.
//
// This function treats tokens as nodes, though they are not included
// in the result. e.g. PathEnclosingInterval("+") returns the
// enclosing ast.BinaryExpr("x + y").
//
// If start==end, the 1-char interval following start is used instead.
//
// The 'exact' result is true if the interval contains only path[0]
// and perhaps some adjacent whitespace. It is false if the interval
// overlaps multiple children of path[0], or if it contains only
// interior whitespace of path[0].
// In this example:
//
// z := x + y // add them
// <--C--> <---E-->
// ^
// D
//
// intervals C, D and E are inexact. C is contained by the
// z-assignment statement, because it spans three of its children (:=,
// x, +). So too is the 1-char interval D, because it contains only
// interior whitespace of the assignment. E is considered interior
// whitespace of the BlockStmt containing the assignment.
//
// Precondition: [start, end) both lie within the same file as root.
// TODO(adonovan): return (nil, false) in this case and remove precond.
// Requires FileSet; see loader.tokenFileContainsPos.
//
// Postcondition: path is never nil; it always contains at least 'root'.
//
func PathEnclosingInterval(root *ast.File, start, end token.Pos) (path []ast.Node, exact bool) {
// fmt.Printf("EnclosingInterval %d %d\n", start, end) // debugging
// Precondition: node.[Pos..End) and adjoining whitespace contain [start, end).
var visit func(node ast.Node) bool
visit = func(node ast.Node) bool {
path = append(path, node)
nodePos := node.Pos()
nodeEnd := node.End()
// fmt.Printf("visit(%T, %d, %d)\n", node, nodePos, nodeEnd) // debugging
// Intersect [start, end) with interval of node.
if start < nodePos {
start = nodePos
}
if end > nodeEnd {
end = nodeEnd
}
// Find sole child that contains [start, end).
children := childrenOf(node)
l := len(children)
for i, child := range children {
// [childPos, childEnd) is unaugmented interval of child.
childPos := child.Pos()
childEnd := child.End()
// [augPos, augEnd) is whitespace-augmented interval of child.
augPos := childPos
augEnd := childEnd
if i > 0 {
augPos = children[i-1].End() // start of preceding whitespace
}
if i < l-1 {
nextChildPos := children[i+1].Pos()
// Does [start, end) lie between child and next child?
if start >= augEnd && end <= nextChildPos {
return false // inexact match
}
augEnd = nextChildPos // end of following whitespace
}
// fmt.Printf("\tchild %d: [%d..%d)\tcontains interval [%d..%d)?\n",
// i, augPos, augEnd, start, end) // debugging
// Does augmented child strictly contain [start, end)?
if augPos <= start && end <= augEnd {
_, isToken := child.(tokenNode)
return isToken || visit(child)
}
// Does [start, end) overlap multiple children?
// i.e. left-augmented child contains start
// but LR-augmented child does not contain end.
if start < childEnd && end > augEnd {
break
}
}
// No single child contained [start, end),
// so node is the result. Is it exact?
// (It's tempting to put this condition before the
// child loop, but it gives the wrong result in the
// case where a node (e.g. ExprStmt) and its sole
// child have equal intervals.)
if start == nodePos && end == nodeEnd {
return true // exact match
}
return false // inexact: overlaps multiple children
}
if start > end {
start, end = end, start
}
if start < root.End() && end > root.Pos() {
if start == end {
end = start + 1 // empty interval => interval of size 1
}
exact = visit(root)
// Reverse the path:
for i, l := 0, len(path); i < l/2; i++ {
path[i], path[l-1-i] = path[l-1-i], path[i]
}
} else {
// Selection lies within whitespace preceding the
// first (or following the last) declaration in the file.
// The result nonetheless always includes the ast.File.
path = append(path, root)
}
return
}
// tokenNode is a dummy implementation of ast.Node for a single token.
// They are used transiently by PathEnclosingInterval but never escape
// this package.
//
type tokenNode struct {
pos token.Pos
end token.Pos
}
func (n tokenNode) Pos() token.Pos {
return n.pos
}
func (n tokenNode) End() token.Pos {
return n.end
}
func tok(pos token.Pos, len int) ast.Node {
return tokenNode{pos, pos + token.Pos(len)}
}
// childrenOf returns the direct non-nil children of ast.Node n.
// It may include fake ast.Node implementations for bare tokens.
// it is not safe to call (e.g.) ast.Walk on such nodes.
//
func childrenOf(n ast.Node) []ast.Node {
var children []ast.Node
// First add nodes for all true subtrees.
ast.Inspect(n, func(node ast.Node) bool {
if node == n { // push n
return true // recur
}
if node != nil { // push child
children = append(children, node)
}
return false // no recursion
})
// Then add fake Nodes for bare tokens.
switch n := n.(type) {
case *ast.ArrayType:
children = append(children,
tok(n.Lbrack, len("[")),
tok(n.Elt.End(), len("]")))
case *ast.AssignStmt:
children = append(children,
tok(n.TokPos, len(n.Tok.String())))
case *ast.BasicLit:
children = append(children,
tok(n.ValuePos, len(n.Value)))
case *ast.BinaryExpr:
children = append(children, tok(n.OpPos, len(n.Op.String())))
case *ast.BlockStmt:
children = append(children,
tok(n.Lbrace, len("{")),
tok(n.Rbrace, len("}")))
case *ast.BranchStmt:
children = append(children,
tok(n.TokPos, len(n.Tok.String())))
case *ast.CallExpr:
children = append(children,
tok(n.Lparen, len("(")),
tok(n.Rparen, len(")")))
if n.Ellipsis != 0 {
children = append(children, tok(n.Ellipsis, len("...")))
}
case *ast.CaseClause:
if n.List == nil {
children = append(children,
tok(n.Case, len("default")))
} else {
children = append(children,
tok(n.Case, len("case")))
}
children = append(children, tok(n.Colon, len(":")))
case *ast.ChanType:
switch n.Dir {
case ast.RECV:
children = append(children, tok(n.Begin, len("<-chan")))
case ast.SEND:
children = append(children, tok(n.Begin, len("chan<-")))
case ast.RECV | ast.SEND:
children = append(children, tok(n.Begin, len("chan")))
}
case *ast.CommClause:
if n.Comm == nil {
children = append(children,
tok(n.Case, len("default")))
} else {
children = append(children,
tok(n.Case, len("case")))
}
children = append(children, tok(n.Colon, len(":")))
case *ast.Comment:
// nop
case *ast.CommentGroup:
// nop
case *ast.CompositeLit:
children = append(children,
tok(n.Lbrace, len("{")),
tok(n.Rbrace, len("{")))
case *ast.DeclStmt:
// nop
case *ast.DeferStmt:
children = append(children,
tok(n.Defer, len("defer")))
case *ast.Ellipsis:
children = append(children,
tok(n.Ellipsis, len("...")))
case *ast.EmptyStmt:
// nop
case *ast.ExprStmt:
// nop
case *ast.Field:
// TODO(adonovan): Field.{Doc,Comment,Tag}?
case *ast.FieldList:
children = append(children,
tok(n.Opening, len("(")),
tok(n.Closing, len(")")))
case *ast.File:
// TODO test: Doc
children = append(children,
tok(n.Package, len("package")))
case *ast.ForStmt:
children = append(children,
tok(n.For, len("for")))
case *ast.FuncDecl:
// TODO(adonovan): FuncDecl.Comment?
// Uniquely, FuncDecl breaks the invariant that
// preorder traversal yields tokens in lexical order:
// in fact, FuncDecl.Recv precedes FuncDecl.Type.Func.
//
// As a workaround, we inline the case for FuncType
// here and order things correctly.
//
children = nil // discard ast.Walk(FuncDecl) info subtrees
children = append(children, tok(n.Type.Func, len("func")))
if n.Recv != nil {
children = append(children, n.Recv)
}
children = append(children, n.Name)
if n.Type.Params != nil {
children = append(children, n.Type.Params)
}
if n.Type.Results != nil {
children = append(children, n.Type.Results)
}
if n.Body != nil {
children = append(children, n.Body)
}
case *ast.FuncLit:
// nop
case *ast.FuncType:
if n.Func != 0 {
children = append(children,
tok(n.Func, len("func")))
}
case *ast.GenDecl:
children = append(children,
tok(n.TokPos, len(n.Tok.String())))
if n.Lparen != 0 {
children = append(children,
tok(n.Lparen, len("(")),
tok(n.Rparen, len(")")))
}
case *ast.GoStmt:
children = append(children,
tok(n.Go, len("go")))
case *ast.Ident:
children = append(children,
tok(n.NamePos, len(n.Name)))
case *ast.IfStmt:
children = append(children,
tok(n.If, len("if")))
case *ast.ImportSpec:
// TODO(adonovan): ImportSpec.{Doc,EndPos}?
case *ast.IncDecStmt:
children = append(children,
tok(n.TokPos, len(n.Tok.String())))
case *ast.IndexExpr:
children = append(children,
tok(n.Lbrack, len("{")),
tok(n.Rbrack, len("}")))
case *ast.InterfaceType:
children = append(children,
tok(n.Interface, len("interface")))
case *ast.KeyValueExpr:
children = append(children,
tok(n.Colon, len(":")))
case *ast.LabeledStmt:
children = append(children,
tok(n.Colon, len(":")))
case *ast.MapType:
children = append(children,
tok(n.Map, len("map")))
case *ast.ParenExpr:
children = append(children,
tok(n.Lparen, len("(")),
tok(n.Rparen, len(")")))
case *ast.RangeStmt:
children = append(children,
tok(n.For, len("for")),
tok(n.TokPos, len(n.Tok.String())))
case *ast.ReturnStmt:
children = append(children,
tok(n.Return, len("return")))
case *ast.SelectStmt:
children = append(children,
tok(n.Select, len("select")))
case *ast.SelectorExpr:
// nop
case *ast.SendStmt:
children = append(children,
tok(n.Arrow, len("<-")))
case *ast.SliceExpr:
children = append(children,
tok(n.Lbrack, len("[")),
tok(n.Rbrack, len("]")))
case *ast.StarExpr:
children = append(children, tok(n.Star, len("*")))
case *ast.StructType:
children = append(children, tok(n.Struct, len("struct")))
case *ast.SwitchStmt:
children = append(children, tok(n.Switch, len("switch")))
case *ast.TypeAssertExpr:
children = append(children,
tok(n.Lparen-1, len(".")),
tok(n.Lparen, len("(")),
tok(n.Rparen, len(")")))
case *ast.TypeSpec:
// TODO(adonovan): TypeSpec.{Doc,Comment}?
case *ast.TypeSwitchStmt:
children = append(children, tok(n.Switch, len("switch")))
case *ast.UnaryExpr:
children = append(children, tok(n.OpPos, len(n.Op.String())))
case *ast.ValueSpec:
// TODO(adonovan): ValueSpec.{Doc,Comment}?
case *ast.BadDecl, *ast.BadExpr, *ast.BadStmt:
// nop
}
// TODO(adonovan): opt: merge the logic of ast.Inspect() into
// the switch above so we can make interleaved callbacks for
// both Nodes and Tokens in the right order and avoid the need
// to sort.
sort.Sort(byPos(children))
return children
}
type byPos []ast.Node
func (sl byPos) Len() int {
return len(sl)
}
func (sl byPos) Less(i, j int) bool {
return sl[i].Pos() < sl[j].Pos()
}
func (sl byPos) Swap(i, j int) {
sl[i], sl[j] = sl[j], sl[i]
}
// NodeDescription returns a description of the concrete type of n suitable
// for a user interface.
//
// TODO(adonovan): in some cases (e.g. Field, FieldList, Ident,
// StarExpr) we could be much more specific given the path to the AST
// root. Perhaps we should do that.
//
func NodeDescription(n ast.Node) string {
switch n := n.(type) {
case *ast.ArrayType:
return "array type"
case *ast.AssignStmt:
return "assignment"
case *ast.BadDecl:
return "bad declaration"
case *ast.BadExpr:
return "bad expression"
case *ast.BadStmt:
return "bad statement"
case *ast.BasicLit:
return "basic literal"
case *ast.BinaryExpr:
return fmt.Sprintf("binary %s operation", n.Op)
case *ast.BlockStmt:
return "block"
case *ast.BranchStmt:
switch n.Tok {
case token.BREAK:
return "break statement"
case token.CONTINUE:
return "continue statement"
case token.GOTO:
return "goto statement"
case token.FALLTHROUGH:
return "fall-through statement"
}
case *ast.CallExpr:
return "function call (or conversion)"
case *ast.CaseClause:
return "case clause"
case *ast.ChanType:
return "channel type"
case *ast.CommClause:
return "communication clause"
case *ast.Comment:
return "comment"
case *ast.CommentGroup:
return "comment group"
case *ast.CompositeLit:
return "composite literal"
case *ast.DeclStmt:
return NodeDescription(n.Decl) + " statement"
case *ast.DeferStmt:
return "defer statement"
case *ast.Ellipsis:
return "ellipsis"
case *ast.EmptyStmt:
return "empty statement"
case *ast.ExprStmt:
return "expression statement"
case *ast.Field:
// Can be any of these:
// struct {x, y int} -- struct field(s)
// struct {T} -- anon struct field
// interface {I} -- interface embedding
// interface {f()} -- interface method
// func (A) func(B) C -- receiver, param(s), result(s)
return "field/method/parameter"
case *ast.FieldList:
return "field/method/parameter list"
case *ast.File:
return "source file"
case *ast.ForStmt:
return "for loop"
case *ast.FuncDecl:
return "function declaration"
case *ast.FuncLit:
return "function literal"
case *ast.FuncType:
return "function type"
case *ast.GenDecl:
switch n.Tok {
case token.IMPORT:
return "import declaration"
case token.CONST:
return "constant declaration"
case token.TYPE:
return "type declaration"
case token.VAR:
return "variable declaration"
}
case *ast.GoStmt:
return "go statement"
case *ast.Ident:
return "identifier"
case *ast.IfStmt:
return "if statement"
case *ast.ImportSpec:
return "import specification"
case *ast.IncDecStmt:
if n.Tok == token.INC {
return "increment statement"
}
return "decrement statement"
case *ast.IndexExpr:
return "index expression"
case *ast.InterfaceType:
return "interface type"
case *ast.KeyValueExpr:
return "key/value association"
case *ast.LabeledStmt:
return "statement label"
case *ast.MapType:
return "map type"
case *ast.Package:
return "package"
case *ast.ParenExpr:
return "parenthesized " + NodeDescription(n.X)
case *ast.RangeStmt:
return "range loop"
case *ast.ReturnStmt:
return "return statement"
case *ast.SelectStmt:
return "select statement"
case *ast.SelectorExpr:
return "selector"
case *ast.SendStmt:
return "channel send"
case *ast.SliceExpr:
return "slice expression"
case *ast.StarExpr:
return "*-operation" // load/store expr or pointer type
case *ast.StructType:
return "struct type"
case *ast.SwitchStmt:
return "switch statement"
case *ast.TypeAssertExpr:
return "type assertion"
case *ast.TypeSpec:
return "type specification"
case *ast.TypeSwitchStmt:
return "type switch"
case *ast.UnaryExpr:
return fmt.Sprintf("unary %s operation", n.Op)
case *ast.ValueSpec:
return "value specification"
}
panic(fmt.Sprintf("unexpected node type: %T", n))
}

