100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package api
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/rpc/codec"
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"github.com/ethereum/go-ethereum/rpc/shared"
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"github.com/ethereum/go-ethereum/xeth"
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)
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const (
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Web3ApiVersion = "1.0"
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)
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var (
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// mapping between methods and handlers
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Web3Mapping = map[string]web3handler{
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"web3_sha3": (*web3Api).Sha3,
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"web3_clientVersion": (*web3Api).ClientVersion,
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}
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)
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// web3 callback handler
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type web3handler func(*web3Api, *shared.Request) (interface{}, error)
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// web3 api provider
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type web3Api struct {
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xeth *xeth.XEth
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methods map[string]web3handler
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codec codec.ApiCoder
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}
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// create a new web3 api instance
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func NewWeb3Api(xeth *xeth.XEth, coder codec.Codec) *web3Api {
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return &web3Api{
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xeth: xeth,
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methods: Web3Mapping,
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codec: coder.New(nil),
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}
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}
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// collection with supported methods
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func (self *web3Api) Methods() []string {
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methods := make([]string, len(self.methods))
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i := 0
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for k := range self.methods {
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methods[i] = k
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i++
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}
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return methods
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}
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// Execute given request
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func (self *web3Api) Execute(req *shared.Request) (interface{}, error) {
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if callback, ok := self.methods[req.Method]; ok {
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return callback(self, req)
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}
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return nil, &shared.NotImplementedError{req.Method}
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}
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func (self *web3Api) Name() string {
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return shared.Web3ApiName
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}
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func (self *web3Api) ApiVersion() string {
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return Web3ApiVersion
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}
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// Calculates the sha3 over req.Params.Data
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func (self *web3Api) Sha3(req *shared.Request) (interface{}, error) {
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args := new(Sha3Args)
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if err := self.codec.Decode(req.Params, &args); err != nil {
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return nil, err
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}
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return common.ToHex(crypto.Sha3(common.FromHex(args.Data))), nil
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}
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// returns the xeth client vrsion
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func (self *web3Api) ClientVersion(req *shared.Request) (interface{}, error) {
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return self.xeth.ClientVersion(), nil
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}
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