From 86cfc22c79594bd0d9625650dcbfb60c3e6ba9fe Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= Date: Thu, 17 Mar 2016 19:27:37 +0200 Subject: [PATCH] accounts/abi/bind: constructor, auth utils and various backends --- accounts/abi/abi.go | 46 +++--- accounts/abi/bind/auth.go | 53 +++++++ accounts/abi/bind/backend.go | 196 +---------------------- accounts/abi/bind/backends/nil.go | 46 ++++++ accounts/abi/bind/backends/remote.go | 202 ++++++++++++++++++++++++ accounts/abi/bind/backends/simulated.go | 184 +++++++++++++++++++++ accounts/abi/bind/base.go | 66 +++++++- accounts/abi/bind/bind.go | 177 ++++++++++++++++----- accounts/abi/bind/bind_test.go | 16 +- cmd/abigen/main.go | 17 +- 10 files changed, 736 insertions(+), 267 deletions(-) create mode 100644 accounts/abi/bind/auth.go create mode 100644 accounts/abi/bind/backends/nil.go create mode 100644 accounts/abi/bind/backends/remote.go create mode 100644 accounts/abi/bind/backends/simulated.go diff --git a/accounts/abi/abi.go b/accounts/abi/abi.go index 029d1b102e..91f9700d99 100644 --- a/accounts/abi/abi.go +++ b/accounts/abi/abi.go @@ -30,8 +30,9 @@ import ( // invokable methods. It will allow you to type check function calls and // packs data accordingly. type ABI struct { - Methods map[string]Method - Events map[string]Event + Constructor Method + Methods map[string]Method + Events map[string]Event } // JSON returns a parsed ABI interface and error if it failed. @@ -48,9 +49,7 @@ func JSON(reader io.Reader) (ABI, error) { // tests, tests whether the given input would result in a successful // call. Checks argument list count and matches input to `input`. -func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) { - method := abi.Methods[name] - +func (abi ABI) pack(method Method, args ...interface{}) ([]byte, error) { // variable input is the output appended at the end of packed // output. This is used for strings and bytes types input. var variableInput []byte @@ -61,7 +60,7 @@ func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) { // pack the input packed, err := input.Type.pack(a) if err != nil { - return nil, fmt.Errorf("`%s` %v", name, err) + return nil, fmt.Errorf("`%s` %v", method.Name, err) } // check for a string or bytes input type @@ -91,26 +90,31 @@ func (abi ABI) pack(name string, args ...interface{}) ([]byte, error) { // Method ids are created from the first 4 bytes of the hash of the // methods string signature. (signature = baz(uint32,string32)) func (abi ABI) Pack(name string, args ...interface{}) ([]byte, error) { - method, exist := abi.Methods[name] - if !exist { - return nil, fmt.Errorf("method '%s' not found", name) - } + // Fetch the ABI of the requested method + var method Method - // start with argument count match + if name == "" { + method = abi.Constructor + } else { + m, exist := abi.Methods[name] + if !exist { + return nil, fmt.Errorf("method '%s' not found", name) + } + method = m + } + // Make sure arguments match up and pack them if len(args) != len(method.Inputs) { return nil, fmt.Errorf("argument count mismatch: %d for %d", len(args), len(method.Inputs)) } - - arguments, err := abi.pack(name, args...) + arguments, err := abi.pack(method, args...) if err != nil { return nil, err } - - // Set function id - packed := abi.Methods[name].Id() - packed = append(packed, arguments...) - - return packed, nil + // Pack up the method ID too if not a constructor and return + if name == "" { + return arguments, nil + } + return append(method.Id(), arguments...), nil } // toGoType parses the input and casts it to the proper type defined by the ABI @@ -283,6 +287,10 @@ func (abi *ABI) UnmarshalJSON(data []byte) error { abi.Events = make(map[string]Event) for _, field := range fields { switch field.Type { + case "constructor": + abi.Constructor = Method{ + Inputs: field.Inputs, + } // empty defaults to function according to the abi spec case "function", "": abi.Methods[field.Name] = Method{ diff --git a/accounts/abi/bind/auth.go b/accounts/abi/bind/auth.go new file mode 100644 index 0000000000..e0491497c7 --- /dev/null +++ b/accounts/abi/bind/auth.go @@ -0,0 +1,53 @@ +// 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 . + +package bind + +import ( + "errors" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/types" + "github.com/ethereum/go-ethereum/crypto" +) + +// NewTransactor is a utility method to easily create a transaction signer from +// an encrypted json key file and the associated passphrase. +func NewTransactor(keyjson string, passphrase string) (*TransactOpts, error) { + key, err := crypto.DecryptKey([]byte(keyjson), passphrase) + if err != nil { + return nil, err + } + return NewKeyedTransactor(key), nil +} + +// NewKeyedTransactor is a utility method to easily create a transaction signer +// from a plain go-ethereum crypto key. +func NewKeyedTransactor(key *crypto.Key) *TransactOpts { + return &TransactOpts{ + Account: key.Address, + Signer: func(address common.Address, tx *types.Transaction) (*types.Transaction, error) { + if address != key.Address { + return nil, errors.New("not authorized to sign this account") + } + signature, err := crypto.Sign(tx.SigHash().Bytes(), key.PrivateKey) + if err != nil { + return nil, err + } + return tx.WithSignature(signature) + }, + } +} diff --git a/accounts/abi/bind/backend.go b/accounts/abi/bind/backend.go index fcd1c4d0aa..596e97f1d5 100644 --- a/accounts/abi/bind/backend.go +++ b/accounts/abi/bind/backend.go @@ -17,24 +17,19 @@ package bind import ( - "encoding/json" - "fmt" "math/big" - "sync" - "sync/atomic" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core/types" - "github.com/ethereum/go-ethereum/rlp" - "github.com/ethereum/go-ethereum/rpc" ) // ContractCaller defines the methods needed to allow operating with contract on a read // only basis. type ContractCaller interface { // ContractCall executes an Ethereum contract call with the specified data as - // the input. - ContractCall(contract common.Address, data []byte) ([]byte, error) + // the input. The pending flag requests execution against the pending block, not + // the stable head of the chain. + ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) } // ContractTransactor defines the methods needed to allow operating with contract @@ -50,7 +45,7 @@ type ContractTransactor interface { GasPrice() (*big.Int, error) // GasLimit tries to estimate the gas needed to execute a specific transaction. - GasLimit(sender, contract common.Address, value *big.Int, data []byte) (*big.Int, error) + GasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) // SendTransaction injects the transaction into the pending pool for execution. SendTransaction(*types.Transaction) error @@ -62,186 +57,3 @@ type ContractBackend interface { ContractCaller ContractTransactor } - -// nilBackend implements bind.ContractBackend, but panics on any method call. -// Its sole purpose is to support the binding tests to construct the generated -// wrappers without calling any methods on them. -type nilBackend struct{} - -func (*nilBackend) ContractCall(common.Address, []byte) ([]byte, error) { panic("not implemented") } -func (*nilBackend) SendTransaction(*types.Transaction) error { panic("not implemented") } -func (*nilBackend) AccountNonce(common.Address) (uint64, error) { panic("not