From 73308dbe0e08db015a7c461b5be1755dc3fcc737 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= Date: Mon, 21 Mar 2016 14:34:49 +0200 Subject: [PATCH] accounts/abi/bind, cmd/abigen: port to templates, bind to solidity --- accounts/abi/bind/auth.go | 14 +- accounts/abi/bind/backend.go | 16 +- accounts/abi/bind/backends/nil.go | 11 +- accounts/abi/bind/backends/remote.go | 66 ++-- accounts/abi/bind/backends/simulated.go | 33 +- accounts/abi/bind/base.go | 26 +- accounts/abi/bind/bind.go | 427 +++++------------------- accounts/abi/bind/bind_test.go | 155 +++++++-- accounts/abi/bind/template.go | 212 ++++++++++++ cmd/abigen/main.go | 84 +++-- 10 files changed, 595 insertions(+), 449 deletions(-) create mode 100644 accounts/abi/bind/template.go diff --git a/accounts/abi/bind/auth.go b/accounts/abi/bind/auth.go index e0491497c..624f995b0 100644 --- a/accounts/abi/bind/auth.go +++ b/accounts/abi/bind/auth.go @@ -18,6 +18,8 @@ package bind import ( "errors" + "io" + "io/ioutil" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core/types" @@ -25,9 +27,13 @@ import ( ) // 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) +// an encrypted json key stream and the associated passphrase. +func NewTransactor(keyin io.Reader, passphrase string) (*TransactOpts, error) { + json, err := ioutil.ReadAll(keyin) + if err != nil { + return nil, err + } + key, err := crypto.DecryptKey(json, passphrase) if err != nil { return nil, err } @@ -38,7 +44,7 @@ func NewTransactor(keyjson string, passphrase string) (*TransactOpts, error) { // from a plain go-ethereum crypto key. func NewKeyedTransactor(key *crypto.Key) *TransactOpts { return &TransactOpts{ - Account: key.Address, + From: 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") diff --git a/accounts/abi/bind/backend.go b/accounts/abi/bind/backend.go index 596e97f1d..328f9f3b7 100644 --- a/accounts/abi/bind/backend.go +++ b/accounts/abi/bind/backend.go @@ -38,14 +38,18 @@ type ContractCaller interface { // to the transactor to decide. type ContractTransactor interface { // Nonce retrieves the current pending nonce associated with an account. - AccountNonce(account common.Address) (uint64, error) + PendingAccountNonce(account common.Address) (uint64, error) - // GasPrice retrieves the currently suggested gas price to allow a timely execution - // of a transaction. - GasPrice() (*big.Int, error) + // SuggestGasPrice retrieves the currently suggested gas price to allow a timely + // execution of a transaction. + SuggestGasPrice() (*big.Int, error) - // GasLimit tries to estimate the gas needed to execute a specific transaction. - GasLimit(sender common.Address, contract *common.Address, value *big.Int, data []byte) (*big.Int, error) + // EstimateGasLimit tries to estimate the gas needed to execute a specific + // transaction based on the current pending state of the backend blockchain. + // There is no guarantee that this is the true gas limit requirement as other + // transactions may be added or removed by miners, but it should provide a basis + // for setting a reasonable default. + EstimateGasLimit(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 diff --git a/accounts/abi/bind/backends/nil.go b/accounts/abi/bind/backends/nil.go index 8b1f9d63e..3b1e6dce7 100644 --- a/accounts/abi/bind/backends/nil.go +++ b/accounts/abi/bind/backends/nil.go @@ -24,6 +24,9 @@ import ( "github.com/ethereum/go-ethereum/core/types" ) +// This nil assignment ensures compile time that nilBackend implements bind.ContractBackend. +var _ bind.ContractBackend = (*nilBackend)(nil) + // 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. @@ -32,12 +35,12 @@ 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) { +func (*nilBackend) EstimateGasLimit(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") } +func (*nilBackend) SuggestGasPrice() (*big.Int, error) { panic("not implemented") } +func (*nilBackend) PendingAccountNonce(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. diff --git a/accounts/abi/bind/backends/remote.go b/accounts/abi/bind/backends/remote.go index 7177809bb..8e990f076 100644 --- a/accounts/abi/bind/backends/remote.go +++ b/accounts/abi/bind/backends/remote.go @@ -30,6 +30,9 @@ import ( "github.com/ethereum/go-ethereum/rpc" ) +// This nil assignment ensures compile time that rpcBackend implements bind.ContractBackend. +var _ bind.ContractBackend = (*rpcBackend)(nil) + // 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. @@ -53,16 +56,16 @@ func NewRPCBackend(client rpc.Client) bind.ContractBackend { // 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 + 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 + 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 } @@ -71,9 +74,9 @@ type response struct { // // 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() +func (b *rpcBackend) request(method string, params []interface{}) (json.RawMessage, error) { + b.lock.Lock() + defer b.lock.Unlock() // Ugly hack to serialize an empty list properly if params == nil { @@ -81,16 +84,16 @@ func (backend *rpcBackend) request(method string, params []interface{}) (json.Ra } // Assemble the request object req := &request{ - JsonRpc: "2.0", - Id: int(atomic.AddUint32(&backend.autoid, 1)), + JSONRPC: "2.0", + ID: int(atomic.AddUint32(&b.autoid, 1)), Method: method, Params: params, } - if err := backend.client.Send(req); err != nil { + if err := b.client.Send(req); err != nil { return nil, err } res := new(response) - if err := backend.client.Recv(res); err != nil { + if err := b.client.Recv(res); err != nil { return nil, err } if len(res.Error) > 0 { @@ -127,9 +130,9 @@ func (b *rpcBackend) ContractCall(contract common.Address, data []byte, pending 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) { +// PendingAccountNonce implements ContractTransactor.PendingAccountNonce, delegating +// the current account nonce retrieval to the remote node. +func (b *rpcBackend) PendingAccountNonce(account common.Address) (uint64, error) { res, err := b.request("eth_getTransactionCount", []interface{}{account.Hex(), "pending"}) if err != nil { return 0, err @@ -138,12 +141,16 @@ func (b *rpcBackend) AccountNonce(account common.Address) (uint64, error) { if err := json.Unmarshal(res, &hex); err != nil { return 0, err } - return new(big.Int).SetBytes(common.FromHex(hex)).Uint64(), nil + nonce, ok := new(big.Int).SetString(hex, 0) + if !ok { + return 0, fmt.Errorf("invalid nonce hex: %s", hex) + } + return nonce.Uint64(), nil } -// GasPrice implements ContractTransactor.GasPrice, delegating the gas price -// oracle request to the remote node. -func (b *rpcBackend) GasPrice() (*big.Int, error) { +// SuggestGasPrice implements ContractTransactor.SuggestGasPrice, delegating the +// gas price oracle request to the remote node. +func (b *rpcBackend) SuggestGasPrice() (*big.Int, error) { res, err := b.request("eth_gasPrice", nil) if err != nil { return nil, err @@ -152,12 +159,16 @@ func (b *rpcBackend) GasPrice() (*big.Int, error) { if err := json.Unmarshal(res, &hex); err != nil { return nil, err } - return new(big.Int).SetBytes(common.FromHex(hex)), nil + price, ok := new(big.Int).SetString(hex, 0) + if !ok { + return nil, fmt.Errorf("invalid price hex: %s", hex) + } + return price, 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) { +// EstimateGasLimit implements ContractTransactor.EstimateGasLimit, delegating +// the gas estimation to the remote node. +func (b *rpcBackend) EstimateGasLimit(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"` @@ -179,12 +190,15 @@ func (b *rpcBackend) GasLimit(sender common.Address, contract *common.Address, v 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 + estimate, ok := new(big.Int).SetString(hex, 0) + if !ok { + return nil, fmt.Errorf("invalid estimate hex: %s", hex) + } + return estimate, nil } -// Transact implements ContractTransactor.SendTransaction, delegating the raw -// transaction injection to the remote node. +// SendTransaction 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 { diff --git a/accounts/abi/bind/backends/simulated.go b/accounts/abi/bind/backends/simulated.go index 17a0ed7fe..18e8481c5 100644 --- a/accounts/abi/bind/backends/simulated.go +++ b/accounts/abi/bind/backends/simulated.go @@ -19,6 +19,7 @@ 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" "github.com/ethereum/go-ethereum/core/state" @@ -27,6 +28,9 @@ import ( "github.com/ethereum/go-ethereum/event" ) +// This nil assignment ensures compile time that SimulatedBackend implements bind.ContractBackend. +var _ bind.ContractBackend = (*SimulatedBackend)(nil) + // SimulatedBackend implements bind.ContractBackend, simulating a blockchain in // the background. Its main purpose is to allow easily testing contract bindings. type SimulatedBackend struct { @@ -79,13 +83,11 @@ func (b *SimulatedBackend) ContractCall(contract common.Address, data []byte, pe statedb *state.StateDB ) if pending { - block, statedb = b.pendingBlock, b.pendingState + block, statedb = b.pendingBlock, b.pendingState.Copy() } 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) @@ -100,28 +102,29 @@ func (b *SimulatedBackend) ContractCall(contract common.Address, data []byte, pe data: data, } // Execute the call and return - vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header()) + vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header(), nil) 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) { +// PendingAccountNonce implements ContractTransactor.PendingAccountNonce, retrieving +// the nonce currently pending for the account. +func (b *SimulatedBackend) PendingAccountNonce(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) { +// SuggestGasPrice implements ContractTransactor.SuggestGasPrice. Since the simulated +// chain doens't have miners, we just return a gas price of 1 for any call. +func (b *SimulatedBackend) SuggestGasPrice() (*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) { +// EstimateGasLimit implements ContractTransactor.EstimateGasLimit, executing the +// requested code against the currently pending block/state and returning the used +// gas. +func (b *SimulatedBackend) EstimateGasLimit(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 @@ -142,14 +145,14 @@ func (b *SimulatedBackend) GasLimit(sender common.Address, contract *common.Addr data: data, } // Execute the call and return - vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header()) + vmenv := core.NewEnv(statedb, b.blockchain, msg, block.Header(), nil) gaspool := new(core.GasPool).AddGas(common.MaxBig) _, gas, err := core.ApplyMessage(vmenv, msg, gaspool) return gas, err } -// Transact implements ContractTransactor.SendTransaction, delegating the raw +// SendTransaction 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) { diff --git a/accounts/abi/bind/base.go b/accounts/abi/bind/base.go index e9e35fbcb..053b4ccc0 100644 --- a/accounts/abi/bind/base.go +++ b/accounts/abi/bind/base.go @@ -39,9 +39,9 @@ type CallOpts struct { // 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) + From 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) Value *big.Int // Funds to transfer along along the transaction (nil = 0 = no funds) GasPrice *big.Int // Gas price to use for the transaction execution (nil = gas price oracle) @@ -72,12 +72,8 @@ 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)) + c := NewBoundContract(common.Address{}, abi, backend, backend) input, err := c.abi.Pack("", params...) if err != nil { @@ -87,7 +83,7 @@ func DeployContract(opts *TransactOpts, abi abi.ABI, bytecode []byte, backend Co if err != nil { return common.Address{}, nil, nil, err } - c.address = crypto.CreateAddress(opts.Account, tx.Nonce()) + c.address = crypto.CreateAddress(opts.From, tx.Nonce()) return c.address, tx, c, nil } @@ -115,10 +111,6 @@ func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string, // 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 *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 { @@ -139,7 +131,7 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i } nonce := uint64(0) if opts.Nonce == nil { - nonce, err = c.transactor.AccountNonce(opts.Account) + nonce, err = c.transactor.PendingAccountNonce(opts.From) if err != nil { return nil, fmt.Errorf("failed to retrieve account nonce: %v", err) } @@ -149,14 +141,14 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i // Figure out the gas allowance and gas price values gasPrice := opts.GasPrice if gasPrice == nil { - gasPrice, err = c.transactor.GasPrice() + gasPrice, err = c.transactor.SuggestGasPrice() if err != nil { return nil, fmt.Errorf("failed to suggest gas price: %v", err) } } gasLimit := opts.GasLimit if gasLimit == nil { - gasLimit, err = c.transactor.GasLimit(opts.Account, contract, value, input) + gasLimit, err = c.transactor.EstimateGasLimit(opts.From, contract, value, input) if err != nil { return nil, fmt.Errorf("failed to exstimate gas needed: %v", err) } @@ -171,7 +163,7 @@ func (c *BoundContract) transact(opts *TransactOpts, contract *common.Address, i if opts.Signer == nil { return nil, errors.New("no signer to authorize the transaction with") } - signedTx, err := opts.Signer(opts.Account, rawTx) + signedTx, err := opts.Signer(opts.From, rawTx) if err != nil { return nil, err } diff --git a/accounts/abi/bind/bind.go b/accounts/abi/bind/bind.go index 5bd230d0d..8b587f1aa 100644 --- a/accounts/abi/bind/bind.go +++ b/accounts/abi/bind/bind.go @@ -15,13 +15,17 @@ // along with the go-ethereum library. If not, see . // Package bind generates Ethereum contract Go bindings. +// +// Detailed usage document and tutorial available on the go-ethereum Wiki page: +// https://github.com/ethereum/go-ethereum/wiki/Native-DApps:-Go-bindings-to-Ethereum-contracts package bind import ( "bytes" "fmt" - "sort" "strings" + "text/template" + "unicode" "github.com/ethereum/go-ethereum/accounts/abi" "golang.org/x/tools/imports" @@ -31,254 +35,84 @@ 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(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(abijson)) - if err != nil { - return "", err - } - // Generate the contract type, fields and methods - code := new(bytes.Buffer) - kind = strings.ToUpper(kind[:1]) + kind[1:] +func Bind(types []string, abis []string, bytecodes []string, pkg string) (string, error) { + // Process each individual contract requested binding + contracts := make(map[string]*tmplContract) - fmt.Fprintf(code, "%s\n", bindContract(kind, strings.TrimSpace(abijson))) - fmt.Fprintf(code, "%s\n", bindConstructor(kind, strings.TrimSpace(bytecode), abi.Constructor)) + for i := 0; i < len(types); i++ { + // Parse the actual ABI to generate the binding for + evmABI, err := abi.JSON(strings.NewReader(abis[i])) + if err != nil { + return "", err + } + // Strip any whitespace from the JSON ABI + strippedABI := strings.Map(func(r rune) rune { + if unicode.IsSpace(r) { + return -1 + } + return r + }, abis[i]) - methods := make([]string, 0, len(abi.Methods)) - for name, _ := range abi.Methods { - methods = append(methods, name) - } - sort.Strings(methods) + // Extract the call and transact methods, and sort them alphabetically + var ( + calls = make(map[string]*tmplMethod) + transacts = make(map[string]*tmplMethod) + ) + for _, original := range evmABI.Methods { + // Normalize the method for capital cases and non-anonymous inputs/outputs + normalized := original + normalized.Name = capitalise(original.Name) - for _, method := range methods { - fmt.Fprintf(code, "%s\n", bindMethod(kind, abi.Methods[method])) + normalized.Inputs = make([]abi.Argument, len(original.Inputs)) + copy(normalized.Inputs, original.Inputs) + for j, input := range normalized.Inputs { + if input.Name == "" { + normalized.Inputs[j].Name = fmt.Sprintf("arg%d", j) + } + } + normalized.Outputs = make([]abi.Argument, len(original.Outputs)) + copy(normalized.Outputs, original.Outputs) + for j, output := range normalized.Outputs { + if output.Name != "" { + normalized.Outputs[j].Name = capitalise(output.Name) + } + } + // Append the methos to the call or transact lists + if original.Const { + calls[original.Name] = &tmplMethod{Original: original, Normalized: normalized, Structured: structured(original)} + } else { + transacts[original.Name] = &tmplMethod{Original: original, Normalized: normalized, Structured: structured(original)} + } + } + contracts[types[i]] = &tmplContract{ + Type: capitalise(types[i]), + InputABI: strippedABI, + InputBin: strings.TrimSpace(bytecodes[i]), + Constructor: evmABI.Constructor, + Calls: calls, + Transacts: transacts, + } + } + // Generate the contract template data content and render it + data := &tmplData{ + Package: pkg, + Contracts: contracts, } - // 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) + funcs := map[string]interface{}{ + "bindtype": bindType, + } + tmpl := template.Must(template.New("").Funcs(funcs).Parse(tmplSource)) + if err := tmpl.Execute(buffer, data); err != nil { + return "", err + } + // Pass the code through goimports to clean it up and double check + code, err := imports.Process("", buffer.Bytes(), nil) if err != nil { - return "", fmt.Errorf("%v\n%s", err, code) + return "", fmt.Errorf("%v\n%s", err, buffer) } - return string(blob), nil -} - -// 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, 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, abijson) - - // 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) - code += fmt.Sprintf(" %sTransactor // Write-only binding to the contract\n", kind) - code += fmt.Sprintf("}\n\n") - - 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(" 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(" contract *bind.BoundContract // Generic contract wrapper for the low level calls\n") - code += fmt.Sprintf("}\n\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(" 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{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(" 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{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(" 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{contract: contract}, nil\n", kind) - code += fmt.Sprintf("}\n\n") - - 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 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 ( - name = strings.ToUpper(method.Name[:1]) + method.Name[1:] - prologue = new(bytes.Buffer) - ) - // Generate the argument and return list for the function - args := make([]string, 0, len(method.Inputs)) - for i, arg := range method.Inputs { - param := arg.Name - if param == "" { - param = fmt.Sprintf("arg%d", i) - } - args = append(args, fmt.Sprintf("%s %s", param, bindType(arg.Type))) - } - returns, _ := bindReturn(prologue, name, method.Outputs) - - // Generate the docs to help with coding against the binding - callTypeDoc := "free data retrieval call" - if !method.Const { - callTypeDoc = "paid mutator transaction" - } - docs := fmt.Sprintf("// %s is a %s binding the contract method 0x%x.