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/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/*
For each request type, define the following:
1. RpcRequest "To" method [message.go], which does basic validation and conversion to "Args" type via json.Decoder()
2. json.Decoder() calls "UnmarshalON" defined on each "Args" struct
3. EthereumApi method, taking the "Args" type and replying with an interface to be marshalled to ON
*/
package rpc
import (
"math/big"
"strings"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/xeth"
)
type RpcServer interface {
Start()
Stop()
}
func NewEthereumApi(xeth *xeth.XEth) *EthereumApi {
return &EthereumApi{xeth: xeth}
}
type EthereumApi struct {
xeth *xeth.XEth
}
func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
if args.BlockNumber > 0 {
*reply = p.xeth.BlockByNumber(args.BlockNumber)
} else {
*reply = p.xeth.BlockByHash(args.Hash)
}
return nil
}
func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
result, _ := p.xeth.Transact( /* TODO specify account */ "", args.Recipient, args.Value, args.Gas, args.GasPrice, args.Body)
*reply = result
return nil
}
func (p *EthereumApi) Create(args *NewTxArgs, reply *interface{}) error {
err := args.requirementsContract()
if err != nil {
return err
}
result, _ := p.xeth.Transact( /* TODO specify account */ "", "", args.Value, args.Gas, args.GasPrice, args.Body)
*reply = result
return nil
}
func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
err := args.requirementsPushTx()
if err != nil {
return err
}
result, _ := p.xeth.PushTx(args.Tx)
*reply = result
return nil
}
func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
state := p.xeth.State().SafeGet(args.Address)
var hx string
if strings.Index(args.Key, "0x") == 0 {
hx = string([]byte(args.Key)[2:])
} else {
// Convert the incoming string (which is a bigint) into hex
i, _ := new(big.Int).SetString(args.Key, 10)
hx = ethutil.Bytes2Hex(i.Bytes())
}
rpclogger.Debugf("GetStorageAt(%s, %s)\n", args.Address, hx)
value := state.Storage(ethutil.Hex2Bytes(hx))
*reply = GetStorageAtRes{Address: args.Address, Key: args.Key, Value: value.Str()}
return nil
}
func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
*reply = p.xeth.PeerCount()
return nil
}
func (p *EthereumApi) GetIsListening(reply *interface{}) error {
*reply = p.xeth.IsListening()
return nil
}
func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
*reply = p.xeth.Coinbase()
return nil
}
func (p *EthereumApi) GetIsMining(reply *interface{}) error {
*reply = p.xeth.IsMining()
return nil
}
func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
*reply = p.xeth.TxCountAt(args.Address)
return nil
}
func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
state := p.xeth.State().SafeGet(args.Address)
*reply = BalanceRes{Balance: state.Balance().String(), Address: args.Address}
return nil
}
func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
err := args.requirements()
if err != nil {
return err
}
*reply = p.xeth.CodeAt(args.Address)
return nil
}
func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
// Spec at https://github.com/ethereum/wiki/wiki/Generic-ON-RPC
rpclogger.DebugDetailf("%T %s", req.Params, req.Params)
switch req.Method {
case "eth_coinbase":
return p.GetCoinbase(reply)
case "eth_listening":
return p.GetIsListening(reply)
case "eth_mining":
return p.GetIsMining(reply)
case "eth_peerCount":
return p.GetPeerCount(reply)
case "eth_countAt":
args, err := req.ToGetTxCountArgs()
if err != nil {
return err
}
return p.GetTxCountAt(args, reply)
case "eth_codeAt":
args, err := req.ToGetCodeAtArgs()
if err != nil {
return err
}
return p.GetCodeAt(args, reply)
case "eth_balanceAt":
args, err := req.ToGetBalanceArgs()
if err != nil {
return err
}
return p.GetBalanceAt(args, reply)
case "eth_stateAt":
args, err := req.ToGetStorageArgs()
if err != nil {
return err
}
return p.GetStorageAt(args, reply)
case "eth_blockByNumber", "eth_blockByHash":
args, err := req.ToGetBlockArgs()
if err != nil {
return err
}
return p.GetBlock(args, reply)
default:
return NewErrorResponse(ErrorNotImplemented)
}
rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
return nil
}
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