implemented") } -func (*nilBackend) GasPrice() (*big.Int, error) { panic("not implemented") } -func (*nilBackend) GasLimit(common.Address, common.Address, *big.Int, []byte) (*big.Int, error) { - panic("not implemented") -} - -// Helper backend for internal tests. Will panic on any invocation! -var NilBackend = new(nilBackend) - -// rpcBackend implements bind.ContractBackend, and acts as the data provider to -// Ethereum contracts bound to Go structs. It uses an RPC connection to delegate -// all its functionality. -// -// Note: The current implementation is a blocking one. This should be replaced -// by a proper async version when a real RPC client is created. -type rpcBackend struct { - client rpc.Client // RPC client connection to interact with an API server - autoid uint32 // ID number to use for the next API request - lock sync.Mutex // Singleton access until we get to request multiplexing -} - -// NewRPCBackend creates a new binding backend to an RPC provider that can be -// used to interact with remote contracts. -func NewRPCBackend(client rpc.Client) ContractBackend { - return &rpcBackend{ - client: client, - } -} - -// request is a JSON RPC request package assembled internally from the client -// method calls. -type request struct { - JsonRpc string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0 - Id int `json:"id"` // Auto incrementing ID number for this request - Method string `json:"method"` // Remote procedure name to invoke on the server - Params []interface{} `json:"params"` // List of parameters to pass through (keep types simple) -} - -// response is a JSON RPC response package sent back from the API server. -type response struct { - JsonRpc string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0 - Id int `json:"id"` // Auto incrementing ID number for this request - Error json.RawMessage `json:"error"` // Any error returned by the remote side - Result json.RawMessage `json:"result"` // Whatever the remote side sends us in reply -} - -// request forwards an API request to the RPC server, and parses the response. -// -// This is currently painfully non-concurrent, but it will have to do until we -// find the time for niceties like this :P -func (backend *rpcBackend) request(method string, params []interface{}) (json.RawMessage, error) { - backend.lock.Lock() - defer backend.lock.Unlock() - - // Ugly hack to serialize an empty list properly - if params == nil { - params = []interface{}{} - } - // Assemble the request object - req := &request{ - JsonRpc: "2.0", - Id: int(atomic.AddUint32(&backend.autoid, 1)), - Method: method, - Params: params, - } - if err := backend.client.Send(req); err != nil { - return nil, err - } - res := new(response) - if err := backend.client.Recv(res); err != nil { - return nil, err - } - if len(res.Error) > 0 { - return nil, fmt.Errorf("remote error: %s", string(res.Error)) - } - return res.Result, nil -} - -// ContractCall implements ContractCaller.ContractCall, delegating the execution of -// a contract call to the remote node, returning the reply to for local processing. -func (b *rpcBackend) ContractCall(contract common.Address, data []byte) ([]byte, error) { - // Pack up the request into an RPC argument - args := struct { - To common.Address `json:"to"` - Data string `json:"data"` - }{ - To: contract, - Data: common.ToHex(data), - } - // Execute the RPC call and retrieve the response - res, err := b.request("eth_call", []interface{}{args, "pending"}) - if err != nil { - return nil, err - } - var hex string - if err := json.Unmarshal(res, &hex); err != nil { - return nil, err - } - // Convert the response back to a Go byte slice and return - return common.FromHex(hex), nil -} - -// AccountNonce implements ContractTransactor.AccountNonce, delegating the -// current account nonce retrieval to the remote node. -func (b *rpcBackend) AccountNonce(account common.Address) (uint64, error) { - res, err := b.request("eth_getTransactionCount", []interface{}{account.Hex(), "pending"}) - if err != nil { - return 0, err - } - var hex string - if err := json.Unmarshal(res, &hex); err != nil { - return 0, err - } - return new(big.Int).SetBytes(common.FromHex(hex)).Uint64(), nil -} - -// GasPrice implements ContractTransactor.GasPrice, delegating the gas price -// oracle request to the remote node. -func (b *rpcBackend) GasPrice() (*big.Int, error) { - res, err := b.request("eth_gasPrice", nil) - if err != nil { - return nil, err - } - var hex string - if err := json.Unmarshal(res, &hex); err != nil { - return nil, err - } - return new(big.Int).SetBytes(common.FromHex(hex)), nil -} - -// GasLimit implements ContractTransactor.GasLimit, delegating the gas estimation -// to the remote node. -func (b *rpcBackend) GasLimit(sender, contract common.Address, value *big.Int, data []byte) (*big.Int, error) { - // Pack up the request into an RPC argument - args := struct { - From common.Address `json:"from"` - To common.Address `json:"to"` - Value *rpc.HexNumber `json:"value"` - Data string `json:"data"` - }{ - From: sender, - To: contract, - Data: common.ToHex(data), - Value: rpc.NewHexNumber(value), - } - // Execute the RPC call and retrieve the response - res, err := b.request("eth_estimateGas", []interface{}{args}) - if err != nil { - return nil, err - } - var hex string - if err := json.Unmarshal(res, &hex); err != nil { - return nil, err - } - // Convert the response back to a Go byte slice and return - return new(big.Int).SetBytes(common.FromHex(hex)), nil -} - -// Transact implements ContractTransactor.SendTransaction, delegating the raw -// transaction injection to the remote node. -func (b *rpcBackend) SendTransaction(tx *types.Transaction) error { - data, err := rlp.EncodeToBytes(tx) - if err != nil { - return err - } - res, err := b.request("eth_sendRawTransaction", []interface{}{common.ToHex(data)}) - if err != nil { - return err - } - var hex string - if err := json.Unmarshal(res, &hex); err != nil { - return err - } - return nil -} diff --git a/accounts/abi/bind/backends/nil.go b/accounts/abi/bind/backends/nil.go new file mode 100644 index 0000000000..8b1f9d63e3 --- /dev/null +++ b/accounts/abi/bind/backends/nil.go @@ -0,0 +1,46 @@ +// 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 . + +package backends + +import ( + "math/big" + + "github.com/ethereum/go-ethereum/accounts/abi/bind" + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/types" +) + +// nilBackend implements bind.ContractBackend, but panics on any method call. +// Its sole purpose is to support the binding tests to construct the generated +// wrappers without calling any methods on them. +type nilBackend struct{} + +func (*nilBackend) ContractCall(common.Address, []byte, bool) ([]byte, error) { + panic("not implemented") +} +func (*nilBackend) GasLimit(common.Address, *common.Address, *big.Int, []byte) (*big.Int, error) { + panic("not implemented") +} +func (*nilBackend) GasPrice() (*big.Int, error) { panic("not implemented") } +func (*nilBackend) AccountNonce(common.Address) (uint64, error) { panic("not implemented") } +func (*nilBackend) SendTransaction(*types.Transaction) error { panic("not implemented") } + +// NewNilBackend creates a new binding backend that can be used for instantiation +// but will panic on any invocation. Its sole purpose is to