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package astutil contains common utilities for working with the Go AST.
package astutil
import (
"fmt"
"go/ast"
"go/token"
"strconv"
"strings"
)
// AddImport adds the import path to the file f, if absent.
func AddImport(fset *token.FileSet, f *ast.File, ipath string) (added bool) {
return AddNamedImport(fset, f, "", ipath)
}
// AddNamedImport adds the import path to the file f, if absent.
// If name is not empty, it is used to rename the import.
//
// For example, calling
// AddNamedImport(fset, f, "pathpkg", "path")
// adds
// import pathpkg "path"
func AddNamedImport(fset *token.FileSet, f *ast.File, name, ipath string) (added bool) {
if imports(f, ipath) {
return false
}
newImport := &ast.ImportSpec{
Path: &ast.BasicLit{
Kind: token.STRING,
Value: strconv.Quote(ipath),
},
}
if name != "" {
newImport.Name = &ast.Ident{Name: name}
}
// Find an import decl to add to.
// The goal is to find an existing import
// whose import path has the longest shared
// prefix with ipath.
var (
bestMatch = -1 // length of longest shared prefix
lastImport = -1 // index in f.Decls of the file's final import decl
impDecl *ast.GenDecl // import decl containing the best match
impIndex = -1 // spec index in impDecl containing the best match
)
for i, decl := range f.Decls {
gen, ok := decl.(*ast.GenDecl)
if ok && gen.Tok == token.IMPORT {
lastImport = i
// Do not add to import "C", to avoid disrupting the
// association with its doc comment, breaking cgo.
if declImports(gen, "C") {
continue
}
// Match an empty import decl if that's all that is available.
if len(gen.Specs) == 0 && bestMatch == -1 {
impDecl = gen
}
// Compute longest shared prefix with imports in this group.
for j, spec := range gen.Specs {
impspec := spec.(*ast.ImportSpec)
n := matchLen(importPath(impspec), ipath)
if n > bestMatch {
bestMatch = n
impDecl = gen
impIndex = j
}
}
}
}
// If no import decl found, add one after the last import.
if impDecl == nil {
impDecl = &ast.GenDecl{
Tok: token.IMPORT,
}
if lastImport >= 0 {
impDecl.TokPos = f.Decls[lastImport].End()
} else {
// There are no existing imports.
// Our new import goes after the package declaration and after
// the comment, if any, that starts on the same line as the
// package declaration.
impDecl.TokPos = f.Package
file := fset.File(f.Package)
pkgLine := file.Line(f.Package)
for _, c := range f.Comments {
if file.Line(c.Pos()) > pkgLine {
break
}
impDecl.TokPos = c.End()
}
}
f.Decls = append(f.Decls, nil)
copy(f.Decls[lastImport+2:], f.Decls[lastImport+1:])
f.Decls[lastImport+1] = impDecl
}
// Insert new import at insertAt.
insertAt := 0
if impIndex >= 0 {
// insert after the found import
insertAt = impIndex + 1
}
impDecl.Specs = append(impDecl.Specs, nil)
copy(impDecl.Specs[insertAt+1:], impDecl.Specs[insertAt:])
impDecl.Specs[insertAt] = newImport
pos := impDecl.Pos()
if insertAt > 0 {
// If there is a comment after an existing import, preserve the comment
// position by adding the new import after the comment.
if spec, ok := impDecl.Specs[insertAt-1].(*ast.ImportSpec); ok && spec.Comment != nil {
pos = spec.Comment.End()
} else {
// Assign same position as the previous import,
// so that the sorter sees it as being in the same block.
pos = impDecl.Specs[insertAt-1].Pos()
}
}
if newImport.Name != nil {
newImport.Name.NamePos = pos
}
newImport.Path.ValuePos = pos
newImport.EndPos = pos
// Clean up parens. impDecl contains at least one spec.
if len(impDecl.Specs) == 1 {
// Remove unneeded parens.
impDecl.Lparen = token.NoPos
} else if !impDecl.Lparen.IsValid() {
// impDecl needs parens added.
impDecl.Lparen = impDecl.Specs[0].Pos()
}
f.Imports = append(f.Imports, newImport)
return true
}
// DeleteImport deletes the import path from the file f, if present.
func DeleteImport(fset *token.FileSet, f *ast.File, path string) (deleted bool) {
return DeleteNamedImport(fset, f, "", path)
}
// DeleteNamedImport deletes the import with the given name and path from the file f, if present.
func DeleteNamedImport(fset *token.FileSet, f *ast.File, name, path string) (deleted bool) {
var delspecs []*ast.ImportSpec
// Find the import nodes that import path, if any.
for i := 0; i < len(f.Decls); i++ {
decl := f.Decls[i]
gen, ok := decl.(*ast.GenDecl)
if !ok || gen.Tok != token.IMPORT {
continue
}
for j := 0; j < len(gen.Specs); j++ {
spec := gen.Specs[j]
impspec := spec.(*ast.ImportSpec)
if impspec.Name == nil && name != "" {
continue
}
if impspec.Name != nil && impspec.Name.Name != name {
continue
}
if importPath(impspec) != path {
continue
}
// We found an import spec that imports path.
// Delete it.
delspecs = append(delspecs, impspec)
deleted = true
copy(gen.Specs[j:], gen.Specs[j+1:])
gen.Specs = gen.Specs[:len(gen.Specs)-1]
// If this was the last import spec in this decl,
// delete the decl, too.
if len(gen.Specs) == 0 {
copy(f.Decls[i:], f.Decls[i+1:])
f.Decls = f.Decls[:len(f.Decls)-1]
i--
break
} else if len(gen.Specs) == 1 {
gen.Lparen = token.NoPos // drop parens
}
if j > 0 {
lastImpspec := gen.Specs[j-1].(*ast.ImportSpec)
lastLine := fset.Position(lastImpspec.Path.ValuePos).Line
line := fset.Position(impspec.Path.ValuePos).Line
// We deleted an entry but now there may be
// a blank line-sized hole where the import was.
if line-lastLine > 1 {
// There was a blank line immediately preceding the deleted import,
// so there's no need to close the hole.
// Do nothing.
} else {
// There was no blank line. Close the hole.
fset.File(gen.Rparen).MergeLine(line)
}
}
j--
}
}
// Delete them from f.Imports.
for i := 0; i < len(f.Imports); i++ {
imp := f.Imports[i]
for j, del := range delspecs {
if imp == del {
copy(f.Imports[i:], f.Imports[i+1:])
f.Imports = f.Imports[:len(f.Imports)-1]
copy(delspecs[j:], delspecs[j+1:])
delspecs = delspecs[:len(delspecs)-1]
i--
break
}
}
}
if len(delspecs) > 0 {
panic(fmt.Sprintf("deleted specs from Decls but not Imports: %v", delspecs))
}
return
}
// RewriteImport rewrites any import of path oldPath to path newPath.
func RewriteImport(fset *token.FileSet, f *ast.File, oldPath, newPath string) (rewrote bool) {
for _, imp := range f.Imports {
if importPath(imp) == oldPath {
rewrote = true
// record old End, because the default is to compute
// it using the length of imp.Path.Value.
imp.EndPos = imp.End()
imp.Path.Value = strconv.Quote(newPath)
}
}
return
}
// UsesImport reports whether a given import is used.
func UsesImport(f *ast.File, path string) (used bool) {
spec := importSpec(f, path)
if spec == nil {
return
}
name := spec.Name.String()
switch name {
case "<nil>":
// If the package name is not explicitly specified,
// make an educated guess. This is not guaranteed to be correct.
lastSlash := strings.LastIndex(path, "/")
if lastSlash == -1 {
name = path
} else {
name = path[lastSlash+1:]
}
case "_", ".":
// Not sure if this import is used - err on the side of caution.
return true
}
ast.Walk(visitFn(func(n ast.Node) {
sel, ok := n.(*ast.SelectorExpr)
if ok && isTopName(sel.X, name) {
used = true
}
}), f)
return
}
type visitFn func(node ast.Node)
func (fn visitFn) Visit(node ast.Node) ast.Visitor {
fn(node)
return fn
}
// imports returns true if f imports path.
func imports(f *ast.File, path string) bool {
return importSpec(f, path) != nil
}
// importSpec returns the import spec if f imports path,
// or nil otherwise.
func importSpec(f *ast.File, path string) *ast.ImportSpec {
for _, s := range f.Imports {
if importPath(s) == path {
return s
}
}
return nil
}
// importPath returns the unquoted import path of s,
// or "" if the path is not properly quoted.
func importPath(s *ast.ImportSpec) string {
t, err := strconv.Unquote(s.Path.Value)
if err == nil {
return t
}
return ""
}
// declImports reports whether gen contains an import of path.
func declImports(gen *ast.GenDecl, path string) bool {
if gen.Tok != token.IMPORT {
return false
}
for _, spec := range gen.Specs {
impspec := spec.(*ast.ImportSpec)
if importPath(impspec) == path {
return true
}
}
return false
}
// matchLen returns the length of the longest path segment prefix shared by x and y.
func matchLen(x, y string) int {
n := 0
for i := 0; i < len(x) && i < len(y) && x[i] == y[i]; i++ {
if x[i] == '/' {
n++
}
}
return n
}
// isTopName returns true if n is a top-level unresolved identifier with the given name.
func isTopName(n ast.Expr, name string) bool {
id, ok := n.(*ast.Ident)
return ok && id.Name == name && id.Obj == nil
}
// Imports returns the file imports grouped by paragraph.
func Imports(fset *token.FileSet, f *ast.File) [][]*ast.ImportSpec {
var groups [][]*ast.ImportSpec
for _, decl := range f.Decls {
genDecl, ok := decl.(*ast.GenDecl)
if !ok || genDecl.Tok != token.IMPORT {
break
}
group := []*ast.ImportSpec{}
var lastLine int
for _, spec := range genDecl.Specs {
importSpec := spec.(*ast.ImportSpec)
pos := importSpec.Path.ValuePos
line := fset.Position(pos).Line
if lastLine > 0 && pos > 0 && line-lastLine > 1 {
groups = append(groups, group)
group = []*ast.ImportSpec{}
}
group = append(group, importSpec)
lastLine = line
}
groups = append(groups, group)
}
return groups
}

