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common/compiler: simplify solc wrapper

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Support for legacy version 0.9.x is gone. The compiler version is no
longer cached. Compilation results (and the version) are read directly
from stdout using the --combined-json flag. As a workaround for
ethereum/solidity#651, source code is written to a temporary file before
compilation.

Integration of solc in package ethapi and cmd/abigen is now much simpler
because the compiler wrapper is no longer passed around as a pointer.

Fixes #2806, accidentally
This commit is contained in:
Felix Lange 2016-06-15 00:36:31 +02:00
parent 84d11c19fd
commit 1a9e66915b
8 changed files with 226 additions and 255 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
cmd/abigen/main.go
View File

@ -68,18 +68,7 @@ func main() {
for _, kind := range strings.Split(*excFlag, ",") {
exclude[strings.ToLower(kind)] = true
}
// Build the Solidity source into bindable components
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))
contracts, err := compiler.CompileSolidity(*solcFlag, *solFlag)
if err != nil {
fmt.Printf("Failed to build Solidity contract: %v\n", err)
os.Exit(-1)

217
common/compiler/solidity.go
View File

@ -14,6 +14,7 @@
// 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 compiler wraps the Solidity compiler executable (solc).
package compiler
import (
@ -21,42 +22,23 @@ import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
var (
versionRegexp = regexp.MustCompile("[0-9]+\\.[0-9]+\\.[0-9]+")
legacyRegexp = regexp.MustCompile("0\\.(9\\..*|1\\.[01])")
paramsLegacy = []string{
"--binary", // Request to output the contract in binary (hexadecimal).
"file", //
"--json-abi", // Request to output the contract's JSON ABI interface.
"file", //
"--natspec-user", // Request to output the contract's Natspec user documentation.
"file", //
"--natspec-dev", // Request to output the contract's Natspec developer documentation.
"file",
"--add-std",
"1",
}
paramsNew = []string{
"--bin", // Request to output the contract in binary (hexadecimal).
"--abi", // Request to output the contract's JSON ABI interface.
"--userdoc", // Request to output the contract's Natspec user documentation.
"--devdoc", // Request to output the contract's Natspec developer documentation.
solcParams = []string{
"--combined-json", "bin,abi,userdoc,devdoc",
"--add-std", // include standard lib contracts
"--optimize", // code optimizer switched on
"-o", // output directory
}
)
@ -76,135 +58,112 @@ type ContractInfo struct {
DeveloperDoc interface{} `json:"developerDoc"`
}
// Solidity contains information about the solidity compiler.
type Solidity struct {
solcPath string
version string
fullVersion string
legacy bool
Path, Version, FullVersion string
}
func New(solcPath string) (sol *Solidity, err error) {
// set default solc
if len(solcPath) == 0 {
solcPath = "solc"
}
solcPath, err = exec.LookPath(solcPath)
if err != nil {
return
}
// --combined-output format
type solcOutput struct {
Contracts map[string]struct{ Bin, Abi, Devdoc, Userdoc string }
Version string
}
cmd := exec.Command(solcPath, "--version")
// SolidityVersion runs solc and parses its version output.