help testing. +func NewNilBackend() bind.ContractBackend { + return new(nilBackend) +} diff --git a/accounts/abi/bind/backends/remote.go b/accounts/abi/bind/backends/remote.go new file mode 100644 index 0000000000..7177809bbe --- /dev/null +++ b/accounts/abi/bind/backends/remote.go @@ -0,0 +1,202 @@ +// 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 . + +package backends + +import ( + "encoding/json" + "fmt" + "math/big" + "sync" + "sync/atomic" + + "github.com/ethereum/go-ethereum/accounts/abi/bind" + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/types" + "github.com/ethereum/go-ethereum/rlp" + "github.com/ethereum/go-ethereum/rpc" +) + +// rpcBackend implements bind.ContractBackend, and acts as the data provider to +// Ethereum contracts bound to Go structs. It uses an RPC connection to delegate +// all its functionality. +// +// Note: The current implementation is a blocking one. This should be replaced +// by a proper async version when a real RPC client is created. +type rpcBackend struct { + client rpc.Client // RPC client connection to interact with an API server + autoid uint32 // ID number to use for the next API request + lock sync.Mutex // Singleton access until we get to request multiplexing +} + +// NewRPCBackend creates a new binding backend to an RPC provider that can be +// used to interact with remote contracts. +func NewRPCBackend(client rpc.Client) bind.ContractBackend { + return &rpcBackend{ + client: client, + } +} + +// request is a JSON RPC request package assembled internally from the client +// method calls. +type request struct { + JsonRpc string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0 + Id int `json:"id"` // Auto incrementing ID number for this request + Method string `json:"method"` // Remote procedure name to invoke on the server + Params []interface{} `json:"params"` // List of parameters to pass through (keep types simple) +} + +// response is a JSON RPC response package sent back from the API server. +type response struct { + JsonRpc string `json:"jsonrpc"` // Version of the JSON RPC protocol, always set to 2.0 + Id int `json:"id"` // Auto incrementing ID number for this request + Error json.RawMessage `json:"error"` // Any error returned by the remote side + Result json.RawMessage `json:"result"` // Whatever the remote side sends us in reply +} + +// request forwards an API request to the RPC server, and parses the response. +// +// This is currently painfully non-concurrent, but it will have to do until we +// find the time for niceties like this :P +func (backend *rpcBackend) request(method string, params []interface{}) (json.RawMessage, error) { + backend.lock.Lock() + defer backend.lock.Unlock() + + // Ugly hack to serialize an empty list properly + if params == nil { + params = []interface{}{} + } + // Assemble the request object + req := &request{ + JsonRpc: "2.0", + Id: int(atomic.AddUint32(&backend.autoid, 1)), + Method: method, + Params: params, + } + if err := backend.client.Send(req); err != nil { + return nil, err + } + res := new(response) + if err := backend.client.Recv(res); err != nil { + return nil, err + } + if len(res.Error) > 0 { + return nil, fmt.Errorf("remote error: %s", string(res.Error)) + } + return res.Result, nil +} + +// ContractCall implements ContractCaller.ContractCall, delegating the execution of +// a contract call to the remote node, returning the reply to for local processing. +func (b *rpcBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) { + // Pack up the request into an RPC argument + args := struct { + To common.Address `json:"to"` + Data string `json:"data"` + }{ + To: contract, + Data: common.ToHex(data), + } + // Execute the RPC call and retrieve the response + block := "latest" + if pending { + block = "pending" + } + res, err := b.request("eth_call", []interface{}{args, block}) + if err != nil { + return nil, err + } + var hex string + if err := json.Unmarshal(res, &hex); err != nil { + return nil, err + } + // Convert the response back to a Go byte slice and return + return common.FromHex(hex), nil +} + +// AccountNonce implements ContractTransactor.AccountNonce, delegating the +// current account nonce retrieval to the remote node. +func (b *rpcBackend) AccountNonce(account common.Address) (uint64, error) { + res, err := b.request("eth_getTransactionCount", []interface{}{account.Hex(), "pending"}) + if err != nil { + return 0, err + } + var hex string + if err := json.Unmarshal(res, &hex); err != nil { + return 0, err + } + return new(big.Int).SetBytes(common.FromHex(hex)).Uint64(), nil +} + +// GasPrice implements ContractTransactor.GasPrice, delegating the gas price +// oracle request to the remote node. +func (b *rpcBackend) GasPrice() (*big.Int, error) { + res, err := b.request("eth_gasPrice", nil) + if err != nil { + return nil, err + } + var hex string + if err := json.Unmarshal(res, &hex); err != nil { + return nil, err + } + return new(big.Int).SetBytes(common.FromHex(hex)), nil +} + +// GasLimit implements ContractTransactor.GasLimit, delegating the gas estimation +// to the remote node. +func (b *rpcBackend) GasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) { + // Pack up the request into an RPC argument + args := struct { + From common.Address `json:"from"` + To *common.Address `json:"to"` + Value *rpc.HexNumber `json:"value"` + Data string `json:"data"` + }{ + From: sender, + To: contract, + Data: common.ToHex(data), + Value: rpc.NewHexNumber(value), + } + // Execute the RPC call and retrieve the response + res, err := b.request("eth_estimateGas", []interface{}{args}) + if err != nil { + return nil, err + } + var hex string + if err := json.Unmarshal(res, &hex); err != nil { + return nil, err + } + // Convert the response back to a Go byte slice and return + return new(big.Int).SetBytes(common.FromHex(hex)), nil +} + +// Transact implements ContractTransactor.SendTransaction, delegating the raw +// transaction injection to the remote node. +func (b *rpcBackend) SendTransaction(tx *types.Transaction) error { + data, err := rlp.EncodeToBytes(tx) + if err != nil { + return err + } + res, err := b.request("eth_sendRawTransaction", []interface{}{common.ToHex(data)}) + if err != nil { + return err + } + var hex string + if err := json.Unmarshal(res, &hex); err != nil { + return err + } + return nil +} diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go new file mode 100644 index 0000000000..17a0ed7fe7 --- /dev/null +++ b/accounts/abi/bind/backends/simulated.go @@ -0,0 +1,184 @@ +// 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 . + +package backends + +import ( + "math/big" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core" + "github.com/ethereum/go-ethereum/core/state" + "github.com/ethereum/go-ethereum/core/types" + "github.com/ethereum/go-ethereum/ethdb" + "github.com/ethereum/go-ethereum/event" +) + +// SimulatedBackend implements bind.ContractBackend, simulating a blockchain in +// the background. Its main purpose is to allow easily testing contract bindings. +type SimulatedBackend struct { + database ethdb.Database // In memory database to store our testing data + blockchain *core.BlockChain // Ethereum blockchain to handle the consensus + + pendingBlock *types.Block // Currently pending block that will be imported on