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common/compiler: simplify solc wrapper

Browse Source 
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
}