func SolidityVersion(solc string) (*Solidity, error) {
if solc == "" {
solc = "solc"
}
var out bytes.Buffer
cmd := exec.Command(solc, "--version")
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
return
if err := cmd.Run(); err != nil {
return nil, err
}
fullVersion := out.String()
version := versionRegexp.FindString(fullVersion)
legacy := legacyRegexp.MatchString(version)
sol = &Solidity{
solcPath: solcPath,
version: version,
fullVersion: fullVersion,
legacy: legacy,
s := &Solidity{
Path: cmd.Path,
FullVersion: out.String(),
Version: versionRegexp.FindString(out.String()),
}
glog.V(logger.Info).Infoln(sol.Info())
return
return s, nil
}
func (sol *Solidity) Info() string {
return fmt.Sprintf("%s\npath: %s", sol.fullVersion, sol.solcPath)
}
func (sol *Solidity) Version() string {
return sol.version
}
// Compile builds and returns all the contracts contained within a source string.
func (sol *Solidity) Compile(source string) (map[string]*Contract, error) {
// Short circuit if no source code was specified
// CompileSolidityString builds and returns all the contracts contained within a source string.
func CompileSolidityString(solc, source string) (map[string]*Contract, error) {
if len(source) == 0 {
return nil, errors.New("solc: empty source string")
}
// Create a safe place to dump compilation output
wd, err := ioutil.TempDir("", "solc")
if solc == "" {
solc = "solc"
}
// Write source to a temporary file. Compiling stdin used to be supported
// but seems to produce an exception with solc 0.3.5.
infile, err := ioutil.TempFile("", "geth-compile-solidity")
if err != nil {
return nil, fmt.Errorf("solc: failed to create temporary build folder: %v", err)
return nil, err
}
defer os.RemoveAll(wd)
// Assemble the compiler command, change to the temp folder and capture any errors
stderr := new(bytes.Buffer)
var params []string
if sol.legacy {
params = paramsLegacy
} else {
params = paramsNew
params = append(params, wd)
defer os.Remove(infile.Name())
if _, err := io.WriteString(infile, source); err != nil {
return nil, err
}
if err := infile.Close(); err != nil {
return nil, err
}
compilerOptions := strings.Join(params, " ")
cmd := exec.Command(sol.solcPath, params...)
cmd.Stdin = strings.NewReader(source)
cmd.Stderr = stderr
return CompileSolidity(solc, infile.Name())
}
// CompileSolidity compiles all given Solidity source files.
func CompileSolidity(solc string, sourcefiles ...string) (map[string]*Contract, error) {
if len(sourcefiles) == 0 {
return nil, errors.New("solc: no source ")
}
source, err := slurpFiles(sourcefiles)
if err != nil {
return nil, err
}
if solc == "" {
solc = "solc"
}
var stderr, stdout bytes.Buffer
args := append(solcParams, "--")
cmd := exec.Command(solc, append(args, sourcefiles...)...)
cmd.Stderr = &stderr
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return nil, fmt.Errorf("solc: %v\n%s", err, string(stderr.Bytes()))
return nil, fmt.Errorf("solc: %v\n%s", err, stderr.Bytes())
}
// Sanity check that something was actually built
matches, _ := filepath.Glob(filepath.Join(wd, "*.bin*"))
if len(matches) < 1 {
return nil, fmt.Errorf("solc: no build results found")
var output solcOutput
if err := json.Unmarshal(stdout.Bytes(), &output); err != nil {
return nil, err
}