request + pendingState *state.StateDB // Currently pending state that will be the active on on request +} + +// NewSimulatedBackend creates a new binding backend using a simulated blockchain +// for testing purposes. +func NewSimulatedBackend(accounts ...core.GenesisAccount) *SimulatedBackend { + database, _ := ethdb.NewMemDatabase() + core.WriteGenesisBlockForTesting(database, accounts...) + blockchain, _ := core.NewBlockChain(database, new(core.FakePow), new(event.TypeMux)) + + backend := &SimulatedBackend{ + database: database, + blockchain: blockchain, + } + backend.Rollback() + + return backend +} + +// Commit imports all the pending transactions as a single block and starts a +// fresh new state. +func (b *SimulatedBackend) Commit() { + if _, err := b.blockchain.InsertChain([]*types.Block{b.pendingBlock}); err != nil { + panic(err) // This cannot happen unless the simulator is wrong, fail in that case + } + b.Rollback() +} + +// Rollback aborts all pending transactions, reverting to the last committed state. +func (b *SimulatedBackend) Rollback() { + blocks, _ := core.GenerateChain(b.blockchain.CurrentBlock(), b.database, 1, func(int, *core.BlockGen) {}) + + b.pendingBlock = blocks[0] + b.pendingState, _ = state.New(b.pendingBlock.Root(), b.database) +} + +// ContractCall implements ContractCaller.ContractCall, executing the specified +// contract with the given input data. +func (b *SimulatedBackend) ContractCall(contract common.Address, data []byte, pending bool) ([]byte, error) { + // Create a copy of the current state db to screw around with + var ( + block *types.Block + statedb *state.StateDB + ) + if pending { + block, statedb = b.pendingBlock, b.pendingState + } else { + block = b.blockchain.CurrentBlock() + statedb, _ = b.blockchain.State() + } + statedb = statedb.Copy() + + // Set infinite balance to the a fake caller account + from := statedb.GetOrNewStateObject(common.Address{}) + from.SetBalance(common.MaxBig) + + // Assemble the call invocation to measure the gas usage + msg := callmsg{ + from: from, + to: &contract, + gasPrice: new(big.Int), + gasLimit: common.MaxBig, + value: new(big.Int), + data: data, + } + // Execute the call and return + vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header()) + gaspool := new(core.GasPool).AddGas(common.MaxBig) + + out, _, err := core.ApplyMessage(vmenv, msg, gaspool) + return out, err +} + +// AccountNonce implements ContractTransactor.AccountNonce, retrieving the nonce +// currently pending for the account. +func (b *SimulatedBackend) AccountNonce(account common.Address) (uint64, error) { + return b.pendingState.GetOrNewStateObject(account).Nonce(), nil +} + +// GasPrice implements ContractTransactor.GasPrice. Since the simulated chain +// doens't have miners, we just return a gas price of 1 for any call. +func (b *SimulatedBackend) GasPrice() (*big.Int, error) { + return big.NewInt(1), nil +} + +// GasLimit implements ContractTransactor.GasLimit, executing the requested code +// against the currently pending block/state and returning the used gas. +func (b *SimulatedBackend) GasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) { + // Create a copy of the currently pending state db to screw around with + var ( + block = b.pendingBlock + statedb = b.pendingState.Copy() + ) + + // Set infinite balance to the a fake caller account + from := statedb.GetOrNewStateObject(sender) + from.SetBalance(common.MaxBig) + + // Assemble the call invocation to measure the gas usage + msg := callmsg{ + from: from, + to: contract, + gasPrice: new(big.Int), + gasLimit: common.MaxBig, + value: value, + data: data, + } + // Execute the call and return + vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header()) + gaspool := new(core.GasPool).AddGas(common.MaxBig) + + _, gas, err := core.ApplyMessage(vmenv, msg, gaspool) + return gas, err +} + +// Transact implements ContractTransactor.SendTransaction, delegating the raw +// transaction injection to the remote node. +func (b *SimulatedBackend) SendTransaction(tx *types.Transaction) error { + blocks, _ := core.GenerateChain(b.blockchain.CurrentBlock(), b.database, 1, func(number int, block *core.BlockGen) { + for _, tx := range b.pendingBlock.Transactions() { + block.AddTx(tx) + } + block.AddTx(tx) + }) + b.pendingBlock = blocks[0] + b.pendingState, _ = state.New(b.pendingBlock.Root(), b.database) + + return nil +} + +// callmsg implements core.Message to allow passing it as a transaction simulator. +type callmsg struct { + from *state.StateObject + to *common.Address + gasLimit *big.Int + gasPrice *big.Int + value *big.Int + data []byte +} + +func (m callmsg) From() (common.Address, error) { return m.from.Address(), nil } +func (m callmsg) FromFrontier() (common.Address, error) { return m.from.Address(), nil } +func (m callmsg) Nonce() uint64 { return m.from.Nonce() } +func (m callmsg) To() *common.Address { return m.to } +func (m callmsg) GasPrice() *big.Int { return m.gasPrice } +func (m callmsg) Gas() *big.Int { return m.gasLimit } +func (m callmsg) Value() *big.Int { return m.value } +func (m callmsg) Data() []byte { return m.data } diff --git a/accounts/abi/bind/base.go b/accounts/abi/bind/base.go index 75e3c1d2d0..e9e35fbcb2 100644 --- a/accounts/abi/bind/base.go +++ b/accounts/abi/bind/base.go @@ -24,14 +24,21 @@ import ( "github.com/ethereum/go-ethereum/accounts/abi" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core/types" + "github.com/ethereum/go-ethereum/crypto" ) // SignerFn is a signer function callback when a contract requires a method to // sign the transaction before submission. type SignerFn func(common.Address, *types.Transaction) (*types.Transaction, error) -// AuthOpts is the authorization data required to create a valid Ethereum transaction. -type AuthOpts struct { +// CallOpts is the collection of options to fine tune a contract call request. +type CallOpts struct { + Pending bool // Whether to operate on the pending state or the last known one +} + +// TransactOpts is the collection of authorization data required to create a +// valid Ethereum transaction. +type TransactOpts struct { Account common.Address // Ethereum account to send the transaction from Nonce *big.Int // Nonce to use for the transaction execution (nil = use pending state) Signer SignerFn // Method to use for signing the transaction (mandatory) @@ -62,16 +69,43 @@ func NewBoundContract(address common.Address, abi abi.ABI, caller ContractCaller } } +// DeployContract deploys a contract onto the Ethereum blockchain and binds the +// deployment address with a Go wrapper. +func DeployContract(opts *TransactOpts, abi abi.ABI, bytecode []byte, backend ContractBackend, params ...interface{}) (common.Address, *types.Transaction, *BoundContract, error) { + // Sanity check the authorization options + if opts == nil { + return common.Address{}, nil, nil, errors.New("transaction options missing") + } + // Otherwise try to deploy the contract + c := NewBoundContract(common.Address{}, abi, backend.(ContractCaller), backend.