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package astutil
import "go/ast"
// Unparen returns e with any enclosing parentheses stripped.
func Unparen(e ast.Expr) ast.Expr {
for {
p, ok := e.(*ast.ParenExpr)
if !ok {
return e
}
e = p.X
}
}

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package imports
import (
"fmt"
"go/ast"
"go/build"
"go/parser"
"go/token"
"os"
"path"
"path/filepath"
"strings"
"sync"
"golang.org/x/tools/go/ast/astutil"
)
// importToGroup is a list of functions which map from an import path to
// a group number.
var importToGroup = []func(importPath string) (num int, ok bool){
func(importPath string) (num int, ok bool) {
if strings.HasPrefix(importPath, "appengine") {
return 2, true
}
return
},
func(importPath string) (num int, ok bool) {
if strings.Contains(importPath, ".") {
return 1, true
}
return
},
}
func importGroup(importPath string) int {
for _, fn := range importToGroup {
if n, ok := fn(importPath); ok {
return n
}
}
return 0
}
func fixImports(fset *token.FileSet, f *ast.File, filename string) (added []string, err error) {
// refs are a set of possible package references currently unsatisfied by imports.
// first key: either base package (e.g. "fmt") or renamed package
// second key: referenced package symbol (e.g. "Println")
refs := make(map[string]map[string]bool)
// decls are the current package imports. key is base package or renamed package.
decls := make(map[string]*ast.ImportSpec)
// collect potential uses of packages.
var visitor visitFn
visitor = visitFn(func(node ast.Node) ast.Visitor {
if node == nil {
return visitor
}
switch v := node.(type) {
case *ast.ImportSpec:
if v.Name != nil {
decls[v.Name.Name] = v
} else {
local := importPathToName(strings.Trim(v.Path.Value, `\"`))
decls[local] = v
}
case *ast.SelectorExpr:
xident, ok := v.X.(*ast.Ident)
if !ok {
break
}
if xident.Obj != nil {
// if the parser can resolve it, it's not a package ref
break
}
pkgName := xident.Name
if refs[pkgName] == nil {
refs[pkgName] = make(map[string]bool)
}
if decls[pkgName] == nil {
refs[pkgName][v.Sel.Name] = true
}
}
return visitor
})
ast.Walk(visitor, f)
// Nil out any unused ImportSpecs, to be removed in following passes
unusedImport := map[string]string{}
for pkg, is := range decls {
if refs[pkg] == nil && pkg != "_" && pkg != "." {
name := ""
if is.Name != nil {
name = is.Name.Name
}
unusedImport[strings.Trim(is.Path.Value, `"`)] = name
}
}
for ipath, name := range unusedImport {
if ipath == "C" {
// Don't remove cgo stuff.
continue
}
astutil.DeleteNamedImport(fset, f, name, ipath)
}
// Search for imports matching potential package references.
searches := 0
type result struct {
ipath string
name string
err error
}
results := make(chan result)
for pkgName, symbols := range refs {
if len(symbols) == 0 {
continue // skip over packages already imported
}
go func(pkgName string, symbols map[string]bool) {
ipath, rename, err := findImport(pkgName, symbols, filename)
r := result{ipath: ipath, err: err}
if rename {
r.name = pkgName
}
results <- r
}(pkgName, symbols)
searches++
}
for i := 0; i < searches; i++ {
result := <-results
if result.err != nil {
return nil, result.err
}
if result.ipath != "" {
if result.name != "" {
astutil.AddNamedImport(fset, f, result.name, result.ipath)
} else {
astutil.AddImport(fset, f, result.ipath)
}
added = append(added, result.ipath)
}
}
return added, nil
}
// importPathToName returns the package name for the given import path.
var importPathToName = importPathToNameGoPath
// importPathToNameBasic assumes the package name is the base of import path.
func importPathToNameBasic(importPath string) (packageName string) {
return path.Base(importPath)
}
// importPathToNameGoPath finds out the actual package name, as declared in its .go files.
// If there's a problem, it falls back to using importPathToNameBasic.
func importPathToNameGoPath(importPath string) (packageName string) {
if buildPkg, err := build.Import(importPath, "", 0); err == nil {
return buildPkg.Name
} else {
return importPathToNameBasic(importPath)
}
}
type pkg struct {
importpath string // full pkg import path, e.g. "net/http"
dir string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt"
}
var pkgIndexOnce sync.Once
var pkgIndex struct {
sync.Mutex
m map[string][]pkg // shortname => []pkg, e.g "http" => "net/http"
}
// gate is a semaphore for limiting concurrency.
type gate chan struct{}
func (g gate) enter() { g <- struct{}{} }
func (g gate) leave() { <-g }
// fsgate protects the OS & filesystem from too much concurrency.
// Too much disk I/O -> too many threads -> swapping and bad scheduling.
var fsgate = make(gate, 8)
func loadPkgIndex() {
pkgIndex.Lock()
pkgIndex.m = make(map[string][]pkg)
pkgIndex.Unlock()
var wg sync.WaitGroup
for _, path := range build.Default.SrcDirs() {
fsgate.enter()
f, err := os.Open(path)
if err != nil {
fsgate.leave()
fmt.Fprint(os.Stderr, err)
continue
}
children, err := f.Readdir(-1)
f.Close()
fsgate.leave()
if err != nil {
fmt.Fprint(os.Stderr, err)
continue
}
for _, child := range children {
if child.IsDir() {
wg.Add(1)
go func(path, name string) {
defer wg.Done()
loadPkg(&wg, path, name)
}(path, child.Name())
}
}
}
wg.Wait()
}
func loadPkg(wg *sync.WaitGroup, root, pkgrelpath string) {
importpath := filepath.ToSlash(pkgrelpath)
dir := filepath.Join(root, importpath)
fsgate.enter()
defer fsgate.leave()
pkgDir, err := os.Open(dir)
if err != nil {
return
}
children, err := pkgDir.Readdir(-1)
pkgDir.Close()
if err != nil {
return
}
// hasGo tracks whether a directory actually appears to be a
// Go source code directory. If $GOPATH == $HOME, and
// $HOME/src has lots of other large non-Go projects in it,
// then the calls to importPathToName below can be expensive.
hasGo := false
for _, child := range children {
// Avoid .foo, _foo, and testdata directory trees.
name := child.Name()
if name == "" || name[0] == '.' || name[0] == '_' || name == "testdata" {
continue
}
if strings.HasSuffix(name, ".go") {
hasGo = true
}
if child.IsDir() {
wg.Add(1)
go func(root, name string) {
defer wg.Done()
loadPkg(wg, root, name)
}(root, filepath.Join(importpath, name))
}
}
if hasGo {
shortName := importPathToName(importpath)
pkgIndex.Lock()
pkgIndex.m[shortName] = append(pkgIndex.m[shortName], pkg{
importpath: importpath,
dir: dir,
})
pkgIndex.Unlock()
}
}
// loadExports returns a list exports for a package.
var loadExports = loadExportsGoPath
func loadExportsGoPath(dir string) map[string]bool {
exports := make(map[string]bool)
buildPkg, err := build.ImportDir(dir, 0)
if err != nil {
if strings.Contains(err.Error(), "no buildable Go source files in") {
return nil
}
fmt.Fprintf(os.Stderr, "could not import %q: %v\n", dir, err)
return nil
}
fset := token.NewFileSet()
for _, files := range [...][]string{buildPkg.GoFiles, buildPkg.CgoFiles} {
for _, file := range files {
f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0)
if err != nil {
fmt.Fprintf(os.Stderr, "could not parse %q: %v\n", file, err)
continue
}
for name := range f.Scope.Objects {
if ast.IsExported(name) {
exports[name] = true
}
}
}
}
return exports
}
// findImport searches for a package with the given symbols.
// If no package is found, findImport returns "".
// Declared as a variable rather than a function so goimports can be easily
// extended by adding a file with an init function.
var findImport = findImportGoPath
func findImportGoPath(pkgName string, symbols map[string]bool, filename string) (string, bool, error) {
// Fast path for the standard library.
// In the common case we hopefully never have to scan the GOPATH, which can
// be slow with moving disks.
if pkg, rename, ok := findImportStdlib(pkgName, symbols); ok {
return pkg, rename, nil
}
// TODO(sameer): look at the import lines for other Go files in the
// local directory, since the user is likely to import the same packages
// in the current Go file. Return rename=true when the other Go files
// use a renamed package that's also used in the current file.
pkgIndexOnce.Do(loadPkgIndex)
// Collect exports for packages with matching names.
var (
wg sync.WaitGroup
mu sync.Mutex
shortest string
)
pkgIndex.Lock()
for _, pkg := range pkgIndex.m[pkgName] {
if !canUse(filename, pkg.dir) {
continue
}
wg.Add(1)
go func(importpath, dir string) {
defer wg.Done()
exports := loadExports(dir)
if exports == nil {
return
}
// If it doesn't have the right symbols, stop.
for symbol := range symbols {
if !exports[symbol] {
return
}
}
// Devendorize for use in import statement.
if i := strings.LastIndex(importpath, "/vendor/"); i >= 0 {
importpath = importpath[i+len("/vendor/"):]
} else if strings.HasPrefix(importpath, "vendor/") {
importpath = importpath[len("vendor/"):]
}
// Save as the answer.
// If there are multiple candidates, the shortest wins,
// to prefer "bytes" over "github.com/foo/bytes".
mu.Lock()
if shortest == "" || len(importpath) < len(shortest) || len(importpath) == len(shortest) && importpath < shortest {
shortest = importpath
}
mu.Unlock()
}(pkg.importpath, pkg.dir)
}
pkgIndex.Unlock()
wg.Wait()
return shortest, false, nil
}
func canUse(filename, dir string) bool {
dirSlash := filepath.ToSlash(dir)
if !strings.Contains(dirSlash, "/vendor/") && !strings.Contains(dirSlash, "/internal/") && !strings.HasSuffix(dirSlash, "/internal") {
return true
}
// Vendor or internal directory only visible from children of parent.
// That means the path from the current directory to the target directory
// can contain ../vendor or ../internal but not ../foo/vendor or ../foo/internal
// or bar/vendor or bar/internal.
// After stripping all the leading ../, the only okay place to see vendor or internal
// is at the very beginning of the path.
abs, err := filepath.Abs(filename)
if err != nil {
return false
}
rel, err := filepath.Rel(abs, dir)
if err != nil {
return false
}
relSlash := filepath.ToSlash(rel)
if i := strings.LastIndex(relSlash, "../"); i >= 0 {
relSlash = relSlash[i+len("../"):]
}
return !strings.Contains(relSlash, "/vendor/") && !strings.Contains(relSlash, "/internal/") && !strings.HasSuffix(relSlash, "/internal")
}
type visitFn func(node ast.Node) ast.Visitor
func (fn visitFn) Visit(node ast.Node) ast.Visitor {
return fn(node)
}
func findImportStdlib(shortPkg string, symbols map[string]bool) (importPath string, rename, ok bool) {
for symbol := range symbols {
path := stdlib[shortPkg+"."+symbol]
if path == "" {
return "", false, false
}
if importPath != "" && importPath != path {
// Ambiguous. Symbols pointed to different things.
return "", false, false
}
importPath = path
}
return importPath, false, importPath != ""
}