// Compilation succeeded, assemble and return the contracts
shortVersion := versionRegexp.FindString(output.Version)
// Compilation succeeded, assemble and return the contracts.
contracts := make(map[string]*Contract)
for _, path := range matches {
_, file := filepath.Split(path)
base := strings.Split(file, ".")[0]
// Parse the individual compilation results (code binary, ABI definitions, user and dev docs)
var binary []byte
binext := ".bin"
if sol.legacy {
binext = ".binary"
}
if binary, err = ioutil.ReadFile(filepath.Join(wd, base+binext)); err != nil {
return nil, fmt.Errorf("solc: error reading compiler output for code: %v", err)
}
for name, info := range output.Contracts {
// Parse the individual compilation results.
var abi interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".abi")); err != nil {
return nil, fmt.Errorf("solc: error reading abi definition: %v", err)
} else if err = json.Unmarshal(blob, &abi); err != nil {
return nil, fmt.Errorf("solc: error parsing abi definition: %v", err)
if err := json.Unmarshal([]byte(info.Abi), &abi); err != nil {
return nil, fmt.Errorf("solc: error reading abi definition (%v)", err)
}
var userdoc interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".docuser")); err != nil {
if err := json.Unmarshal([]byte(info.Userdoc), &userdoc); err != nil {
return nil, fmt.Errorf("solc: error reading user doc: %v", err)
} else if err = json.Unmarshal(blob, &userdoc); err != nil {
return nil, fmt.Errorf("solc: error parsing user doc: %v", err)
}
var devdoc interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".docdev")); err != nil {
if err := json.Unmarshal([]byte(info.Devdoc), &devdoc); err != nil {
return nil, fmt.Errorf("solc: error reading dev doc: %v", err)
} else if err = json.Unmarshal(blob, &devdoc); err != nil {
return nil, fmt.Errorf("solc: error parsing dev doc: %v", err)
}
// Assemble the final contract
contracts[base] = &Contract{
Code: "0x" + string(binary),
contracts[name] = &Contract{
Code: "0x" + info.Bin,
Info: ContractInfo{
Source: source,
Language: "Solidity",
LanguageVersion: sol.version,
CompilerVersion: sol.version,
CompilerOptions: compilerOptions,
LanguageVersion: shortVersion,
CompilerVersion: shortVersion,
CompilerOptions: strings.Join(solcParams, " "),
AbiDefinition: abi,
UserDoc: userdoc,
DeveloperDoc: devdoc,
@ -214,12 +173,24 @@ func (sol *Solidity) Compile(source string) (map[string]*Contract, error) {
return contracts, nil
}
func SaveInfo(info *ContractInfo, filename string) (contenthash common.Hash, err error) {
func slurpFiles(files []string) (string, error) {
var concat bytes.Buffer
for _, file := range files {
content, err := ioutil.ReadFile(file)
if err != nil {
return "", err
}
concat.Write(content)
}
return concat.String(), nil
}
// SaveInfo serializes info to the given file and returns its Keccak256 hash.
func SaveInfo(info *ContractInfo, filename string) (common.Hash, error) {
infojson, err := json.Marshal(info)
if err != nil {
return
return common.Hash{}, err
}
contenthash = common.BytesToHash(crypto.Keccak256(infojson))
err = ioutil.WriteFile(filename, infojson, 0600)
return
contenthash := common.BytesToHash(crypto.Keccak256(infojson))
return contenthash, ioutil.WriteFile(filename, infojson, 0600)
}