(ContractTransactor)) + + input, err := c.abi.Pack("", params...) + if err != nil { + return common.Address{}, nil, nil, err + } + tx, err := c.transact(opts, nil, append(bytecode, input...)) + if err != nil { + return common.Address{}, nil, nil, err + } + c.address = crypto.CreateAddress(opts.Account, tx.Nonce()) + return c.address, tx, c, nil +} + // Call invokes the (constant) contract method with params as input values and // sets the output to result. The result type might be a single field for simple // returns, a slice of interfaces for anonymous returns and a struct for named // returns. -func (c *BoundContract) Call(result interface{}, method string, params ...interface{}) error { +func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string, params ...interface{}) error { + // Don't crash on a lazy user + if opts == nil { + opts = new(CallOpts) + } + // Pack the input, call and unpack the results input, err := c.abi.Pack(method, params...) if err != nil { return err } - output, err := c.caller.ContractCall(c.address, input) + output, err := c.caller.ContractCall(c.address, input, opts.Pending) if err != nil { return err } @@ -80,11 +114,24 @@ func (c *BoundContract) Call(result interface{}, method string, params ...interf // Transact invokes the (paid) contract method with params as input values and // value as the fund transfer to the contract. -func (c *BoundContract) Transact(opts *AuthOpts, method string, params ...interface{}) (*types.Transaction, error) { +func (c *BoundContract) Transact(opts *TransactOpts, method string, params ...interface{}) (*types.Transaction, error) { + // Sanity check the authorization options + if opts == nil { + return nil, errors.New("transaction options missing") + } + // Otherwise pack up the parameters and invoke the contract input, err := c.abi.Pack(method, params...) if err != nil { return nil, err } + return c.transact(opts, &c.address, input) +} + +// transact executes an actual transaction invocation, first deriving any missing +// authorization fields, and then scheduling the transaction for execution. +func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, input []byte) (*types.Transaction, error) { + var err error + // Ensure a valid value field and resolve the account nonce value := opts.Value if value == nil { @@ -109,13 +156,18 @@ func (c *BoundContract) Transact(opts *AuthOpts, method string, params ...interf } gasLimit := opts.GasLimit if gasLimit == nil { - gasLimit, err = c.transactor.GasLimit(opts.Account, c.address, value, input) + gasLimit, err = c.transactor.GasLimit(opts.Account, contract, value, input) if err != nil { return nil, fmt.Errorf("failed to exstimate gas needed: %v", err) } } // Create the transaction, sign it and schedule it for execution - rawTx := types.NewTransaction(nonce, c.address, value, gasLimit, gasPrice, input) + var rawTx *types.Transaction + if contract == nil { + rawTx = types.NewContractCreation(nonce, value, gasLimit, gasPrice, input) + } else { + rawTx = types.NewTransaction(nonce, c.address, value, gasLimit, gasPrice, input) + } if opts.Signer == nil { return nil, errors.New("no signer to authorize the transaction with") } diff --git a/accounts/abi/bind/bind.go b/accounts/abi/bind/bind.go index bef75a158b..5bd230d0df 100644 --- a/accounts/abi/bind/bind.go +++ b/accounts/abi/bind/bind.go @@ -31,16 +31,18 @@ import ( // to be used as is in client code, but rather as an intermediate struct which // enforces compile time type safety and naming convention opposed to having to // manually maintain hard coded strings that break on runtime. -func Bind(jsonABI string, pkg string, kind string) (string, error) { +func Bind(abijson string, bytecode string, pkg string, kind string) (string, error) { // Parse the actual ABI to generate the binding for - abi, err := abi.JSON(strings.NewReader(jsonABI)) + abi, err := abi.JSON(strings.NewReader(abijson)) if err != nil { return "", err } // Generate the contract type, fields and methods code := new(bytes.Buffer) kind = strings.ToUpper(kind[:1]) + kind[1:] - fmt.Fprintf(code, "%s\n", bindContract(kind, jsonABI)) + + fmt.Fprintf(code, "%s\n", bindContract(kind, strings.TrimSpace(abijson))) + fmt.Fprintf(code, "%s\n", bindConstructor(kind, strings.TrimSpace(bytecode), abi.Constructor)) methods := make([]string, 0, len(abi.Methods)) for name, _ := range abi.Methods { @@ -54,12 +56,14 @@ func Bind(jsonABI string, pkg string, kind string) (string, error) { // Format the code with goimports and return buffer := new(bytes.Buffer) + fmt.Fprintf(buffer, "// This file is an automatically generated Go binding based on the contract ABI\n") + fmt.Fprintf(buffer, "// defined in %sABI. Do not modify as any change will likely be lost!\n\n", kind) fmt.Fprintf(buffer, "package %s\n\n", pkg) fmt.Fprintf(buffer, "%s\n\n", string(code.Bytes())) blob, err := imports.Process("", buffer.Bytes(), nil) if err != nil { - return "", err + return "", fmt.Errorf("%v\n%s", err, code) } return string(blob), nil } @@ -67,13 +71,13 @@ func Bind(jsonABI string, pkg string, kind string) (string, error) { // bindContract generates the basic wrapper code for interacting with an Ethereum // contract via the abi package. All contract methods will call into the generic // ones generated here. -func bindContract(kind string, abi string) string { +func bindContract(kind string, abijson string) string { code := "" // Generate the hard coded ABI used for Ethereum interaction - code += fmt.Sprintf("// Ethereum ABI used to generate the binding from.\nconst %sABI = `%s`\n\n", kind, strings.TrimSpace(abi)) + code += fmt.Sprintf("// Ethereum ABI used to generate the binding from.\nconst %sABI = `%s`\n\n", kind, abijson) - // Generate the Go struct with all the maintenance fields + // Generate the high level contract wrapper types code += fmt.Sprintf("// %s is an auto generated Go binding around an Ethereum contract.\n", kind) code += fmt.Sprintf("type %s struct {\n", kind) code += fmt.Sprintf(" %sCaller // Read-only binding to the contract\n", kind) @@ -82,61 +86,122 @@ func bindContract(kind string, abi string) string { code += fmt.Sprintf("// %sCaller is an auto generated read-only Go binding around an Ethereum contract.\n", kind) code += fmt.Sprintf("type %sCaller struct {\n", kind) - code += fmt.Sprintf(" common *common%s // Contract binding common to callers and transactors\n", kind) + code += fmt.Sprintf(" contract *bind.BoundContract // Generic contract wrapper for the low level calls\n") code += fmt.Sprintf("}\n\n") code += fmt.Sprintf("// %sTransactor is an auto generated write-only Go binding around an Ethereum contract.\n", kind) code += fmt.Sprintf("type %sTransactor struct {\n", kind) - code += fmt.Sprintf(" common *common%s // Contract binding common to callers and transactors\n", kind) + code += fmt.Sprintf(" contract *bind.BoundContract // Generic contract wrapper for the low level calls\n") code += fmt.Sprintf("}\n\n") - code += fmt.Sprintf("// common%s is an auto generated Go binding around an Ethereum contract.\n", kind) - code += fmt.Sprintf("type common%s struct {\n", kind) - code += fmt.Sprintf(" contract *bind.BoundContract // Generic contract wrapper for the low level calls\n") + // Generate the high level contract session wrapper types + code += fmt.Sprintf("// %sSession is an auto generated Go binding around an Ethereum contract,\n// with pre-set call and transact options.