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package imports implements a Go pretty-printer (like package "go/format")
// that also adds or removes import statements as necessary.
package imports
import (
"bufio"
"bytes"
"fmt"
"go/ast"
"go/format"
"go/parser"
"go/printer"
"go/token"
"io"
"regexp"
"strconv"
"strings"
"golang.org/x/tools/go/ast/astutil"
)
// Options specifies options for processing files.
type Options struct {
Fragment bool // Accept fragment of a source file (no package statement)
AllErrors bool // Report all errors (not just the first 10 on different lines)
Comments bool // Print comments (true if nil *Options provided)
TabIndent bool // Use tabs for indent (true if nil *Options provided)
TabWidth int // Tab width (8 if nil *Options provided)
}
// Process formats and adjusts imports for the provided file.
// If opt is nil the defaults are used.
//
// Note that filename's directory influences which imports can be chosen,
// so it is important that filename be accurate.
// To process data ``as if'' it were in filename, pass the data as a non-nil src.
func Process(filename string, src []byte, opt *Options) ([]byte, error) {
if opt == nil {
opt = &Options{Comments: true, TabIndent: true, TabWidth: 8}
}
fileSet := token.NewFileSet()
file, adjust, err := parse(fileSet, filename, src, opt)
if err != nil {
return nil, err
}
_, err = fixImports(fileSet, file, filename)
if err != nil {
return nil, err
}
sortImports(fileSet, file)
imps := astutil.Imports(fileSet, file)
var spacesBefore []string // import paths we need spaces before
for _, impSection := range imps {
// Within each block of contiguous imports, see if any
// import lines are in different group numbers. If so,
// we'll need to put a space between them so it's
// compatible with gofmt.
lastGroup := -1
for _, importSpec := range impSection {
importPath, _ := strconv.Unquote(importSpec.Path.Value)
groupNum := importGroup(importPath)
if groupNum != lastGroup && lastGroup != -1 {
spacesBefore = append(spacesBefore, importPath)
}
lastGroup = groupNum
}
}
printerMode := printer.UseSpaces
if opt.TabIndent {
printerMode |= printer.TabIndent
}
printConfig := &printer.Config{Mode: printerMode, Tabwidth: opt.TabWidth}
var buf bytes.Buffer
err = printConfig.Fprint(&buf, fileSet, file)
if err != nil {
return nil, err
}
out := buf.Bytes()
if adjust != nil {
out = adjust(src, out)
}
if len(spacesBefore) > 0 {
out = addImportSpaces(bytes.NewReader(out), spacesBefore)
}
out, err = format.Source(out)
if err != nil {
return nil, err
}
return out, nil
}
// parse parses src, which was read from filename,
// as a Go source file or statement list.
func parse(fset *token.FileSet, filename string, src []byte, opt *Options) (*ast.File, func(orig, src []byte) []byte, error) {
parserMode := parser.Mode(0)
if opt.Comments {
parserMode |= parser.ParseComments
}
if opt.AllErrors {
parserMode |= parser.AllErrors
}
// Try as whole source file.
file, err := parser.ParseFile(fset, filename, src, parserMode)
if err == nil {
return file, nil, nil
}
// If the error is that the source file didn't begin with a
// package line and we accept fragmented input, fall through to
// try as a source fragment. Stop and return on any other error.
if !opt.Fragment || !strings.Contains(err.Error(), "expected 'package'") {
return nil, nil, err
}
// If this is a declaration list, make it a source file
// by inserting a package clause.
// Insert using a ;, not a newline, so that the line numbers
// in psrc match the ones in src.
psrc := append([]byte("package main;"), src...)
file, err = parser.ParseFile(fset, filename, psrc, parserMode)
if err == nil {
// If a main function exists, we will assume this is a main
// package and leave the file.
if containsMainFunc(file) {
return file, nil, nil
}
adjust := func(orig, src []byte) []byte {
// Remove the package clause.
// Gofmt has turned the ; into a \n.
src = src[len("package main\n"):]
return matchSpace(orig, src)
}
return file, adjust, nil
}
// If the error is that the source file didn't begin with a
// declaration, fall through to try as a statement list.
// Stop and return on any other error.
if !strings.Contains(err.Error(), "expected declaration") {
return nil, nil, err
}
// If this is a statement list, make it a source file
// by inserting a package clause and turning the list
// into a function body. This handles expressions too.
// Insert using a ;, not a newline, so that the line numbers
// in fsrc match the ones in src.
fsrc := append(append([]byte("package p; func _() {"), src...), '}')
file, err = parser.ParseFile(fset, filename, fsrc, parserMode)
if err == nil {
adjust := func(orig, src []byte) []byte {
// Remove the wrapping.
// Gofmt has turned the ; into a \n\n.
src = src[len("package p\n\nfunc _() {"):]
src = src[:len(src)-len("}\n")]
// Gofmt has also indented the function body one level.
// Remove that indent.
src = bytes.Replace(src, []byte("\n\t"), []byte("\n"), -1)
return matchSpace(orig, src)
}
return file, adjust, nil
}
// Failed, and out of options.
return nil, nil, err
}
// containsMainFunc checks if a file contains a function declaration with the
// function signature 'func main()'
func containsMainFunc(file *ast.File) bool {
for _, decl := range file.Decls {
if f, ok := decl.(*ast.FuncDecl); ok {
if f.Name.Name != "main" {
continue
}
if len(f.Type.Params.List) != 0 {
continue
}
if f.Type.Results != nil && len(f.Type.Results.List) != 0 {
continue
}
return true
}
}
return false
}
func cutSpace(b []byte) (before, middle, after []byte) {
i := 0
for i < len(b) && (b[i] == ' ' || b[i] == '\t' || b[i] == '\n') {
i++
}
j := len(b)
for j > 0 && (b[j-1] == ' ' || b[j-1] == '\t' || b[j-1] == '\n') {
j--
}
if i <= j {
return b[:i], b[i:j], b[j:]
}
return nil, nil, b[j:]
}
// matchSpace reformats src to use the same space context as orig.
// 1) If orig begins with blank lines, matchSpace inserts them at the beginning of src.
// 2) matchSpace copies the indentation of the first non-blank line in orig
// to every non-blank line in src.
// 3) matchSpace copies the trailing space from orig and uses it in place
// of src's trailing space.
func matchSpace(orig []byte, src []byte) []byte {
before, _, after := cutSpace(orig)
i := bytes.LastIndex(before, []byte{'\n'})
before, indent := before[:i+1], before[i+1:]
_, src, _ = cutSpace(src)
var b bytes.Buffer
b.Write(before)
for len(src) > 0 {
line := src
if i := bytes.IndexByte(line, '\n'); i >= 0 {
line, src = line[:i+1], line[i+1:]
} else {
src = nil
}
if len(line) > 0 && line[0] != '\n' { // not blank
b.Write(indent)
}
b.Write(line)
}
b.Write(after)
return b.Bytes()
}
var impLine = regexp.MustCompile(`^\s+(?:[\w\.]+\s+)?"(.+)"`)
func addImportSpaces(r io.Reader, breaks []string) []byte {
var out bytes.Buffer
sc := bufio.NewScanner(r)
inImports := false
done := false
for sc.Scan() {
s := sc.Text()
if !inImports && !done && strings.HasPrefix(s, "import") {
inImports = true
}
if inImports && (strings.HasPrefix(s, "var") ||
strings.HasPrefix(s, "func") ||
strings.HasPrefix(s, "const") ||
strings.HasPrefix(s, "type")) {
done = true
inImports = false
}
if inImports && len(breaks) > 0 {
if m := impLine.FindStringSubmatch(s); m != nil {
if m[1] == string(breaks[0]) {
out.WriteByte('\n')
breaks = breaks[1:]
}
}
}
fmt.Fprintln(&out, s)
}
return out.Bytes()
}

173
Godeps/_workspace/src/golang.org/x/tools/imports/mkindex.go generated vendored Normal file
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@ -0,0 +1,173 @@
// +build ignore
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Command mkindex creates the file "pkgindex.go" containing an index of the Go
// standard library. The file is intended to be built as part of the imports
// package, so that the package may be used in environments where a GOROOT is
// not available (such as App Engine).
package main
import (
"bytes"
"fmt"
"go/ast"
"go/build"
"go/format"
"go/parser"
"go/token"
"io/ioutil"
"log"
"os"
"path"
"path/filepath"
"strings"
)
var (
pkgIndex = make(map[string][]pkg)
exports = make(map[string]map[string]bool)
)
func main() {
// Don't use GOPATH.
ctx := build.Default
ctx.GOPATH = ""
// Populate pkgIndex global from GOROOT.
for _, path := range ctx.SrcDirs() {
f, err := os.Open(path)
if err != nil {
log.Print(err)
continue
}
children, err := f.Readdir(-1)
f.Close()
if err != nil {
log.Print(err)
continue
}
for _, child := range children {
if child.IsDir() {
loadPkg(path, child.Name())
}
}
}
// Populate exports global.
for _, ps := range pkgIndex {
for _, p := range ps {
e := loadExports(p.dir)
if e != nil {
exports[p.dir] = e
}
}
}
// Construct source file.
var buf bytes.Buffer
fmt.Fprint(&buf, pkgIndexHead)
fmt.Fprintf(&buf, "var pkgIndexMaster = %#v\n", pkgIndex)
fmt.Fprintf(&buf, "var exportsMaster = %#v\n", exports)
src := buf.Bytes()
// Replace main.pkg type name with pkg.
src = bytes.Replace(src, []byte("main.pkg"), []byte("pkg"), -1)
// Replace actual GOROOT with "/go".
src = bytes.Replace(src, []byte(ctx.GOROOT), []byte("/go"), -1)
// Add some line wrapping.
src = bytes.Replace(src, []byte("}, "), []byte("},\n"), -1)
src = bytes.Replace(src, []byte("true, "), []byte("true,\n"), -1)
var err error
src, err = format.Source(src)
if err != nil {
log.Fatal(err)
}
// Write out source file.
err = ioutil.WriteFile("pkgindex.go", src, 0644)
if err != nil {
log.Fatal(err)
}
}
const pkgIndexHead = `package imports
func init() {
pkgIndexOnce.Do(func() {
pkgIndex.m = pkgIndexMaster
})
loadExports = func(dir string) map[string]bool {
return exportsMaster[dir]
}
}
`
type pkg struct {
importpath string // full pkg import path, e.g. "net/http"
dir string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt"
}
var fset = token.NewFileSet()
func loadPkg(root, importpath string) {
shortName := path.Base(importpath)
if shortName == "testdata" {
return
}
dir := filepath.Join(root, importpath)
pkgIndex[shortName] = append(pkgIndex[shortName], pkg{
importpath: importpath,
dir: dir,
})
pkgDir, err := os.Open(dir)
if err != nil {
return
}
children, err := pkgDir.Readdir(-1)
pkgDir.Close()
if err != nil {
return
}
for _, child := range children {
name := child.Name()
if name == "" {
continue
}
if c := name[0]; c == '.' || ('0' <= c && c <= '9') {
continue
}
if child.IsDir() {
loadPkg(root, filepath.Join(importpath, name))
}
}
}
func loadExports(dir string) map[string]bool {
exports := make(map[string]bool)
buildPkg, err := build.ImportDir(dir, 0)
if err != nil {
if strings.Contains(err.Error(), "no buildable Go source files in") {
return nil
}
log.Printf("could not import %q: %v", dir, err)
return nil
}
for _, file := range buildPkg.GoFiles {
f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0)
if err != nil {
log.Printf("could not parse %q: %v", file, err)
continue
}
for name := range f.Scope.Objects {
if ast.IsExported(name) {
exports[name] = true
}
}
}
return exports
}

93
Godeps/_workspace/src/golang.org/x/tools/imports/mkstdlib.go generated vendored Normal file
View File

@ -0,0 +1,93 @@
// +build ignore
// mkstdlib generates the zstdlib.go file, containing the Go standard
// library API symbols. It's baked into the binary to avoid scanning
// GOPATH in the common case.
package main
import (
"bufio"
"bytes"
"fmt"
"go/format"
"io"
"log"
"os"
"path"
"path/filepath"
"regexp"
"sort"
"strings"
)
func mustOpen(name string) io.Reader {
f, err := os.Open(name)
if err != nil {
log.Fatal(err)
}
return f
}
func api(base string) string {
return filepath.Join(os.Getenv("GOROOT"), "api", base)
}
var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`)
func main() {
var buf bytes.Buffer
outf := func(format string, args ...interface{}) {
fmt.Fprintf(&buf, format, args...)
}
outf("// AUTO-GENERATED BY mkstdlib.go\n\n")
outf("package imports\n")
outf("var stdlib = map[string]string{\n")
f := io.MultiReader(
mustOpen(api("go1.txt")),
mustOpen(api("go1.1.txt")),
mustOpen(api("go1.2.txt")),
mustOpen(api("go1.3.txt")),
mustOpen(api("go1.4.txt")),
mustOpen(api("go1.5.txt")),
)
sc := bufio.NewScanner(f)
fullImport := map[string]string{} // "zip.NewReader" => "archive/zip"
ambiguous := map[string]bool{}
var keys []string
for sc.Scan() {
l := sc.Text()
has := func(v string) bool { return strings.Contains(l, v) }
if has("struct, ") || has("interface, ") || has(", method (") {
continue
}
if m := sym.FindStringSubmatch(l); m != nil {
full := m[1]
key := path.Base(full) + "." + m[2]
if exist, ok := fullImport[key]; ok {
if exist != full {
ambiguous[key] = true
}
} else {
fullImport[key] = full
keys = append(keys, key)
}
}
}
if err := sc.Err(); err != nil {
log.Fatal(err)
}
sort.Strings(keys)
for _, key := range keys {
if ambiguous[key] {
outf("\t// %q is ambiguous\n", key)
} else {
outf("\t%q: %q,\n", key, fullImport[key])
}
}
outf("}\n")
fmtbuf, err := format.Source(buf.Bytes())
if err != nil {
log.Fatal(err)
}
os.Stdout.Write(fmtbuf)
}