82
common/compiler/solidity_test.go
View File

@ -26,10 +26,9 @@ import (
"github.com/ethereum/go-ethereum/common"
)
const solcVersion = "0.1.1"
var (
source = `
const (
supportedSolcVersion = "0.3.5"
testSource = `
contract test {
/// @notice Will multiply ` + "`a`" + ` by 7.
function multiply(uint a) returns(uint d) {
@ -37,61 +36,57 @@ contract test {
}
}
`
code = "0x6060604052606d8060116000396000f30060606040526000357c010000000000000000000000000000000000000000000000000000000090048063c6888fa1146037576035565b005b6046600480359060200150605c565b6040518082815260200191505060405180910390f35b60006007820290506068565b91905056"
info = `{"source":"\ncontract test {\n /// @notice Will multiply ` + "`a`" + ` by 7.\n function multiply(uint a) returns(uint d) {\n return a * 7;\n }\n}\n","language":"Solidity","languageVersion":"0.1.1","compilerVersion":"0.1.1","compilerOptions":"--binary file --json-abi file --natspec-user file --natspec-dev file --add-std 1","abiDefinition":[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"type":"function"}],"userDoc":{"methods":{"multiply(uint256)":{"notice":"Will multiply ` + "`a`" + ` by 7."}}},"developerDoc":{"methods":{}}}`
infohash = common.HexToHash("0x9f3803735e7f16120c5a140ab3f02121fd3533a9655c69b33a10e78752cc49b0")
testCode = "0x6060604052602a8060106000396000f3606060405260e060020a6000350463c6888fa18114601a575b005b6007600435026060908152602090f3"
testInfo = `{"source":"\ncontract test {\n /// @notice Will multiply ` + "`a`" + ` by 7.\n function multiply(uint a) returns(uint d) {\n return a * 7;\n }\n}\n","language":"Solidity","languageVersion":"0.1.1","compilerVersion":"0.1.1","compilerOptions":"--binary file --json-abi file --natspec-user file --natspec-dev file --add-std 1","abiDefinition":[{"constant":false,"inputs":[{"name":"a","type":"uint256"}],"name":"multiply","outputs":[{"name":"d","type":"uint256"}],"type":"function"}],"userDoc":{"methods":{"multiply(uint256)":{"notice":"Will multiply ` + "`a`" + ` by 7."}}},"developerDoc":{"methods":{}}}`
)
func TestCompiler(t *testing.T) {
sol, err := New("")
func skipUnsupported(t *testing.T) {
sol, err := SolidityVersion("")
if err != nil {
t.Skipf("solc not found: %v", err)
} else if sol.Version() != solcVersion {
t.Skipf("WARNING: a newer version of solc found (%v, expect %v)", sol.Version(), solcVersion)
}
contracts, err := sol.Compile(source)
if err != nil {
t.Errorf("error compiling source. result %v: %v", contracts, err)
t.Skip(err)
return
}
if sol.Version != supportedSolcVersion {
t.Skipf("unsupported version of solc found (%v, expect %v)", sol.Version, supportedSolcVersion)
}
}
func TestCompiler(t *testing.T) {
skipUnsupported(t)
contracts, err := CompileSolidityString("", testSource)
if err != nil {
t.Fatalf("error compiling source. result %v: %v", contracts, err)
}
if len(contracts) != 1 {
t.Errorf("one contract expected, got %d", len(contracts))
}
if contracts["test"].Code != code {
t.Errorf("wrong code, expected\n%s, got\n%s", code, contracts["test"].Code)
c, ok := contracts["test"]
if !ok {
t.Fatal("info for contract 'test' not present in result")
}
if c.Code != testCode {
t.Errorf("wrong code: expected\n%s, got\n%s", testCode, c.Code)
}
if c.Info.Source != testSource {
t.Error("wrong source")
}
if c.Info.CompilerVersion != supportedSolcVersion {
t.Errorf("wrong version: expected %q, got %q", supportedSolcVersion, c.Info.CompilerVersion)
}
}
func TestCompileError(t *testing.T) {
sol, err := New("")
if err != nil || sol.version != solcVersion {
t.Skip("solc not found: skip")
} else if sol.Version() != solcVersion {
t.Skip("WARNING: skipping due to a newer version of solc found (%v, expect %v)", sol.Version(), solcVersion)
}
contracts, err := sol.Compile(source[2:])
skipUnsupported(t)
contracts, err := CompileSolidityString("", testSource[4:])
if err == nil {
t.Errorf("error expected compiling source. got none. result %v", contracts)
return
}
}
func TestNoCompiler(t *testing.T) {
_, err := New("/path/to/solc")
if err != nil {
t.Logf("solidity quits with error: %v", err)
} else {
t.Errorf("no solc installed, but got no error")
}
t.Logf("error: %v", err)
}
func TestSaveInfo(t *testing.T) {
var cinfo ContractInfo
err := json.Unmarshal([]byte(info), &cinfo)
err := json.Unmarshal([]byte(testInfo), &cinfo)
if err != nil {
t.Errorf("%v", err)
}
@ -105,10 +100,11 @@ func TestSaveInfo(t *testing.T) {
if err != nil {
t.Errorf("error reading '%v': %v", filename, err)
}
if string(got) != info {
t.Errorf("incorrect info.json extracted, expected:\n%s\ngot\n%s", info, string(got))
if string(got) != testInfo {
t.Errorf("incorrect info.json extracted, expected:\n%s\ngot\n%s", testInfo, string(got))
}
if cinfohash != infohash {
t.Errorf("content hash for info is incorrect. expected %v, got %v", infohash.Hex(), cinfohash.Hex())
wantHash := common.HexToHash("0x9f3803735e7f16120c5a140ab3f02121fd3533a9655c69b33a10e78752cc49b0")
if cinfohash != wantHash {
t.Errorf("content hash for info is incorrect. expected %v, got %v", wantHash.Hex(), cinfohash.Hex())
}
}