\n", kind) + code += fmt.Sprintf("type %sSession struct {\n", kind) + code += fmt.Sprintf(" Contract *%s // Generic contract binding to set the session for\n", kind) + code += fmt.Sprintf(" CallOpts bind.CallOpts // Call options to use throughout this session\n") + code += fmt.Sprintf(" TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session\n") + code += fmt.Sprintf("}\n\n") + + code += fmt.Sprintf("// %sCallerSession is an auto generated read-only Go binding around an Ethereum contract,\n// with pre-set call options.\n", kind) + code += fmt.Sprintf("type %sCallerSession struct {\n", kind) + code += fmt.Sprintf(" Contract *%sCaller // Generic contract caller binding to set the session for\n", kind) + code += fmt.Sprintf(" CallOpts bind.CallOpts // Call options to use throughout this session\n") + code += fmt.Sprintf("}\n\n") + + code += fmt.Sprintf("// %sTransactorSession is an auto generated write-only Go binding around an Ethereum contract,\n// with pre-set transact options.\n", kind) + code += fmt.Sprintf("type %sTransactorSession struct {\n", kind) + code += fmt.Sprintf(" Contract *%sTransactor // Generic contract transactor binding to set the session for\n", kind) + code += fmt.Sprintf(" TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session\n") code += fmt.Sprintf("}\n\n") // Generate the constructor to create a bound contract code += fmt.Sprintf("// New%s creates a new instance of %s, bound to a specific deployed contract.\n", kind, kind) code += fmt.Sprintf("func New%s(address common.Address, backend bind.ContractBackend) (*%s, error) {\n", kind, kind) - code += fmt.Sprintf(" common, err := newCommon%s(address, backend.(bind.ContractCaller), backend.(bind.ContractTransactor))\n", kind) + code += fmt.Sprintf(" contract, err := bind%s(address, backend.(bind.ContractCaller), backend.(bind.ContractTransactor))\n", kind) code += fmt.Sprintf(" if err != nil {\n") code += fmt.Sprintf(" return nil, err\n") code += fmt.Sprintf(" }\n") - code += fmt.Sprintf(" return &%s{%sCaller: %sCaller{common: common}, %sTransactor: %sTransactor{common: common}}, nil\n", kind, kind, kind, kind, kind) + code += fmt.Sprintf(" return &%s{%sCaller: %sCaller{contract: contract}, %sTransactor: %sTransactor{contract: contract}}, nil\n", kind, kind, kind, kind, kind) code += fmt.Sprintf("}\n\n") code += fmt.Sprintf("// New%sCaller creates a new read-only instance of %s, bound to a specific deployed contract.\n", kind, kind) code += fmt.Sprintf("func New%sCaller(address common.Address, caller bind.ContractCaller) (*%sCaller, error) {\n", kind, kind) - code += fmt.Sprintf(" common, err := newCommon%s(address, caller, nil)\n", kind) + code += fmt.Sprintf(" contract, err := bind%s(address, caller, nil)\n", kind) code += fmt.Sprintf(" if err != nil {\n") code += fmt.Sprintf(" return nil, err\n") code += fmt.Sprintf(" }\n") - code += fmt.Sprintf(" return &%sCaller{common: common}, nil\n", kind) + code += fmt.Sprintf(" return &%sCaller{contract: contract}, nil\n", kind) code += fmt.Sprintf("}\n\n") code += fmt.Sprintf("// New%sTransactor creates a new write-only instance of %s, bound to a specific deployed contract.\n", kind, kind) code += fmt.Sprintf("func New%sTransactor(address common.Address, transactor bind.ContractTransactor) (*%sTransactor, error) {\n", kind, kind) - code += fmt.Sprintf(" common, err := newCommon%s(address, nil, transactor)\n", kind) + code += fmt.Sprintf(" contract, err := bind%s(address, nil, transactor)\n", kind) code += fmt.Sprintf(" if err != nil {\n") code += fmt.Sprintf(" return nil, err\n") code += fmt.Sprintf(" }\n") - code += fmt.Sprintf(" return &%sTransactor{common: common}, nil\n", kind) + code += fmt.Sprintf(" return &%sTransactor{contract: contract}, nil\n", kind) code += fmt.Sprintf("}\n\n") - code += fmt.Sprintf("// newCommon%s creates an internal instance of %s, bound to a specific deployed contract.\n", kind, kind) - code += fmt.Sprintf("func newCommon%s(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor) (*common%s, error) {\n", kind, kind) + code += fmt.Sprintf("// bind%s binds a generic wrapper to an already deployed contract.\n", kind) + code += fmt.Sprintf("func bind%s(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor) (*bind.BoundContract, error) {\n", kind) code += fmt.Sprintf(" parsed, err := abi.JSON(strings.NewReader(%sABI))\n", kind) code += fmt.Sprintf(" if err != nil {\n") code += fmt.Sprintf(" return nil, err\n") code += fmt.Sprintf(" }\n") - code += fmt.Sprintf(" return &common%s{\n", kind) - code += fmt.Sprintf(" contract: bind.NewBoundContract(address, parsed, caller, transactor),\n") - code += fmt.Sprintf(" }, nil\n") + code += fmt.Sprintf(" return bind.NewBoundContract(address, parsed, caller, transactor), nil\n") code += fmt.Sprintf("}") return code } +// bindConstructor +func bindConstructor(kind string, bytecode string, constructor abi.Method) string { + // If no byte code was supplied, we cannot deploy + if bytecode == "" { + return "" + } + // Otherwise store the bytecode into a global constant + code := fmt.Sprintf("// Ethereum VM bytecode used for deploying new contracts.\nconst %sBin = `%s`\n\n", kind, bytecode) + + // Generate the argument list for the constructor + args := make([]string, 0, len(constructor.Inputs)) + for i, arg := range constructor.Inputs { + param := arg.Name + if param == "" { + param = fmt.Sprintf("arg%d", i) + } + args = append(args, fmt.Sprintf("%s %s", param, bindType(arg.Type))) + } + arglist := "" + if len(args) > 0 { + arglist = "," + strings.Join(args, ",") + } + // Generate the cal parameter list for the dpeloyer + params := make([]string, len(args)) + for i, param := range args { + params[i] = strings.Split(param, " ")[0] + } + paramlist := "" + if len(params) > 0 { + paramlist = "," + strings.Join(params, ",") + } + // And generate the global deployment function + code += fmt.Sprintf("// Deploy%s deploys a new contract, binding an instance of %s to it.\n", kind, kind) + code += fmt.Sprintf("func Deploy%s(auth *bind.TransactOpts, backend bind.ContractBackend %s) (common.Address, *types.Transaction, *%s, error) {\n", kind, arglist, kind) + code += fmt.Sprintf(" parsed, err := abi.JSON(strings.NewReader(%sABI))\n", kind) + code += fmt.Sprintf(" if err != nil {\n") + code += fmt.Sprintf(" return common.Address{}, nil, nil, err\n") + code += fmt.Sprintf(" }\n") + code += fmt.Sprintf(" address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(%sBin), backend %s)\n", kind, paramlist) + code += fmt.Sprintf(" if err != nil {\n") + code += fmt.Sprintf(" return common.Address{}, nil, nil, err\n") + code += fmt.Sprintf(" }\n") + code += fmt.Sprintf(" return address, tx, &%s{%sCaller: %sCaller{contract: contract}, %sTransactor: %sTransactor{contract: contract}}, nil\n", kind, kind, kind, kind, kind) + code += fmt.Sprintf("}\n\n") + + return code +} + // bindMethod func bindMethod(kind string, method abi.Method) string { var ( @@ -163,13 +228,55 @@ func bindMethod(kind string, method abi.Method) string { docs += fmt.Sprintf("// \n") docs += fmt.Sprintf("// Solidity: %s", strings.TrimPrefix(method.String(), "function ")) + // Generate the passthrough argument list for sessions + params := make([]string, len(args)) + for i, param := range args { + params[i] = strings.Split(param, " ")[0] + } + sessargs := "" + if len(params) > 0 { + sessargs = "," + strings.Join(params, ",") + } // Generate the method itself for both the read/write version and the combo too code := fmt.Sprintf("%s\n", prologue) if method.Const { - code += fmt.Sprintf("%s\nfunc (_%s *%sCaller) %s(%s) (%s) {\n%s\n}\n", docs, kind, kind, name, strings.Join(args, ","), strings.Join(returns, ","), bindCallBody(kind, method.Name, args, returns)) + // Create the main call implementation + callargs := append([]string{"opts *bind.CallOpts"}, args...) + + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sCaller) %s(%s) (%s) {\n", kind, kind, name, strings.Join(callargs, ","), strings.Join(returns, ",")) + code += fmt.Sprintf(" %s\n", bindCallBody(kind, method.Name, callargs, returns)) + code += fmt.Sprintf("}\n\n") + + // Create the wrapping session call implementation + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sSession) %s(%s) (%s) {\n", kind, kind, name, strings.Join(args, ","), strings.Join(returns, ",")) + code += fmt.Sprintf(" return _%s.Contract.