212
Godeps/_workspace/src/golang.org/x/tools/imports/sortimports.go generated vendored Normal file
View File

@ -0,0 +1,212 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Hacked up copy of go/ast/import.go
package imports
import (
"go/ast"
"go/token"
"sort"
"strconv"
)
// sortImports sorts runs of consecutive import lines in import blocks in f.
// It also removes duplicate imports when it is possible to do so without data loss.
func sortImports(fset *token.FileSet, f *ast.File) {
for i, d := range f.Decls {
d, ok := d.(*ast.GenDecl)
if !ok || d.Tok != token.IMPORT {
// Not an import declaration, so we're done.
// Imports are always first.
break
}
if len(d.Specs) == 0 {
// Empty import block, remove it.
f.Decls = append(f.Decls[:i], f.Decls[i+1:]...)
}
if !d.Lparen.IsValid() {
// Not a block: sorted by default.
continue
}
// Identify and sort runs of specs on successive lines.
i := 0
specs := d.Specs[:0]
for j, s := range d.Specs {
if j > i && fset.Position(s.Pos()).Line > 1+fset.Position(d.Specs[j-1].End()).Line {
// j begins a new run. End this one.
specs = append(specs, sortSpecs(fset, f, d.Specs[i:j])...)
i = j
}
}
specs = append(specs, sortSpecs(fset, f, d.Specs[i:])...)
d.Specs = specs
// Deduping can leave a blank line before the rparen; clean that up.
if len(d.Specs) > 0 {
lastSpec := d.Specs[len(d.Specs)-1]
lastLine := fset.Position(lastSpec.Pos()).Line
if rParenLine := fset.Position(d.Rparen).Line; rParenLine > lastLine+1 {
fset.File(d.Rparen).MergeLine(rParenLine - 1)
}
}
}
}
func importPath(s ast.Spec) string {
t, err := strconv.Unquote(s.(*ast.ImportSpec).Path.Value)
if err == nil {
return t
}
return ""
}
func importName(s ast.Spec) string {
n := s.(*ast.ImportSpec).Name
if n == nil {
return ""
}
return n.Name
}
func importComment(s ast.Spec) string {
c := s.(*ast.ImportSpec).Comment
if c == nil {
return ""
}
return c.Text()
}
// collapse indicates whether prev may be removed, leaving only next.
func collapse(prev, next ast.Spec) bool {
if importPath(next) != importPath(prev) || importName(next) != importName(prev) {
return false
}
return prev.(*ast.ImportSpec).Comment == nil
}
type posSpan struct {
Start token.Pos
End token.Pos
}
func sortSpecs(fset *token.FileSet, f *ast.File, specs []ast.Spec) []ast.Spec {
// Can't short-circuit here even if specs are already sorted,
// since they might yet need deduplication.
// A lone import, however, may be safely ignored.
if len(specs) <= 1 {
return specs
}
// Record positions for specs.
pos := make([]posSpan, len(specs))
for i, s := range specs {
pos[i] = posSpan{s.Pos(), s.End()}
}
// Identify comments in this range.
// Any comment from pos[0].Start to the final line counts.
lastLine := fset.Position(pos[len(pos)-1].End).Line
cstart := len(f.Comments)
cend := len(f.Comments)
for i, g := range f.Comments {
if g.Pos() < pos[0].Start {
continue
}
if i < cstart {
cstart = i
}
if fset.Position(g.End()).Line > lastLine {
cend = i
break
}
}
comments := f.Comments[cstart:cend]
// Assign each comment to the import spec preceding it.
importComment := map[*ast.ImportSpec][]*ast.CommentGroup{}
specIndex := 0
for _, g := range comments {
for specIndex+1 < len(specs) && pos[specIndex+1].Start <= g.Pos() {
specIndex++
}
s := specs[specIndex].(*ast.ImportSpec)
importComment[s] = append(importComment[s], g)
}
// Sort the import specs by import path.
// Remove duplicates, when possible without data loss.
// Reassign the import paths to have the same position sequence.
// Reassign each comment to abut the end of its spec.
// Sort the comments by new position.
sort.Sort(byImportSpec(specs))
// Dedup. Thanks to our sorting, we can just consider
// adjacent pairs of imports.
deduped := specs[:0]
for i, s := range specs {
if i == len(specs)-1 || !collapse(s, specs[i+1]) {
deduped = append(deduped, s)
} else {
p := s.Pos()
fset.File(p).MergeLine(fset.Position(p).Line)
}
}
specs = deduped
// Fix up comment positions
for i, s := range specs {
s := s.(*ast.ImportSpec)
if s.Name != nil {
s.Name.NamePos = pos[i].Start
}
s.Path.ValuePos = pos[i].Start
s.EndPos = pos[i].End
for _, g := range importComment[s] {
for _, c := range g.List {
c.Slash = pos[i].End
}
}
}
sort.Sort(byCommentPos(comments))
return specs
}
type byImportSpec []ast.Spec // slice of *ast.ImportSpec
func (x byImportSpec) Len() int { return len(x) }
func (x byImportSpec) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
func (x byImportSpec) Less(i, j int) bool {
ipath := importPath(x[i])
jpath := importPath(x[j])
igroup := importGroup(ipath)
jgroup := importGroup(jpath)
if igroup != jgroup {
return igroup < jgroup
}
if ipath != jpath {
return ipath < jpath
}
iname := importName(x[i])
jname := importName(x[j])
if iname != jname {
return iname < jname
}
return importComment(x[i]) < importComment(x[j])
}
type byCommentPos []*ast.CommentGroup
func (x byCommentPos) Len() int { return len(x) }
func (x byCommentPos) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
func (x byCommentPos) Less(i, j int) bool { return x[i].Pos() < x[j].Pos() }

9038
Godeps/_workspace/src/golang.org/x/tools/imports/zstdlib.go generated vendored Normal file
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File diff suppressed because it is too large Load Diff

70
accounts/abi/abi.go
View File

@ -26,17 +26,13 @@ import (
"github.com/ethereum/go-ethereum/common"
)
// Executer is an executer method for performing state executions. It takes one
// argument which is the input data and expects output data to be returned as
// multiple 32 byte word length concatenated slice
type Executer func(datain []byte) []byte
// The ABI holds information about a contract's context and available
// invokable methods. It will allow you to type check function calls and
// packs data accordingly.
type ABI struct {
Methods map[string]Method
Events map[string]Event
Constructor Method
Methods map[string]Method
Events map[string]Event
}
// JSON returns a parsed ABI interface and error if it failed.
@ -53,9 +49,7 @@ func JSON(reader io.Reader) (ABI, error) {
// tests, tests whether the given input would result in a successful
// call. Checks argument list count and matches input to `input`.
func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) {
method := abi.Methods[name]
func (abi ABI) pack(method Method, args ...interface{}) ([]byte, error) {
// variable input is the output appended at the end of packed
// output. This is used for strings and bytes types input.
var variableInput []byte
@ -66,7 +60,7 @@ func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) {
// pack the input
packed, err := input.Type.pack(a)
if err != nil {
return nil, fmt.Errorf("`%s` %v", name, err)
return nil, fmt.Errorf("`%s` %v", method.Name, err)
}
// check for a string or bytes input type
@ -96,26 +90,31 @@ func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) {
// Method ids are created from the first 4 bytes of the hash of the
// methods string signature. (signature = baz(uint32,string32))
func (abi ABI) Pack(name string, args ...interface{}) ([]byte, error) {
method, exist := abi.Methods[name]
if !exist {
return nil, fmt.Errorf("method '%s' not found", name)
}
// Fetch the ABI of the requested method
var method Method
// start with argument count match
if name == "" {
method = abi.Constructor
} else {
m, exist := abi.Methods[name]
if !exist {
return nil, fmt.Errorf("method '%s' not found", name)
}
method = m
}
// Make sure arguments match up and pack them
if len(args) != len(method.Inputs) {
return nil, fmt.Errorf("argument count mismatch: %d for %d", len(args), len(method.Inputs))
}
arguments, err := abi.pack(name, args...)
arguments, err := abi.pack(method, args...)
if err != nil {
return nil, err
}
// Set function id
packed := abi.Methods[name].Id()
packed = append(packed, arguments...)
return packed, nil
// Pack up the method ID too if not a constructor and return
if name == "" {
return arguments, nil
}
return append(method.Id(), arguments...), nil
}
// toGoType parses the input and casts it to the proper type defined by the ABI
@ -169,21 +168,6 @@ func toGoType(i int, t Argument, output []byte) (interface{}, error) {
return nil, fmt.Errorf("abi: unknown type %v", t.Type.T)
}
// Call will unmarshal the output of the call in v. It will return an error if
// invalid type is given or if the output is too short to conform to the ABI
// spec.
//
// Call supports all of the available types and accepts a struct or an interface
// slice if the return is a tuple.
func (abi ABI) Call(executer Executer, v interface{}, name string, args ...interface{}) error {
callData, err := abi.Pack(name, args...)
if err != nil {
return err
}
return abi.unmarshal(v, name, executer(callData))
}
// these variable are used to determine certain types during type assertion for
// assignment.
var (
@ -193,8 +177,8 @@ var (
r_byte = reflect.TypeOf(byte(0))
)
// unmarshal output in v according to the abi specification
func (abi ABI) unmarshal(v interface{}, name string, output []byte) error {
// Unpack output in v according to the abi specification
func (abi ABI) Unpack(v interface{}, name string, output []byte) error {
var method = abi.Methods[name]
if len(output) == 0 {
@ -303,6 +287,10 @@ func (abi *ABI) UnmarshalJSON(data []byte) error {
abi.Events = make(map[string]Event)
for _, field := range fields {
switch field.Type {
case "constructor":
abi.Constructor = Method{
Inputs: field.Inputs,
}
// empty defaults to function according to the abi spec
case "function", "":
abi.Methods[field.Name] = Method{

38
accounts/abi/abi_test.go
View File

@ -579,7 +579,7 @@ func TestMultiReturnWithStruct(t *testing.T) {
Int *big.Int
String string
}
err = abi.unmarshal(&inter, "multi", buff.Bytes())
err = abi.Unpack(&inter, "multi", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -597,7 +597,7 @@ func TestMultiReturnWithStruct(t *testing.T) {
Int *big.Int
}
err = abi.unmarshal(&reversed, "multi", buff.Bytes())
err = abi.Unpack(&reversed, "multi", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -629,7 +629,7 @@ func TestMultiReturnWithSlice(t *testing.T) {
buff.Write(common.RightPadBytes([]byte(stringOut), 32))
var inter []interface{}
err = abi.unmarshal(&inter, "multi", buff.Bytes())
err = abi.Unpack(&inter, "multi", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -661,13 +661,13 @@ func TestMarshalArrays(t *testing.T) {
output := common.LeftPadBytes([]byte{1}, 32)
var bytes10 [10]byte
err = abi.unmarshal(&bytes10, "bytes32", output)
err = abi.Unpack(&bytes10, "bytes32", output)
if err == nil || err.Error() != "abi: cannot unmarshal src (len=32) in to dst (len=10)" {
t.Error("expected error or bytes32 not be assignable to bytes10:", err)
}
var bytes32 [32]byte
err = abi.unmarshal(&bytes32, "bytes32", output)
err = abi.Unpack(&bytes32, "bytes32", output)
if err != nil {
t.Error("didn't expect error:", err)
}
@ -681,13 +681,13 @@ func TestMarshalArrays(t *testing.T) {
)
var b10 B10
err = abi.unmarshal(&b10, "bytes32", output)
err = abi.Unpack(&b10, "bytes32", output)
if err == nil || err.Error() != "abi: cannot unmarshal src (len=32) in to dst (len=10)" {
t.Error("expected error or bytes32 not be assignable to bytes10:", err)
}
var b32 B32
err = abi.unmarshal(&b32, "bytes32", output)
err = abi.Unpack(&b32, "bytes32", output)
if err != nil {
t.Error("didn't expect error:", err)
}
@ -697,7 +697,7 @@ func TestMarshalArrays(t *testing.T) {
output[10] = 1
var shortAssignLong [32]byte
err = abi.unmarshal(&shortAssignLong, "bytes10", output)
err = abi.Unpack(&shortAssignLong, "bytes10", output)
if err != nil {
t.Error("didn't expect error:", err)
}
@ -722,7 +722,7 @@ func TestUnmarshal(t *testing.T) {
// marshal int
var Int *big.Int
err = abi.unmarshal(&Int, "int", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
err = abi.Unpack(&Int, "int", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
if err != nil {
t.Error(err)
}
@ -733,7 +733,7 @@ func TestUnmarshal(t *testing.T) {
// marshal bool
var Bool bool
err = abi.unmarshal(&Bool, "bool", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
err = abi.Unpack(&Bool, "bool", common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
if err != nil {
t.Error(err)
}
@ -750,7 +750,7 @@ func TestUnmarshal(t *testing.T) {
buff.Write(bytesOut)
var Bytes []byte
err = abi.unmarshal(&Bytes, "bytes", buff.Bytes())
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -766,7 +766,7 @@ func TestUnmarshal(t *testing.T) {
bytesOut = common.RightPadBytes([]byte("hello"), 64)
buff.Write(bytesOut)
err = abi.unmarshal(&Bytes, "bytes", buff.Bytes())
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -782,7 +782,7 @@ func TestUnmarshal(t *testing.T) {
bytesOut = common.RightPadBytes([]byte("hello"), 63)
buff.Write(bytesOut)
err = abi.unmarshal(&Bytes, "bytes", buff.Bytes())
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -792,7 +792,7 @@ func TestUnmarshal(t *testing.T) {
}
// marshal dynamic bytes output empty
err = abi.unmarshal(&Bytes, "bytes", nil)
err = abi.Unpack(&Bytes, "bytes", nil)
if err == nil {
t.Error("expected error")
}
@ -803,7 +803,7 @@ func TestUnmarshal(t *testing.T) {
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000005"))
buff.Write(common.RightPadBytes([]byte("hello"), 32))
err = abi.unmarshal(&Bytes, "bytes", buff.Bytes())
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -817,7 +817,7 @@ func TestUnmarshal(t *testing.T) {
buff.Write(common.RightPadBytes([]byte("hello"), 32))
var hash common.Hash
err = abi.unmarshal(&hash, "fixed", buff.Bytes())
err = abi.Unpack(&hash, "fixed", buff.Bytes())
if err != nil {
t.Error(err)
}
@ -830,12 +830,12 @@ func TestUnmarshal(t *testing.T) {
// marshal error
buff.Reset()
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
err = abi.unmarshal(&Bytes, "bytes", buff.Bytes())
err = abi.Unpack(&Bytes, "bytes", buff.Bytes())
if err == nil {
t.Error("expected error")
}
err = abi.unmarshal(&Bytes, "multi", make([]byte, 64))
err = abi.Unpack(&Bytes, "multi", make([]byte, 64))
if err == nil {
t.Error("expected error")
}
@ -850,7 +850,7 @@ func TestUnmarshal(t *testing.T) {
buff.Write(bytesOut)
var out []interface{}
err = abi.unmarshal(&out, "mixedBytes", buff.Bytes())
err = abi.Unpack(&out, "mixedBytes", buff.Bytes())
if err != nil {
t.Fatal("didn't expect error:", err)
}