4
eth/backend.go
View File

@ -31,7 +31,6 @@ import (
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/common/httpclient"
"github.com/ethereum/go-ethereum/common/registrar/ethreg"
"github.com/ethereum/go-ethereum/core"
@ -130,7 +129,6 @@ type Ethereum struct {
autodagquit chan bool
etherbase common.Address
solcPath string
solc *compiler.Solidity
NatSpec bool
PowTest bool
@ -291,7 +289,7 @@ func CreatePoW(config *Config) (*ethash.Ethash, error) {
// APIs returns the collection of RPC services the ethereum package offers.
// NOTE, some of these services probably need to be moved to somewhere else.
func (s *Ethereum) APIs() []rpc.API {
return append(ethapi.GetAPIs(s.apiBackend, &s.solcPath, &s.solc), []rpc.API{
return append(ethapi.GetAPIs(s.apiBackend, s.solcPath), []rpc.API{
{
Namespace: "eth",
Version: "1.0",

2
eth/bind.go
View File

@ -44,7 +44,7 @@ type ContractBackend struct {
// Etheruem object.
func NewContractBackend(eth *Ethereum) *ContractBackend {
return &ContractBackend{
eapi: ethapi.NewPublicEthereumAPI(eth.apiBackend, nil, nil),
eapi: ethapi.NewPublicEthereumAPI(eth.apiBackend),
bcapi: ethapi.NewPublicBlockChainAPI(eth.apiBackend),
txapi: ethapi.NewPublicTransactionPoolAPI(eth.apiBackend),
}

66
internal/ethapi/api.go
View File

@ -20,7 +20,6 @@ import (
"bytes"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"math/big"
"strings"
@ -30,7 +29,6 @@ import (
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -51,13 +49,11 @@ const defaultGas = uint64(90000)
// It offers only methods that operate on public data that is freely available to anyone.
type PublicEthereumAPI struct {
b Backend
solcPath *string
solc **compiler.Solidity
}
// NewPublicEthereumAPI creates a new Etheruem protocol API.
func NewPublicEthereumAPI(b Backend, solcPath *string, solc **compiler.Solidity) *PublicEthereumAPI {
return &PublicEthereumAPI{b, solcPath, solc}
func NewPublicEthereumAPI(b Backend) *PublicEthereumAPI {
return &PublicEthereumAPI{b}
}
// GasPrice returns a suggestion for a gas price.
@ -65,39 +61,6 @@ func (s *PublicEthereumAPI) GasPrice(ctx context.Context) (*big.Int, error) {
return s.b.SuggestPrice(ctx)
}
func (s *PublicEthereumAPI) getSolc() (*compiler.Solidity, error) {
var err error
solc := *s.solc
if solc == nil {
solc, err = compiler.New(*s.solcPath)
}
return solc, err
}
// GetCompilers returns the collection of available smart contract compilers
func (s *PublicEthereumAPI) GetCompilers() ([]string, error) {
solc, err := s.getSolc()
if err == nil && solc != nil {
return []string{"Solidity"}, nil
}
return []string{}, nil
}
// CompileSolidity compiles the given solidity source
func (s *PublicEthereumAPI) CompileSolidity(source string) (map[string]*compiler.Contract, error) {
solc, err := s.getSolc()
if err != nil {
return nil, err
}
if solc == nil {
return nil, errors.New("solc (solidity compiler) not found")
}
return solc.Compile(source)
}
// ProtocolVersion returns the current Ethereum protocol version this node supports
func (s *PublicEthereumAPI) ProtocolVersion() *rpc.HexNumber {
return rpc.NewHexNumber(s.b.ProtocolVersion())
@ -1416,31 +1379,6 @@ func (s *PublicTransactionPoolAPI) Resend(ctx context.Context, tx *Tx, gasPrice,
return common.Hash{}, fmt.Errorf("Transaction %#x not found", tx.Hash)
}
// PrivateAdminAPI is the collection of Etheruem APIs exposed over the private
// admin endpoint.
type PrivateAdminAPI struct {
b Backend
solcPath *string
solc **compiler.Solidity
}
// NewPrivateAdminAPI creates a new API definition for the private admin methods
// of the Ethereum service.
func NewPrivateAdminAPI(b Backend, solcPath *string, solc **compiler.Solidity) *PrivateAdminAPI {
return &PrivateAdminAPI{b, solcPath, solc}
}
// SetSolc sets the Solidity compiler path to be used by the node.
func (api *PrivateAdminAPI) SetSolc(path string) (string, error) {
var err error
*api.solcPath = path
*api.solc, err = compiler.New(path)
if err != nil {
return "", err
}
return (*api.solc).Info(), nil
}
// PublicDebugAPI is the collection of Etheruem APIs exposed over the public
// debugging endpoint.
type PublicDebugAPI struct {

