path: root/internal/ethapi/solc.go

// 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
}