59
accounts/abi/bind/auth.go Normal file
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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package bind
import (
"errors"
"io"
"io/ioutil"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
)
// NewTransactor is a utility method to easily create a transaction signer from
// an encrypted json key stream and the associated passphrase.
func NewTransactor(keyin io.Reader, passphrase string) (*TransactOpts, error) {
json, err := ioutil.ReadAll(keyin)
if err != nil {
return nil, err
}
key, err := crypto.DecryptKey(json, passphrase)
if err != nil {
return nil, err
}
return NewKeyedTransactor(key), nil
}
// NewKeyedTransactor is a utility method to easily create a transaction signer
// from a plain go-ethereum crypto key.
func NewKeyedTransactor(key *crypto.Key) *TransactOpts {
return &TransactOpts{
From: key.Address,
Signer: func(address common.Address, tx *types.Transaction) (*types.Transaction, error) {
if address != key.Address {
return nil, errors.New("not authorized to sign this account")
}
signature, err := crypto.Sign(tx.SigHash().Bytes(), key.PrivateKey)
if err != nil {
return nil, err
}
return tx.WithSignature(signature)
},
}
}

63
accounts/abi/bind/backend.go Normal file
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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package bind
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// ContractCaller defines the methods needed to allow operating with contract on a read
// only basis.
type ContractCaller interface {
// ContractCall executes an Ethereum contract call with the specified data as
// the input. The pending flag requests execution against the pending block, not
// the stable head of the chain.
ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error)
}
// ContractTransactor defines the methods needed to allow operating with contract
// on a write only basis. Beside the transacting method, the remainder are helpers
// used when the user does not provide some needed values, but rather leaves it up
// to the transactor to decide.
type ContractTransactor interface {
// Nonce retrieves the current pending nonce associated with an account.
PendingAccountNonce(account common.Address) (uint64, error)
// SuggestGasPrice retrieves the currently suggested gas price to allow a timely
// execution of a transaction.
SuggestGasPrice() (*big.Int, error)
// EstimateGasLimit tries to estimate the gas needed to execute a specific
// transaction based on the current pending state of the backend blockchain.
// There is no guarantee that this is the true gas limit requirement as other
// transactions may be added or removed by miners, but it should provide a basis
// for setting a reasonable default.
EstimateGasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error)
// SendTransaction injects the transaction into the pending pool for execution.
SendTransaction(*types.Transaction) error
}
// ContractBackend defines the methods needed to allow operating with contract
// on a read-write basis.
type ContractBackend interface {
ContractCaller
ContractTransactor
}

49
accounts/abi/bind/backends/nil.go Normal file
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@ -0,0 +1,49 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package backends
import (
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// This nil assignment ensures compile time that nilBackend implements bind.ContractBackend.
var _ bind.ContractBackend = (*nilBackend)(nil)
// nilBackend implements bind.ContractBackend, but panics on any method call.
// Its sole purpose is to support the binding tests to construct the generated
// wrappers without calling any methods on them.
type nilBackend struct{}
func (*nilBackend) ContractCall(common.Address, []byte, bool) ([]byte, error) {
panic("not implemented")
}
func (*nilBackend) EstimateGasLimit(common.Address, *common.Address, *big.Int, []byte) (*big.Int, error) {
panic("not implemented")
}
func (*nilBackend) SuggestGasPrice() (*big.Int, error) { panic("not implemented") }
func (*nilBackend) PendingAccountNonce(common.Address) (uint64, error) { panic("not implemented") }
func (*nilBackend) SendTransaction(*types.Transaction) error { panic("not implemented") }
// NewNilBackend creates a new binding backend that can be used for instantiation
// but will panic on any invocation. Its sole purpose is to help testing.
func NewNilBackend() bind.ContractBackend {
return new(nilBackend)
}

216
accounts/abi/bind/backends/remote.go Normal file
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@ -0,0 +1,216 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package backends
import (
"encoding/json"
"fmt"
"math/big"
"sync"
"sync/atomic"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
)
// This nil assignment ensures compile time that rpcBackend implements bind.ContractBackend.
var _ bind.ContractBackend = (*rpcBackend)(nil)
// rpcBackend implements bind.ContractBackend, and acts as the data provider to
// Ethereum contracts bound to Go structs. It uses an RPC connection to delegate
// all its functionality.
//
// Note: The current implementation is a blocking one. This should be replaced
// by a proper async version when a real RPC client is created.
type rpcBackend struct {
client rpc.Client // RPC client connection to interact with an API server
autoid uint32 // ID number to use for the next API request
lock sync.Mutex // Singleton access until we get to request multiplexing
}
// NewRPCBackend creates a new binding backend to an RPC provider that can be
// used to interact with remote contracts.
func NewRPCBackend(client rpc.Client) bind.ContractBackend {
return &rpcBackend{
client: client,
}
}
// request is a JSON RPC request package assembled internally from the client
// method calls.
type request struct {
JSONRPC string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0
ID int `json:"id"` // Auto incrementing ID number for this request
Method string `json:"method"` // Remote procedure name to invoke on the server
Params []interface{} `json:"params"` // List of parameters to pass through (keep types simple)
}
// response is a JSON RPC response package sent back from the API server.
type response struct {
JSONRPC string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0
ID int `json:"id"` // Auto incrementing ID number for this request
Error json.RawMessage `json:"error"` // Any error returned by the remote side
Result json.RawMessage `json:"result"` // Whatever the remote side sends us in reply
}
// request forwards an API request to the RPC server, and parses the response.
//
// This is currently painfully non-concurrent, but it will have to do until we
// find the time for niceties like this :P
func (b *rpcBackend) request(method string, params []interface{}) (json.RawMessage, error) {
b.lock.Lock()
defer b.lock.Unlock()
// Ugly hack to serialize an empty list properly
if params == nil {
params = []interface{}{}
}
// Assemble the request object
req := &request{
JSONRPC: "2.0",
ID: int(atomic.AddUint32(&b.autoid, 1)),
Method: method,
Params: params,
}
if err := b.client.Send(req); err != nil {
return nil, err
}
res := new(response)
if err := b.client.Recv(res); err != nil {
return nil, err
}
if len(res.Error) > 0 {
return nil, fmt.Errorf("remote error: %s", string(res.Error))
}
return res.Result, nil
}
// ContractCall implements ContractCaller.ContractCall, delegating the execution of
// a contract call to the remote node, returning the reply to for local processing.
func (b *rpcBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) {
// Pack up the request into an RPC argument
args := struct {
To common.Address `json:"to"`
Data string `json:"data"`
}{
To: contract,
Data: common.ToHex(data),
}
// Execute the RPC call and retrieve the response
block := "latest"
if pending {
block = "pending"
}
res, err := b.request("eth_call", []interface{}{args, block})
if err != nil {
return nil, err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return nil, err
}
// Convert the response back to a Go byte slice and return
return common.FromHex(hex), nil
}
// PendingAccountNonce implements ContractTransactor.PendingAccountNonce, delegating
// the current account nonce retrieval to the remote node.
func (b *rpcBackend) PendingAccountNonce(account common.Address) (uint64, error) {
res, err := b.request("eth_getTransactionCount", []interface{}{account.Hex(), "pending"})
if err != nil {
return 0, err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return 0, err
}
nonce, ok := new(big.Int).SetString(hex, 0)
if !ok {
return 0, fmt.Errorf("invalid nonce hex: %s", hex)
}
return nonce.Uint64(), nil
}
// SuggestGasPrice implements ContractTransactor.SuggestGasPrice, delegating the
// gas price oracle request to the remote node.
func (b *rpcBackend) SuggestGasPrice() (*big.Int, error) {
res, err := b.request("eth_gasPrice", nil)
if err != nil {
return nil, err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return nil, err
}
price, ok := new(big.Int).SetString(hex, 0)
if !ok {
return nil, fmt.Errorf("invalid price hex: %s", hex)
}
return price, nil
}
// EstimateGasLimit implements ContractTransactor.EstimateGasLimit, delegating
// the gas estimation to the remote node.
func (b *rpcBackend) EstimateGasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) {
// Pack up the request into an RPC argument
args := struct {
From common.Address `json:"from"`
To *common.Address `json:"to"`
Value *rpc.HexNumber `json:"value"`
Data string `json:"data"`
}{
From: sender,
To: contract,
Data: common.ToHex(data),
Value: rpc.NewHexNumber(value),
}
// Execute the RPC call and retrieve the response
res, err := b.request("eth_estimateGas", []interface{}{args})
if err != nil {
return nil, err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return nil, err
}
estimate, ok := new(big.Int).SetString(hex, 0)
if !ok {
return nil, fmt.Errorf("invalid estimate hex: %s", hex)
}
return estimate, nil
}
// SendTransaction implements ContractTransactor.SendTransaction, delegating the
// raw transaction injection to the remote node.
func (b *rpcBackend) SendTransaction(tx *types.Transaction) error {
data, err := rlp.EncodeToBytes(tx)
if err != nil {
return err
}
res, err := b.request("eth_sendRawTransaction", []interface{}{common.ToHex(data)})
if err != nil {
return err
}
var hex string
if err := json.Unmarshal(res, &hex); err != nil {
return err
}
return nil
}