%s(&_%s.CallOpts %s)\n", kind, name, kind, sessargs) + code += fmt.Sprintf("}\n\n") + + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sCallerSession) %s(%s) (%s) {\n", kind, kind, name, strings.Join(args, ","), strings.Join(returns, ",")) + code += fmt.Sprintf(" return _%s.Contract.%s(&_%s.CallOpts %s)\n", kind, name, kind, sessargs) + code += fmt.Sprintf("}\n\n") } else { - args = append([]string{"auth *bind.AuthOpts"}, args...) - code += fmt.Sprintf("%s\nfunc (_%s *%sTransactor) %s(%s) (*types.Transaction, error) {\n%s\n}\n", docs, kind, kind, name, strings.Join(args, ","), bindTransactionBody(kind, method.Name, args)) + // Create the main transaction implementation + txargs := append([]string{"opts *bind.TransactOpts"}, args...) + + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sTransactor) %s(%s) (*types.Transaction, error) {\n", kind, kind, name, strings.Join(txargs, ",")) + code += fmt.Sprintf(" %s\n", bindTransactionBody(kind, method.Name, txargs)) + code += fmt.Sprintf("}\n\n") + + // Create the wrapping session call implementation + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sSession) %s(%s) (*types.Transaction, error) {\n", kind, kind, name, strings.Join(args, ",")) + code += fmt.Sprintf(" return _%s.Contract.%s(&_%s.TransactOpts %s)\n", kind, name, kind, sessargs) + code += fmt.Sprintf("}\n\n") + + code += fmt.Sprintf("%s\n", docs) + code += fmt.Sprintf("func (_%s *%sTransactorSession) %s(%s) (*types.Transaction, error) {\n", kind, kind, name, strings.Join(args, ",")) + code += fmt.Sprintf(" return _%s.Contract.%s(&_%s.TransactOpts %s)\n", kind, name, kind, sessargs) + code += fmt.Sprintf("}\n\n") } return code } @@ -264,7 +371,7 @@ func bindCallBody(kind string, method string, params []string, returns []string) name := fmt.Sprintf("ret%d", i) rets = append(rets, name) - body += fmt.Sprintf("%s = new(%s)\n", name, strings.TrimPrefix(kind, "*")) + body += fmt.Sprintf("%s = new(%s)\n", name, kind) } body += ")\n" } @@ -274,8 +381,8 @@ func bindCallBody(kind string, method string, params []string, returns []string) result = "[]interface{}{" + result + "}" } // Extract the parameter list into a flat variable name list - inputs := make([]string, len(params)) - for i, param := range params { + inputs := make([]string, len(params)-1) // Omit the call options + for i, param := range params[1:] { inputs[i] = strings.Split(param, " ")[0] } input := "" @@ -283,15 +390,11 @@ func bindCallBody(kind string, method string, params []string, returns []string) input = "," + strings.Join(inputs, ",") } // Request executing the contract call and return the results with the errors - body += fmt.Sprintf("err := _%s.common.contract.Call(%s, \"%s\" %s)\n", kind, result, method, input) + body += fmt.Sprintf("err := _%s.contract.Call(opts, %s, \"%s\" %s)\n", kind, result, method, input) outs := make([]string, 0, len(returns)) - for i, ret := range returns[:len(returns)-1] { // Handle th final error separately - if strings.HasPrefix(ret, "*") { - outs = append(outs, rets[i]) - } else { - outs = append(outs, "*"+rets[i]) - } + for _, ret := range rets { // Handle th final error separately + outs = append(outs, "*"+ret) } outs = append(outs, "err") @@ -313,5 +416,5 @@ func bindTransactionBody(kind string, method string, params []string) string { input = "," + strings.Join(inputs, ",") } // Request executing the contract call and return the results with the errors - return fmt.Sprintf("return _%s.common.contract.Transact(auth, \"%s\" %s)", kind, method, input) + return fmt.Sprintf("return _%s.contract.Transact(opts, \"%s\" %s)", kind, method, input) } diff --git a/accounts/abi/bind/bind_test.go b/accounts/abi/bind/bind_test.go index f13f7829e4..a86d39db71 100644 --- a/accounts/abi/bind/bind_test.go +++ b/accounts/abi/bind/bind_test.go @@ -43,13 +43,13 @@ var bindTests = []struct { `contract NilContract {}`, `606060405260068060106000396000f3606060405200`, `[]`, - `if b, err := NewEmpty(common.Address{}, bind.NilBackend); b == nil || err != nil { + `if b, err := NewEmpty(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("combined binding (%v) nil or error (%v) not nil", b, nil) } - if b, err := NewEmptyCaller(common.Address{}, bind.NilBackend); b == nil || err != nil { + if b, err := NewEmptyCaller(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("caller binding (%v) nil or error (%v) not nil", b, nil) } - if b, err := NewEmptyTransactor(common.Address{}, bind.NilBackend); b == nil || err != nil { + if b, err := NewEmptyTransactor(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("transactor binding (%v) nil or error (%v) not nil", b, nil) }`, }, @@ -59,7 +59,7 @@ var bindTests = []struct { `https://ethereum.org/token`, `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`, `[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"name":"success","type":"bool"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"spentAllowance","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"inputs":[{"name":"initialSupply","type":"uint256"},{"name":"tokenName","type":"string"},{"name":"decimalUnits","type":"uint8"},{"name":"tokenSymbol","type":"string"}],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]`, - `if b, err := NewToken(common.Address{}, bind.NilBackend); b == nil || err != nil { + `if b, err := NewToken(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("binding (%v) nil or error (%v) not nil", b, nil) }`, }, @@ -68,7 +68,7 @@ var bindTests = []struct { `https://ethereum.org/crowdsale`, `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`, `[{"constant":false,"inputs":[],"name":"checkGoalReached","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"deadline","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"beneficiary","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":true,"inputs":[],"name":"tokenReward","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":true,"inputs":[],"name":"fundingGoal","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"amountRaised","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"price","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"funders","outputs":[{"name":"addr","type":"address"},{"name":"amount","type":"uint256"}],"type":"function"},{"inputs":[{"name":"ifSuccessfulSendTo","type":"address"},{"name":"fundingGoalInEthers","type":"uint256"},{"name":"durationInMinutes","type":"uint256"},{"name":"etherCostOfEachToken","type":"uint256"},{"name":"addressOfTokenUsedAsReward","type":"address"}],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"backer","type":"address"},{"indexed":false,"name":"amount","type":"uint256"},{"indexed":false,"name":"isContribution","type":"bool"}],"name":"FundTransfer","type":"event"}]`, - `if