\n", name, callTypeDoc, method.Id()) - 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 { - // 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 { - // 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 + return string(code), nil } // bindType converts a Solidity type to a Go one. Since there is no clear mapping @@ -319,102 +153,21 @@ func bindType(kind abi.Type) string { } } -// bindReturn creates the list of return parameters for a method invocation. If -// all the fields of the return type are named, and there is more than one value -// being returned, the returns are wrapped in a result struct. -func bindReturn(prologue *bytes.Buffer, method string, outputs []abi.Argument) ([]string, string) { - // Generate the anonymous return list for when a struct is not needed/possible - var ( - returns = make([]string, 0, len(outputs)+1) - anonymous = false - ) - for _, ret := range outputs { - returns = append(returns, bindType(ret.Type)) - if ret.Name == "" { - anonymous = true +// capitalise makes the first character of a string upper case. +func capitalise(input string) string { + return strings.ToUpper(input[:1]) + input[1:] +} + +// structured checks whether a method has enough information to return a proper +// Go struct ot if flat returns are needed. +func structured(method abi.Method) bool { + if len(method.Outputs) < 2 { + return false + } + for _, out := range method.Outputs { + if out.Name == "" { + return false } } - if anonymous || len(returns) < 2 { - returns = append(returns, "error") - return returns, "" - } - // If the returns are named and numerous, wrap in a result struct - wrapper, impl := bindReturnStruct(method, outputs) - prologue.WriteString(impl + "\n") - return []string{"*" + wrapper, "error"}, wrapper -} - -// bindReturnStruct creates a Go structure with the specified fields to be used -// as the return type from a method call. -func bindReturnStruct(method string, returns []abi.Argument) (string, string) { - fields := make([]string, 0, len(returns)) - for _, ret := range returns { - fields = append(fields, fmt.Sprintf("%s %s", strings.ToUpper(ret.Name[:1])+ret.Name[1:], bindType(ret.Type))) - } - kind := fmt.Sprintf("%sResult", method) - docs := fmt.Sprintf("// %s is the result of the %s invocation.", kind, method) - - return kind, fmt.Sprintf("%s\ntype %s struct {\n%s\n}", docs, kind, strings.Join(fields, "\n")) -} - -// bindCallBody creates the Go code to declare a batch of return values, invoke -// an Ethereum method call with the requested parameters, parse the binary output -// into the return values and return them. -func bindCallBody(kind string, method string, params []string, returns []string) string { - body := "" - - // Allocate memory for each of the return values - rets := make([]string, 0, len(returns)-1) - if len(returns) > 1 { - body += "var (" - for i, kind := range returns[:len(returns)-1] { // Omit the final error - name := fmt.Sprintf("ret%d", i) - - rets = append(rets, name) - body += fmt.Sprintf("%s = new(%s)\n", name, kind) - } - body += ")\n" - } - // Assemble a single collector variable for the result ABI initialization - result := strings.Join(rets, ",") - if len(returns) > 2 { - result = "[]interface{}{" + result + "}" - } - // Extract the parameter list into a flat variable name list - inputs := make([]string, len(params)-1) // Omit the call options - for i, param := range params[1:] { - inputs[i] = strings.Split(param, " ")[0] - } - input := "" - if len(inputs) > 0 { - input = "," + strings.Join(inputs, ",") - } - // Request executing the contract call and return the results with the errors - body += fmt.Sprintf("err := _%s.contract.Call(opts, %s, \"%s\" %s)\n", kind, result, method, input) - - outs := make([]string, 0, len(returns)) - for _, ret := range rets { // Handle th final error separately - outs = append(outs, "*"+ret) - } - outs = append(outs, "err") - - body += fmt.Sprintf("return %s", strings.Join(outs, ",")) - - return body -} - -// bindTransactionBody creates the Go code to invoke an Ethereum transaction call -// with the requested parameters, and return the assembled transaction object. -func bindTransactionBody(kind string, method string, params []string) string { - // Extract the parameter list into a flat variable name list - inputs := make([]string, len(params)-1) // Omit the auth options - for i, param := range params[1:] { - inputs[i] = strings.Split(param, " ")[0] - } - input := "" - if len(inputs) > 0 { - input = "," + strings.Join(inputs, ",") - } - // Request executing the contract call and return the results with the errors - return fmt.Sprintf("return _%s.contract.Transact(opts, \"%s\" %s)", kind, method, input) + return true } diff --git a/accounts/abi/bind/bind_test.go b/accounts/abi/bind/bind_test.go index a86d39db7..c6ed7a630 100644 --- a/accounts/abi/bind/bind_test.go +++ b/accounts/abi/bind/bind_test.go @@ -43,15 +43,17 @@ var bindTests = []struct { `contract NilContract {}`, `606060405260068060106000396000f3606060405200`, `[]`, - `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{}, 