187
accounts/abi/bind/backends/simulated.go Normal file
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@ -0,0 +1,187 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package backends
import (
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
)
// This nil assignment ensures compile time that SimulatedBackend implements bind.ContractBackend.
var _ bind.ContractBackend = (*SimulatedBackend)(nil)
// SimulatedBackend implements bind.ContractBackend, simulating a blockchain in
// the background. Its main purpose is to allow easily testing contract bindings.
type SimulatedBackend struct {
database ethdb.Database // In memory database to store our testing data
blockchain *core.BlockChain // Ethereum blockchain to handle the consensus
pendingBlock *types.Block // Currently pending block that will be imported on request
pendingState *state.StateDB // Currently pending state that will be the active on on request
}
// NewSimulatedBackend creates a new binding backend using a simulated blockchain
// for testing purposes.
func NewSimulatedBackend(accounts ...core.GenesisAccount) *SimulatedBackend {
database, _ := ethdb.NewMemDatabase()
core.WriteGenesisBlockForTesting(database, accounts...)
blockchain, _ := core.NewBlockChain(database, new(core.FakePow), new(event.TypeMux))
backend := &SimulatedBackend{
database: database,
blockchain: blockchain,
}
backend.Rollback()
return backend
}
// Commit imports all the pending transactions as a single block and starts a
// fresh new state.
func (b *SimulatedBackend) Commit() {
if _, err := b.blockchain.InsertChain([]*types.Block{b.pendingBlock}); err != nil {
panic(err) // This cannot happen unless the simulator is wrong, fail in that case
}
b.Rollback()
}
// Rollback aborts all pending transactions, reverting to the last committed state.
func (b *SimulatedBackend) Rollback() {
blocks, _ := core.GenerateChain(b.blockchain.CurrentBlock(), b.database, 1, func(int, *core.BlockGen) {})
b.pendingBlock = blocks[0]
b.pendingState, _ = state.New(b.pendingBlock.Root(), b.database)
}
// ContractCall implements ContractCaller.ContractCall, executing the specified
// contract with the given input data.
func (b *SimulatedBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) {
// Create a copy of the current state db to screw around with
var (
block *types.Block
statedb *state.StateDB
)
if pending {
block, statedb = b.pendingBlock, b.pendingState.Copy()
} else {
block = b.blockchain.CurrentBlock()
statedb, _ = b.blockchain.State()
}
// Set infinite balance to the a fake caller account
from := statedb.GetOrNewStateObject(common.Address{})
from.SetBalance(common.MaxBig)
// Assemble the call invocation to measure the gas usage
msg := callmsg{
from: from,
to: &contract,
gasPrice: new(big.Int),
gasLimit: common.MaxBig,
value: new(big.Int),
data: data,
}
// Execute the call and return
vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header(), nil)
gaspool := new(core.GasPool).AddGas(common.MaxBig)
out, _, err := core.ApplyMessage(vmenv, msg, gaspool)
return out, err
}
// PendingAccountNonce implements ContractTransactor.PendingAccountNonce, retrieving
// the nonce currently pending for the account.
func (b *SimulatedBackend) PendingAccountNonce(account common.Address) (uint64, error) {
return b.pendingState.GetOrNewStateObject(account).Nonce(), nil
}
// SuggestGasPrice implements ContractTransactor.SuggestGasPrice. Since the simulated
// chain doens't have miners, we just return a gas price of 1 for any call.
func (b *SimulatedBackend) SuggestGasPrice() (*big.Int, error) {
return big.NewInt(1), nil
}
// EstimateGasLimit implements ContractTransactor.EstimateGasLimit, executing the
// requested code against the currently pending block/state and returning the used
// gas.
func (b *SimulatedBackend) EstimateGasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) {
// Create a copy of the currently pending state db to screw around with
var (
block = b.pendingBlock
statedb = b.pendingState.Copy()
)
// Set infinite balance to the a fake caller account
from := statedb.GetOrNewStateObject(sender)
from.SetBalance(common.MaxBig)
// Assemble the call invocation to measure the gas usage
msg := callmsg{
from: from,
to: contract,
gasPrice: new(big.Int),
gasLimit: common.MaxBig,
value: value,
data: data,
}
// Execute the call and return
vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header(), nil)
gaspool := new(core.GasPool).AddGas(common.MaxBig)
_, gas, err := core.ApplyMessage(vmenv, msg, gaspool)
return gas, err
}
// SendTransaction implements ContractTransactor.SendTransaction, delegating the raw
// transaction injection to the remote node.
func (b *SimulatedBackend) SendTransaction(tx *types.Transaction) error {
blocks, _ := core.GenerateChain(b.blockchain.CurrentBlock(), b.database, 1, func(number int, block *core.BlockGen) {
for _, tx := range b.pendingBlock.Transactions() {
block.AddTx(tx)
}
block.AddTx(tx)
})
b.pendingBlock = blocks[0]
b.pendingState, _ = state.New(b.pendingBlock.Root(), b.database)
return nil
}
// callmsg implements core.Message to allow passing it as a transaction simulator.
type callmsg struct {
from *state.StateObject
to *common.Address
gasLimit *big.Int
gasPrice *big.Int
value *big.Int
data []byte
}
func (m callmsg) From() (common.Address, error) { return m.from.Address(), nil }
func (m callmsg) FromFrontier() (common.Address, error) { return m.from.Address(), nil }
func (m callmsg) Nonce() uint64 { return m.from.Nonce() }
func (m callmsg) To() *common.Address { return m.to }
func (m callmsg) GasPrice() *big.Int { return m.gasPrice }
func (m callmsg) Gas() *big.Int { return m.gasLimit }
func (m callmsg) Value() *big.Int { return m.value }
func (m callmsg) Data() []byte { return m.data }

174
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@ -0,0 +1,174 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package bind
import (
"errors"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
)
// SignerFn is a signer function callback when a contract requires a method to
// sign the transaction before submission.
type SignerFn func(common.Address, *types.Transaction) (*types.Transaction, error)
// CallOpts is the collection of options to fine tune a contract call request.
type CallOpts struct {
Pending bool // Whether to operate on the pending state or the last known one
}
// TransactOpts is the collection of authorization data required to create a
// valid Ethereum transaction.
type TransactOpts struct {
From common.Address // Ethereum account to send the transaction from
Nonce *big.Int // Nonce to use for the transaction execution (nil = use pending state)
Signer SignerFn // Method to use for signing the transaction (mandatory)
Value *big.Int // Funds to transfer along along the transaction (nil = 0 = no funds)
GasPrice *big.Int // Gas price to use for the transaction execution (nil = gas price oracle)
GasLimit *big.Int // Gas limit to set for the transaction execution (nil = estimate + 10%)
}
// BoundContract is the base wrapper object that reflects a contract on the
// Ethereum network. It contains a collection of methods that are used by the
// higher level contract bindings to operate.
type BoundContract struct {
address common.Address // Deployment address of the contract on the Ethereum blockchain
abi abi.ABI // Reflect based ABI to access the correct Ethereum methods
caller ContractCaller // Read interface to interact with the blockchain
transactor ContractTransactor // Write interface to interact with the blockchain
}
// NewBoundContract creates a low level contract interface through which calls
// and transactions may be made through.
func NewBoundContract(address common.Address, abi abi.ABI, caller ContractCaller, transactor ContractTransactor) *BoundContract {
return &BoundContract{
address: address,
abi: abi,
caller: caller,
transactor: transactor,
}
}
// DeployContract deploys a contract onto the Ethereum blockchain and binds the
// deployment address with a Go wrapper.
func DeployContract(opts *TransactOpts, abi abi.ABI, bytecode []byte, backend ContractBackend, params ...interface{}) (common.Address, *types.Transaction, *BoundContract, error) {
// Otherwise try to deploy the contract
c := NewBoundContract(common.Address{}, abi, backend, backend)
input, err := c.abi.Pack("", params...)
if err != nil {
return common.Address{}, nil, nil, err
}
tx, err := c.transact(opts, nil, append(bytecode, input...))
if err != nil {
return common.Address{}, nil, nil, err
}
c.address = crypto.CreateAddress(opts.From, tx.Nonce())
return c.address, tx, c, nil
}
// Call invokes the (constant) contract method with params as input values and
// sets the output to result. The result type might be a single field for simple
// returns, a slice of interfaces for anonymous returns and a struct for named
// returns.
func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string, params ...interface{}) error {
// Don't crash on a lazy user
if opts == nil {
opts = new(CallOpts)
}
// Pack the input, call and unpack the results
input, err := c.abi.Pack(method, params...)
if err != nil {
return err
}
output, err := c.caller.ContractCall(c.address, input, opts.Pending)
if err != nil {
return err
}
return c.abi.Unpack(result, method, output)
}
// Transact invokes the (paid) contract method with params as input values and
// value as the fund transfer to the contract.
func (c *BoundContract) Transact(opts *TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
// Otherwise pack up the parameters and invoke the contract
input, err := c.abi.Pack(method, params...)
if err != nil {
return nil, err
}
return c.transact(opts, &c.address, input)
}
// transact executes an actual transaction invocation, first deriving any missing
// authorization fields, and then scheduling the transaction for execution.
func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, input []byte) (*types.Transaction, error) {
var err error
// Ensure a valid value field and resolve the account nonce
value := opts.Value
if value == nil {
value = new(big.Int)
}
nonce := uint64(0)
if opts.Nonce == nil {
nonce, err = c.transactor.PendingAccountNonce(opts.From)
if err != nil {
return nil, fmt.Errorf("failed to retrieve account nonce: %v", err)
}
} else {
nonce = opts.Nonce.Uint64()
}
// Figure out the gas allowance and gas price values
gasPrice := opts.GasPrice
if gasPrice == nil {
gasPrice, err = c.transactor.SuggestGasPrice()
if err != nil {
return nil, fmt.Errorf("failed to suggest gas price: %v", err)
}
}
gasLimit := opts.GasLimit
if gasLimit == nil {
gasLimit, err = c.transactor.EstimateGasLimit(opts.From, contract, value, input)
if err != nil {
return nil, fmt.Errorf("failed to exstimate gas needed: %v", err)
}
}
// Create the transaction, sign it and schedule it for execution
var rawTx *types.Transaction
if contract == nil {
rawTx = types.NewContractCreation(nonce, value, gasLimit, gasPrice, input)
} else {
rawTx = types.NewTransaction(nonce, c.address, value, gasLimit, gasPrice, input)
}
if opts.Signer == nil {
return nil, errors.New("no signer to authorize the transaction with")
}
signedTx, err := opts.Signer(opts.From, rawTx)
if err != nil {
return nil, err
}
if err := c.transactor.SendTransaction(signedTx); err != nil {
return nil, err
}
return signedTx, nil
}

173
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// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package bind generates Ethereum contract Go bindings.
//
// Detailed usage document and tutorial available on the go-ethereum Wiki page:
// https://github.com/ethereum/go-ethereum/wiki/Native-DApps:-Go-bindings-to-Ethereum-contracts
package bind
import (
"bytes"
"fmt"
"strings"
"text/template"
"unicode"
"github.com/ethereum/go-ethereum/accounts/abi"
"golang.org/x/tools/imports"
)
// Bind generates a Go wrapper around a contract ABI. This wrapper isn't meant
// to be used as is in client code, but rather as an intermediate struct which
// enforces compile time type safety and naming convention opposed to having to
// manually maintain hard coded strings that break on runtime.
func Bind(types []string, abis []string, bytecodes []string, pkg string) (string, error) {
// Process each individual contract requested binding
contracts := make(map[string]*tmplContract)
for i := 0; i < len(types); i++ {
// Parse the actual ABI to generate the binding for
evmABI, err := abi.JSON(strings.NewReader(abis[i]))
if err != nil {
return "", err
}
// Strip any whitespace from the JSON ABI
strippedABI := strings.Map(func(r rune) rune {
if unicode.IsSpace(r) {
return -1
}
return r
}, abis[i])
// Extract the call and transact methods, and sort them alphabetically
var (
calls = make(map[string]*tmplMethod)
transacts = make(map[string]*tmplMethod)
)
for _, original := range evmABI.Methods {
// Normalize the method for capital cases and non-anonymous inputs/outputs
normalized := original
normalized.Name = capitalise(original.Name)
normalized.Inputs = make([]abi.Argument, len(original.Inputs))
copy(normalized.Inputs, original.Inputs)
for j, input := range normalized.Inputs {
if input.Name == "" {
normalized.Inputs[j].Name = fmt.Sprintf("arg%d", j)
}
}
normalized.Outputs = make([]abi.Argument, len(original.Outputs))
copy(normalized.Outputs, original.Outputs)
for j, output := range normalized.Outputs {
if output.Name != "" {
normalized.Outputs[j].Name = capitalise(output.Name)
}
}
// Append the methos to the call or transact lists
if original.Const {
calls[original.Name] = &tmplMethod{Original: original, Normalized: normalized, Structured: structured(original)}
} else {
transacts[original.Name] = &tmplMethod{Original: original, Normalized: normalized, Structured: structured(original)}
}
}
contracts[types[i]] = &tmplContract{
Type: capitalise(types[i]),
InputABI: strippedABI,
InputBin: strings.TrimSpace(bytecodes[i]),
Constructor: evmABI.Constructor,
Calls: calls,
Transacts: transacts,
}
}
// Generate the contract template data content and render it
data := &tmplData{
Package: pkg,
Contracts: contracts,
}
buffer := new(bytes.Buffer)
funcs := map[string]interface{}{
"bindtype": bindType,
}
tmpl := template.Must(template.New("").Funcs(funcs).Parse(tmplSource))
if err := tmpl.Execute(buffer, data); err != nil {
return "", err
}
// Pass the code through goimports to clean it up and double check
code, err := imports.Process("", buffer.Bytes(), nil)
if err != nil {
return "", fmt.Errorf("%v\n%s", err, buffer)
}
return string(code), nil
}
// bindType converts a Solidity type to a Go one. Since there is no clear mapping
// from all Solidity types to Go ones (e.g. uint17), those that cannot be exactly
// mapped will use an upscaled type (e.g. *big.Int).
func bindType(kind abi.Type) string {
stringKind := kind.String()
switch {
case stringKind == "address":
return "common.Address"
case stringKind == "hash":
return "common.Hash"
case strings.HasPrefix(stringKind, "bytes"):
if stringKind == "bytes" {
return "[]byte"
}
return fmt.Sprintf("[%s]byte", stringKind[5:])
case strings.HasPrefix(stringKind, "int"):
switch stringKind[:3] {
case "8", "16", "32", "64":
return stringKind
}
return "*big.Int"
case strings.HasPrefix(stringKind, "uint"):
switch stringKind[:4] {
case "8", "16", "32", "64":
return stringKind
}
return "*big.Int"
default:
return stringKind
}
}
// capitalise makes the first character of a string upper case.
func capitalise(input string) string {
return strings.ToUpper(input[:1]) + input[1:]
}
// structured checks whether a method has enough information to return a proper
// Go struct ot if flat returns are needed.
func structured(method abi.Method) bool {
if len(method.Outputs) < 2 {
return false
}
for _, out := range method.Outputs {
if out.Name == "" {
return false
}
}
return true
}