b, err := NewCrowdsale(common.Address{}, bind.NilBackend); b == nil || err != nil { + `if b, err := NewCrowdsale(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("binding (%v) nil or error (%v) not nil", b, nil) }`, }, @@ -77,7 +77,7 @@ var bindTests = []struct { `https://ethereum.org/dao`, 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`[{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"proposals","outputs":[{"name":"recipient","type":"address"},{"name":"amount","type":"uint256"},{"name":"description","type":"string"},{"name":"votingDeadline","type":"uint256"},{"name":"executed","type":"bool"},{"name":"proposalPassed","type":"bool"},{"name":"numberOfVotes","type":"uint256"},{"name":"currentResult","type":"int256"},{"name":"proposalHash","type":"bytes32"}],"type":"function"},{"constant":false,"inputs":[{"name":"proposalNumber","type":"uint256"},{"name":"transactionBytecode","type":"bytes"}],"name":"executeProposal","outputs":[{"name":"result","type":"int256"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"memberId","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"numProposals","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"members","outputs":[{"name":"member","type":"address"},{"name":"canVote","type":"bool"},{"name":"name","type":"string"},{"name":"memberSince","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"debatingPeriodInMinutes","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"minimumQuorum","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[{"name":"targetMember","type":"address"},{"name":"canVote","type":"bool"},{"name":"memberName","type":"string"}],"name":"changeMembership","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"majorityMargin","outputs":[{"name":"","type":"int256"}],"type":"function"},{"constant":false,"inputs":[{"name":"beneficiary","type":"address"},{"name":"etherAmount","type":"uint256"},{"name":"JobDescription","type":"string"},{"name":"transactionBytecode","type":"bytes"}],"name":"newProposal","outputs":[{"name":"proposalID","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[{"name":"minimumQuorumForProposals","type":"uint256"},{"name":"minutesForDebate","type":"uint256"},{"name":"marginOfVotesForMajority","type":"int256"}],"name":"changeVotingRules","outputs":[],"type":"function"},{"constant":false,"inputs":[{"name":"proposalNumber","type":"uint256"},{"name":"supportsProposal","type":"bool"},{"name":"justificationText","type":"string"}],"name":"vote","outputs":[{"name":"voteID","type":"uint256"}],"type":"function"},{"constant":true,"inputs":[{"name":"proposalNumber","type":"uint256"},{"name":"beneficiary","type":"address"},{"name":"etherAmount","type":"uint256"},{"name":"transactionBytecode","type":"bytes"}],"name":"checkProposalCode","outputs":[{"name":"codeChecksOut","type":"bool"}],"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"type":"function"},{"inputs":[{"name":"minimumQuorumForProposals","type":"uint256"},{"name":"minutesForDebate","type":"uint256"},{"name":"marginOfVotesForMajority","type":"int256"},{"name":"congressLeader","type":"address"}],"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"proposalID","type":"uint256"},{"indexed":false,"name":"recipient","type":"address"},{"indexed":false,"name":"amount","type":"uint256"},{"indexed":false,"name":"description","type":"string"}],"name":"ProposalAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"proposalID","type":"uint256"},{"indexed":false,"name":"position","type":"bool"},{"indexed":false,"name":"voter","type":"address"},{"indexed":false,"name":"justification","type":"string"}],"name":"Voted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"proposalID","type":"uint256"},{"indexed":false,"name":"result","type":"int256"},{"indexed":false,"name":"quorum","type":"uint256"},{"indexed":false,"name":"active","type":"bool"}],"name":"ProposalTallied","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"member","type":"address"},{"indexed":false,"name":"isMember","type":"bool"}],"name":"MembershipChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"minimumQuorum","type":"uint256"},{"indexed":false,"name":"debatingPeriodInMinutes","type":"uint256"},{"indexed":false,"name":"majorityMargin","type":"int256"}],"name":"ChangeOfRules","type":"event"}]`, - `if b, err := NewDAO(common.Address{}, bind.NilBackend); b == nil || err != nil { + `if b, err := NewDAO(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("binding (%v) nil or error (%v) not nil", b, nil) }`, }, @@ -92,7 +92,7 @@ func TestBindings(t *testing.T) { t.Skip("go sdk not found for testing") } // Skip the test if the go-ethereum sources are symlinked (https://github.com/golang/go/issues/14845) - linkTestCode := fmt.Sprintf("package linktest\nfunc CheckSymlinks(){\nfmt.Println(bind.NilBackend)\n}") + linkTestCode := fmt.Sprintf("package linktest\nfunc CheckSymlinks(){\nfmt.Println(backends.NewNilBackend())\n}") linkTestDeps, err := imports.Process("", []byte(linkTestCode), nil) if err != nil { t.Fatalf("failed check for goimports symlink bug: %v", err) @@ -110,7 +110,7 @@ func TestBindings(t *testing.T) { defer os.RemoveAll(ws) // Generate the binding and create a Go package in the workspace - bind, err := Bind(tt.abi, "bindtest", tt.name) + bind, err := Bind(tt.abi, tt.bytecode, "bindtest", tt.name) if err != nil { t.Fatalf("test %d: failed to generate binding: %v", i, err) } diff --git a/cmd/abigen/main.go b/cmd/abigen/main.go index d36784de80..227c390a6c 100644 --- a/cmd/abigen/main.go +++ b/cmd/abigen/main.go @@ -27,9 +27,10 @@ import ( var ( abiFlag = flag.String("abi", "", "Path to the Ethereum contract ABI json to bind") + binFlag = flag.String("bin", "", "Path to the Ethereum contract bytecode (generate deploy method)") pkgFlag = flag.String("pkg", "", "Go package name to generate the binding into") typFlag = flag.String("type", "", "Go struct name for the binding (default = package name)") - outFlag = flag.String("out", "", "Output path for the generated binding") + outFlag = flag.String("out", "", "Output path for the generated binding (default = stdout)") ) func main() { @@ -44,17 +45,25 @@ func main() { fmt.Printf("No destination Go package specified (--pkg)\n") os.Exit(-1) } - // Generate the contract binding - in, err := ioutil.ReadFile(*abiFlag) + // Read the ABI json from disk and optionally the contract bytecode too + abi, err := ioutil.ReadFile(*abiFlag) if err != nil { fmt.Printf("Failed to read input ABI: %v\n", err) os.Exit(-1) } + bin := []byte{} + if *binFlag != "" { + if bin, err = ioutil.ReadFile(*binFlag); err != nil { + fmt.Printf("Failed to read input bytecode: %v\n", err) + os.Exit(-1) + } + } + // Generate the contract binding kind := *typFlag if kind == "" { kind = *pkgFlag } - code, err := bind.Bind(string(in), *pkgFlag, kind) + code, err := bind.Bind(string(abi), string(bin), *pkgFlag, kind) if err != nil { fmt.Printf("Failed to generate ABI binding: %v\n", err) os.Exit(-1)