13
internal/ethapi/backend.go
View File

@ -22,7 +22,6 @@ import (
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -69,12 +68,13 @@ type State interface {
GetNonce(ctx context.Context, addr common.Address) (uint64, error)
}
func GetAPIs(apiBackend Backend, solcPath *string, solc **compiler.Solidity) []rpc.API {
return []rpc.API{
func GetAPIs(apiBackend Backend, solcPath string) []rpc.API {
compiler := makeCompilerAPIs(solcPath)
all := []rpc.API{
{
Namespace: "eth",
Version: "1.0",
Service: NewPublicEthereumAPI(apiBackend, solcPath, solc),
Service: NewPublicEthereumAPI(apiBackend),
Public: true,
}, {
Namespace: "eth",
@ -91,10 +91,6 @@ func GetAPIs(apiBackend Backend, solcPath *string, solc **compiler.Solidity) []r
Version: "1.0",
Service: NewPublicTxPoolAPI(apiBackend),
Public: true,
}, {
Namespace: "admin",
Version: "1.0",
Service: NewPrivateAdminAPI(apiBackend, solcPath, solc),
}, {
Namespace: "debug",
Version: "1.0",
@ -116,4 +112,5 @@ func GetAPIs(apiBackend Backend, solcPath *string, solc **compiler.Solidity) []r
Public: false,
},
}
return append(compiler, all...)
}

82
internal/ethapi/solc.go Normal file
View File

@ -0,0 +1,82 @@
// 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 ethapi
import (
"sync"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/rpc"
)
func makeCompilerAPIs(solcPath string) []rpc.API {
c := &compilerAPI{solc: solcPath}
return []rpc.API{
{
Namespace: "eth",
Version: "1.0",
Service: (*PublicCompilerAPI)(c),
Public: true,
},
{
Namespace: "admin",
Version: "1.0",
Service: (*CompilerAdminAPI)(c),
Public: true,
},
}
}
type compilerAPI struct {
// This lock guards the solc path set through the API.
// It also ensures that only one solc process is used at
// any time.
mu sync.Mutex
solc string
}
type CompilerAdminAPI compilerAPI
// SetSolc sets the Solidity compiler path to be used by the node.
func (api *CompilerAdminAPI) SetSolc(path string) (string, error) {
api.mu.Lock()
defer api.mu.Unlock()
info, err := compiler.SolidityVersion(path)
if err != nil {
return "", err
}
api.solc = path
return info.FullVersion, nil
}
type PublicCompilerAPI compilerAPI
// CompileSolidity compiles the given solidity source.
func (api *PublicCompilerAPI) CompileSolidity(source string) (map[string]*compiler.Contract, error) {
api.mu.Lock()
defer api.mu.Unlock()
return compiler.CompileSolidityString(api.solc, source)
}
func (api *PublicCompilerAPI) GetCompilers() ([]string, error) {
api.mu.Lock()
defer api.mu.Unlock()
if _, err := compiler.SolidityVersion(api.solc); err == nil {
return []string{"Solidity"}, nil
}
return []string{}, nil
}