255
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212
accounts/abi/bind/template.go Normal file
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@ -0,0 +1,212 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package bind
import "github.com/ethereum/go-ethereum/accounts/abi"
// tmplData is the data structure required to fill the binding template.
type tmplData struct {
Package string // Name of the package to place the generated file in
Contracts map[string]*tmplContract // List of contracts to generate into this file
}
// tmplContract contains the data needed to generate an individual contract binding.
type tmplContract struct {
Type string // Type name of the main contract binding
InputABI string // JSON ABI used as the input to generate the binding from
InputBin string // Optional EVM bytecode used to denetare deploy code from
Constructor abi.Method // Contract constructor for deploy parametrization
Calls map[string]*tmplMethod // Contract calls that only read state data
Transacts map[string]*tmplMethod // Contract calls that write state data
}
// tmplMethod is a wrapper around an abi.Method that contains a few preprocessed
// and cached data fields.
type tmplMethod struct {
Original abi.Method // Original method as parsed by the abi package
Normalized abi.Method // Normalized version of the parsed method (capitalized names, non-anonymous args/returns)
Structured bool // Whether the returns should be accumulated into a contract
}
// tmplSource is the Go source template use to generate the contract binding
// based on.
const tmplSource = `
// This file is an automatically generated Go binding. Do not modify as any
// change will likely be lost upon the next re-generation!
package {{.Package}}
{{range $contract := .Contracts}}
// {{.Type}}ABI is the input ABI used to generate the binding from.
const {{.Type}}ABI = ` + "`" + `{{.InputABI}}` + "`" + `
{{if .InputBin}}
// {{.Type}}Bin is the compiled bytecode used for deploying new contracts.
const {{.Type}}Bin = ` + "`" + `{{.InputBin}}` + "`" + `
// Deploy{{.Type}} deploys a new Ethereum contract, binding an instance of {{.Type}} to it.
func Deploy{{.Type}}(auth *bind.TransactOpts, backend bind.ContractBackend {{range .Constructor.Inputs}}, {{.Name}} {{bindtype .Type}}{{end}}) (common.Address, *types.Transaction, *{{.Type}}, error) {
parsed, err := abi.JSON(strings.NewReader({{.Type}}ABI))
if err != nil {
return common.Address{}, nil, nil, err
}
address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex({{.Type}}Bin), backend {{range .Constructor.Inputs}}, {{.Name}}{{end}})
if err != nil {
return common.Address{}, nil, nil, err
}
return address, tx, &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract} }, nil
}
{{end}}
// {{.Type}} is an auto generated Go binding around an Ethereum contract.
type {{.Type}} struct {
{{.Type}}Caller // Read-only binding to the contract
{{.Type}}Transactor // Write-only binding to the contract
}
// {{.Type}}Caller is an auto generated read-only Go binding around an Ethereum contract.
type {{.Type}}Caller struct {
contract *bind.BoundContract // Generic contract wrapper for the low level calls
}
// {{.Type}}Transactor is an auto generated write-only Go binding around an Ethereum contract.
type {{.Type}}Transactor struct {
contract *bind.BoundContract // Generic contract wrapper for the low level calls
}
// {{.Type}}Session is an auto generated Go binding around an Ethereum contract,
// with pre-set call and transact options.
type {{.Type}}Session struct {
Contract *{{.Type}} // Generic contract binding to set the session for
CallOpts bind.CallOpts // Call options to use throughout this session
TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
}
// {{.Type}}CallerSession is an auto generated read-only Go binding around an Ethereum contract,
// with pre-set call options.
type {{.Type}}CallerSession struct {
Contract *{{.Type}}Caller // Generic contract caller binding to set the session for
CallOpts bind.CallOpts // Call options to use throughout this session
}
// {{.Type}}TransactorSession is an auto generated write-only Go binding around an Ethereum contract,
// with pre-set transact options.
type {{.Type}}TransactorSession struct {
Contract *{{.Type}}Transactor // Generic contract transactor binding to set the session for
TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
}
// New{{.Type}} creates a new instance of {{.Type}}, bound to a specific deployed contract.
func New{{.Type}}(address common.Address, backend bind.ContractBackend) (*{{.Type}}, error) {
contract, err := bind{{.Type}}(address, backend.(bind.ContractCaller), backend.(bind.ContractTransactor))
if err != nil {
return nil, err
}
return &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract} }, nil
}
// New{{.Type}}Caller creates a new read-only instance of {{.Type}}, bound to a specific deployed contract.
func New{{.Type}}Caller(address common.Address, caller bind.ContractCaller) (*{{.Type}}Caller, error) {
contract, err := bind{{.Type}}(address, caller, nil)
if err != nil {
return nil, err
}
return &{{.Type}}Caller{contract: contract}, nil
}
// New{{.Type}}Transactor creates a new write-only instance of {{.Type}}, bound to a specific deployed contract.
func New{{.Type}}Transactor(address common.Address, transactor bind.ContractTransactor) (*{{.Type}}Transactor, error) {
contract, err := bind{{.Type}}(address, nil, transactor)
if err != nil {
return nil, err
}
return &{{.Type}}Transactor{contract: contract}, nil
}
// bind{{.Type}} binds a generic wrapper to an already deployed contract.
func bind{{.Type}}(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor) (*bind.BoundContract, error) {
parsed, err := abi.JSON(strings.NewReader({{.Type}}ABI))
if err != nil {
return nil, err
}
return bind.NewBoundContract(address, parsed, caller, transactor), nil
}
{{range .Calls}}
{{if .Structured}}
// {{.Normalized.Name}}Result is the result of the {{.Normalized.Name}} invocation."
type {{.Normalized.Name}}Result struct {
{{range .Normalized.Outputs}}{{.Name}} {{bindtype .Type}}
{{end}}
}
{{end}}
// {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Caller) {{.Normalized.Name}}(opts *bind.CallOpts {{range .Normalized.Inputs}}, {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result,{{else}}{{range .Normalized.Outputs}}{{bindtype .Type}},{{end}}{{end}} error) {
var (
{{if .Structured}}ret = new(*{{.Normalized.Name}}Result){{else}}{{range $i, $_ := .Normalized.Outputs}}ret{{$i}} = new({{bindtype .Type}})
{{end}}{{end}}
)
out := {{if .Structured}}ret{{else}}{{if eq (len .Normalized.Outputs) 1}}ret0{{else}}[]interface{}{
{{range $i, $_ := .Normalized.Outputs}}ret{{$i}},
{{end}}
}{{end}}{{end}}
err := _{{$contract.Type}}.contract.Call(opts, out, "{{.Original.Name}}" {{range .Normalized.Inputs}}, {{.Name}}{{end}})
return {{if .Structured}}*ret,{{else}}{{range $i, $_ := .Normalized.Outputs}}*ret{{$i}},{{end}}{{end}} err
}
// {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Session) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type}},{{end}} {{end}} error) {
return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.CallOpts {{range .Normalized.Inputs}}, {{.Name}}{{end}})
}
// {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}CallerSession) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type}},{{end}} {{end}} error) {
return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.CallOpts {{range .Normalized.Inputs}}, {{.Name}}{{end}})
}
{{end}}
{{range .Transacts}}
// {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Transactor) {{.Normalized.Name}}(opts *bind.TransactOpts {{range .Normalized.Inputs}}, {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) {
return _{{$contract.Type}}.contract.Transact(opts, "{{.Original.Name}}" {{range .Normalized.Inputs}}, {{.Name}}{{end}})
}
// {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Session) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.TransactOpts {{range $i, $_ := .Normalized.Inputs}}, {{.Name}}{{end}})
}
// {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}TransactorSession) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.TransactOpts {{range $i, $_ := .Normalized.Inputs}}, {{.Name}}{{end}})
}
{{end}}
{{end}}
`

124
cmd/abigen/main.go Normal file
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@ -0,0 +1,124 @@
// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"os"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common/compiler"
)
var (
abiFlag = flag.String("abi", "", "Path to the Ethereum contract ABI json to bind")
binFlag = flag.String("bin", "", "Path to the Ethereum contract bytecode (generate deploy method)")
typFlag = flag.String("type", "", "Go struct name for the binding (default = package name)")
solFlag = flag.String("sol", "", "Path to the Ethereum contract Solidity source to build and bind")
solcFlag = flag.String("solc", "solc", "Solidity compiler to use if source builds are requested")
pkgFlag = flag.String("pkg", "", "Go package name to generate the binding into")
outFlag = flag.String("out", "", "Output file for the generated binding (default = stdout)")
)
func main() {
// Parse and ensure all needed inputs are specified
flag.Parse()
if *abiFlag == "" && *solFlag == "" {
fmt.Printf("No contract ABI (--abi) or Solidity source (--sol) specified\n")
os.Exit(-1)
} else if (*abiFlag != "" || *binFlag != "" || *typFlag != "") && *solFlag != "" {
fmt.Printf("Contract ABI (--abi), bytecode (--bin) and type (--type) flags are mutually exclusive with the Solidity source (--sol) flag\n")
os.Exit(-1)
}
if *pkgFlag == "" {
fmt.Printf("No destination Go package specified (--pkg)\n")
os.Exit(-1)
}
// If the entire solidity code was specified, build and bind based on that
var (
abis []string
bins []string
types []string
)
if *solFlag != "" {
solc, err := compiler.New(*solcFlag)
if err != nil {
fmt.Printf("Failed to locate Solidity compiler: %v\n", err)
os.Exit(-1)
}
source, err := ioutil.ReadFile(*solFlag)
if err != nil {
fmt.Printf("Failed to read Soldity source code: %v\n", err)
os.Exit(-1)
}
contracts, err := solc.Compile(string(source))
if err != nil {
fmt.Printf("Failed to build Solidity contract: %v\n", err)
os.Exit(-1)
}
for name, contract := range contracts {
abi, _ := json.Marshal(contract.Info.AbiDefinition) // Flatten the compiler parse
abis = append(abis, string(abi))
bins = append(bins, contract.Code)
types = append(types, name)
}
} else {
// Otherwise load up the ABI, optional bytecode and type name from the parameters
abi, err := ioutil.ReadFile(*abiFlag)
if err != nil {
fmt.Printf("Failed to read input ABI: %v\n", err)
os.Exit(-1)
}
abis = append(abis, string(abi))
bin := []byte{}
if *binFlag != "" {
if bin, err = ioutil.ReadFile(*binFlag); err != nil {
fmt.Printf("Failed to read input bytecode: %v\n", err)
os.Exit(-1)
}
}
bins = append(bins, string(bin))
kind := *typFlag
if kind == "" {
kind = *pkgFlag
}
types = append(types, kind)
}
// Generate the contract binding
code, err := bind.Bind(types, abis, bins, *pkgFlag)
if err != nil {
fmt.Printf("Failed to generate ABI binding: %v\n", err)
os.Exit(-1)
}
// Either flush it out to a file or display on the standard output
if *outFlag == "" {
fmt.Printf("%s\n", code)
return
}
if err := ioutil.WriteFile(*outFlag, []byte(code), 0600); err != nil {
fmt.Printf("Failed to write ABI binding: %v\n", err)
os.Exit(-1)
}
}

2
eth/api.go
View File

@ -689,7 +689,7 @@ func (s *PublicBlockChainAPI) Call(args CallArgs, blockNr rpc.BlockNumber) (stri
// EstimateGas returns an estimate of the amount of gas needed to execute the given transaction.
func (s *PublicBlockChainAPI) EstimateGas(args CallArgs) (*rpc.HexNumber, error) {
_, gas, err := s.doCall(args, rpc.LatestBlockNumber)
_, gas, err := s.doCall(args, rpc.PendingBlockNumber)
return rpc.NewHexNumber(gas), err
}