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{}, backends.NewNilBackend()); b == nil || err != nil { - t.Fatalf("transactor binding (%v) nil or error (%v) not nil", b, 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{}, 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{}, backends.NewNilBackend()); b == nil || err != nil { + t.Fatalf("transactor binding (%v) nil or error (%v) not nil", b, nil) + } + `, }, // Test that all the official sample contracts bind correctly { @@ -59,28 +61,141 @@ 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{}, backends.NewNilBackend()); b == nil || err != nil { - t.Fatalf("binding (%v) nil or error (%v) not nil", b, 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) + } + `, }, { `Crowdsale`, `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{}, backends.NewNilBackend()); b == nil || err != nil { - t.Fatalf("binding (%v) nil or error (%v) not nil", b, 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) + } + `, }, { `DAO`, `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{}, backends.NewNilBackend()); 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) + } + `, + }, + // Test that named and anonymous inputs are handled correctly + { + `InputChecker`, ``, ``, + ` + [ + {"type":"function","name":"noInput","constant":true,"inputs":[],"outputs":[]}, + {"type":"function","name":"namedInput","constant":true,"inputs":[{"name":"str","type":"string"}],"outputs":[]}, + {"type":"function","name":"anonInput","constant":true,"inputs":[{"name":"","type":"string"}],"outputs":[]}, + {"type":"function","name":"namedInputs","constant":true,"inputs":[{"name":"str1","type":"string"},{"name":"str2","type":"string"}],"outputs":[]}, + {"type":"function","name":"anonInputs","constant":true,"inputs":[{"name":"","type":"string"},{"name":"","type":"string"}],"outputs":[]}, + {"type":"function","name":"mixedInputs","constant":true,"inputs":[{"name":"","type":"string"},{"name":"str","type":"string"}],"outputs":[]} + ] + `, + `if b, err := NewInputChecker(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { t.Fatalf("binding (%v) nil or error (%v) not nil", b, nil) + } else if false { // Don't run, just compile and test types + var err error + + err = b.NoInput(nil) + err = b.NamedInput(nil, "") + err = b.AnonInput(nil, "") + err = b.NamedInputs(nil, "", "") + err = b.AnonInputs(nil, "", "") + err = b.MixedInputs(nil, "", "") + + fmt.Println(err) }`, }, + // Test that named and anonymous outputs are handled correctly + { + `OutputChecker`, ``, ``, + ` + [ + {"type":"function","name":"noOutput","constant":true,"inputs":[],"outputs":[]}, + {"type":"function","name":"namedOutput","constant":true,"inputs":[],"outputs":[{"name":"str","type":"string"}]}, + {"type":"function","name":"anonOutput","constant":true,"inputs":[],"outputs":[{"name":"","type":"string"}]}, + {"type":"function","name":"namedOutputs","constant":true,"inputs":[],"outputs":[{"name":"str1","type":"string"},{"name":"str2","type":"string"}]}, + {"type":"function","name":"anonOutputs","constant":true,"inputs":[],"outputs":[{"name":"","type":"string"},{"name":"","type":"string"}]}, + {"type":"function","name":"mixedOutputs","constant":true,"inputs":[],"outputs":[{"name":"","type":"string"},{"name":"str","type":"string"}]} + ] + `, + `if b, err := NewOutputChecker(common.Address{}, backends.NewNilBackend()); b == nil || err != nil { + t.Fatalf("binding (%v) nil or error (%v) not nil", b, nil) + } else if false { // Don't run, just compile and test types + var str1, str2 string + var err error + + err = b.NoOutput(nil) + str1, err = b.NamedOutput(nil) + str1, err = b.AnonOutput(nil) + res, _ := b.NamedOutputs(nil) + str1, str2, err = b.AnonOutputs(nil) + str1, str2, err = b.MixedOutputs(nil) + + fmt.Println(str1, str2, res.Str1, res.Str2, err) + }`, + }, + // Test that contract interactions (deploy, transact and call) generate working code + { + `Interactor`, + ` + contract Interactor { + string public deployString; + string public transactString; + + function Interactor(string str) { + deployString = str; + } + + function transact(string str) { + transactString = str; + } + } + `, + `6060604052604051610328380380610328833981016040528051018060006000509080519060200190828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f10608d57805160ff19168380011785555b50607c9291505b8082111560ba57838155600101606b565b50505061026a806100be6000396000f35b828001600101855582156064579182015b828111156064578251826000505591602001919060010190609e565b509056606060405260e060020a60003504630d86a0e181146100315780636874e8091461008d578063d736c513146100ea575b005b610190600180546020600282841615610100026000190190921691909104601f810182900490910260809081016040526060828152929190828280156102295780601f106101fe57610100808354040283529160200191610229565b61019060008054602060026001831615610100026000190190921691909104601f810182900490910260809081016040526060828152929190828280156102295780601f106101fe57610100808354040283529160200191610229565b60206004803580820135601f81018490049093026080908101604052606084815261002f946024939192918401918190838280828437509496505050505050508060016000509080519060200190828054600181600116156101000203166002900490600052602060002090601f016020900481019282601f1061023157805160ff19168380011785555b506102619291505b808211156102665760008155830161017d565b60405180806020018281038252838181518152602001915080519060200190808383829060006004602084601f0104600f02600301f150905090810190601f1680156101f05780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b820191906000526020600020905b81548152906001019060200180831161020c57829003601f168201915b505050505081565b82800160010185558215610175579182015b82811115610175578251826000505591602001919060010190610243565b505050565b509056`, + `[{"constant":true,"inputs":[],"name":"transactString","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":true,"inputs":[],"name":"deployString","outputs":[{"name":"","type":"string"}],"type":"function"},{"constant":false,"inputs":[{"name":"str","type":"string"}],"name":"transact","outputs":[],"type":"function"},{"inputs":[{"name":"str","type":"string"}],"type":"constructor"}]`, + ` + // Generate a new random account and a funded simulator + key := crypto.NewKey(rand.Reader) + sim := backends.NewSimulatedBackend(core.GenesisAccount{Address: key.Address, Balance: big.NewInt(10000000000)}) + + // Convert the tester key to an authorized transactor for ease of use + auth := bind.NewKeyedTransactor(key) + + // Deploy an interaction tester contract and call a transaction on it + _, _, interactor, err := DeployInteractor(auth, sim, "Deploy string") + if err != nil { + t.Fatalf("Failed to deploy interactor contract: %v", err) + } + if _, err := interactor.Transact(auth, "Transact string"); err != nil { + t.Fatalf("Failed to transact with interactor contract: %v", err) + } + // Commit all pending transactions in the simulator and check the contract state + sim.Commit() + + if str, err := interactor.DeployString(nil); err != nil { + t.Fatalf("Failed to retrieve deploy string: %v", err) + } else if str != "Deploy string" { + t.Fatalf("Deploy string mismatch: have '%s', want 'Deploy string'", str) + } + if str, err := interactor.TransactString(nil); err != nil { + t.Fatalf("Failed to retrieve transact string: %v", err) + } else if str != "Transact string" { + t.Fatalf("Transact string mismatch: have '%s', want 'Transact string'", str) + } + `, + }, } // Tests that packages generated by the binder can be successfully compiled and @@ -110,15 +225,15 @@ 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, tt.bytecode, "bindtest", tt.name) + bind, err := Bind([]string{tt.name}, []string{tt.abi}, []string{tt.bytecode}, "bindtest") if err != nil { t.Fatalf("test %d: failed to generate binding: %v", i, err) } pkg := filepath.Join(ws, "bindtest") - if err := os.MkdirAll(pkg, 0700); err != nil { + if err = os.MkdirAll(pkg, 0700); err != nil { t.Fatalf("test %d: failed to create package: %v", i, err) } - if err := ioutil.WriteFile(filepath.Join(pkg, "main.go"), []byte(bind), 0600); err != nil { + if err = ioutil.WriteFile(filepath.Join(pkg, "main.go"), []byte(bind), 0600); err != nil { t.Fatalf("test %d: failed to write binding: %v", i, err) } // Generate the test file with the injected test code @@ -134,7 +249,7 @@ func TestBindings(t *testing.T) { cmd := exec.Command(gocmd, "test", "-v") cmd.Dir = pkg if out, err := cmd.CombinedOutput(); err != nil { - t.Fatalf("test %d: failed to run binding test: %v\n%s", i, err, out) + t.Fatalf("test %d: failed to run binding test: %v\n%s\n%s", i, err, out, bind) } } } diff --git a/accounts/abi/bind/template.go b/accounts/abi/bind/template.go new file mode 100644 index 000000000..5e160d203 --- /dev/null +++ b/accounts/abi/bind/template.go @@ -0,0 +1,212 @@ +// 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 "github.com/ethereum/go-ethereum/accounts/abi" + +// tmplData is the data structure required to fill the binding template. +type tmplData struct { + Package string // Name of the package to place the generated file in + Contracts map[string]*tmplContract // List of contracts to generate into this file +} + +// tmplContract contains the data needed to generate an individual contract binding. +type tmplContract struct { + Type string // Type name of the main contract binding + InputABI string // JSON ABI used as the input to generate the binding from + InputBin string // Optional EVM bytecode used to denetare deploy code from + Constructor abi.Method // Contract constructor for deploy parametrization + Calls map[string]*tmplMethod // Contract calls that only read state data + Transacts map[string]*tmplMethod // Contract calls that write state data +} + +// tmplMethod is a wrapper around an abi.Method that contains a few preprocessed +// and cached data fields. +type tmplMethod struct { + Original abi.Method // Original method as parsed by the abi package + Normalized abi.Method // Normalized version of the parsed method (capitalized names, non-anonymous args/returns) + Structured bool // Whether the returns should be accumulated into a contract +} + +// tmplSource is the Go source template use to generate the contract binding +// based on. +const tmplSource = ` +// This file is an automatically generated Go binding. Do not modify as any +// change will likely be lost upon the next re-generation! + +package {{.Package}} + +{{range $contract := .Contracts}} + // {{.Type}}ABI is the input ABI used to generate the binding from. + const {{.Type}}ABI = ` + "`" + `{{.InputABI}}` + "`" + ` + + {{if .InputBin}} + // {{.Type}}Bin is the compiled bytecode used for deploying new contracts. + const {{.Type}}Bin = ` + "`" + `{{.InputBin}}` + "`" + ` + + // Deploy{{.Type}} deploys a new Ethereum contract, binding an instance of {{.Type}} to it. + func Deploy{{.Type}}(auth *bind.TransactOpts, backend bind.ContractBackend {{range .Constructor.Inputs}}, {{.Name}} {{bindtype .Type}}{{end}}) (common.Address, *types.Transaction, *{{.Type}}, error) { + parsed, err := abi.JSON(strings.NewReader({{.Type}}ABI)) + if err != nil { + return common.Address{}, nil, nil, err + } + address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex({{.Type}}Bin), backend {{range .Constructor.Inputs}}, {{.Name}}{{end}}) + if err != nil { + return common.Address{}, nil, nil, err + } + return address, tx, &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract} }, nil + } + {{end}} + + // {{.Type}} is an auto generated Go binding around an Ethereum contract. + type {{.Type}} struct { + {{.Type}}Caller // Read-only binding to the contract + {{.Type}}Transactor // Write-only binding to the contract + } + + // {{.Type}}Caller is an auto generated read-only Go binding around an Ethereum contract. + type {{.Type}}Caller struct { + contract *bind.BoundContract // Generic contract wrapper for the low level calls + } + + // {{.Type}}Transactor is an auto generated write-only Go binding around an Ethereum contract. + type {{.Type}}Transactor struct { + contract *bind.BoundContract // Generic contract wrapper for the low level calls + } + + // {{.Type}}Session is an auto generated Go binding around an Ethereum contract, + // with pre-set call and transact options. + type {{.Type}}Session struct { + Contract *{{.Type}} // Generic contract binding to set the session for + CallOpts bind.CallOpts // Call options to use throughout this session + TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session + } + + // {{.Type}}CallerSession is an auto generated read-only Go binding around an Ethereum contract, + // with pre-set call options. + type {{.Type}}CallerSession struct { + Contract *{{.Type}}Caller // Generic contract caller binding to set the session for + CallOpts bind.CallOpts // Call options to use throughout this session + } + + // {{.Type}}TransactorSession is an auto generated write-only Go binding around an Ethereum contract, + // with pre-set transact options. + type {{.Type}}TransactorSession struct { + Contract *{{.Type}}Transactor // Generic contract transactor binding to set the session for + TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session + } + + // New{{.Type}} creates a new instance of {{.Type}}, bound to a specific deployed contract. + func New{{.Type}}(address common.Address, backend bind.ContractBackend) (*{{.Type}}, error) { + contract, err := bind{{.Type}}(address, backend.(bind.ContractCaller), backend.(bind.ContractTransactor)) + if err != nil { + return nil, err + } + return &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract} }, nil + } + + // New{{.Type}}Caller creates a new read-only instance of {{.Type}}, bound to a specific deployed contract. + func New{{.Type}}Caller(address common.Address, caller bind.ContractCaller) (*{{.Type}}Caller, error) { + contract, err := bind{{.Type}}(address, caller, nil) + if err != nil { + return nil, err + } + return &{{.Type}}Caller{contract: contract}, nil + } + + // New{{.Type}}Transactor creates a new write-only instance of {{.Type}}, bound to a specific deployed contract. + func New{{.Type}}Transactor(address common.Address, transactor bind.ContractTransactor) (*{{.Type}}Transactor, error) { + contract, err := bind{{.Type}}(address, nil, transactor) + if err != nil { + return nil, err + } + return &{{.Type}}Transactor{contract: contract}, nil + } + + // bind{{.Type}} binds a generic wrapper to an already deployed contract. + func bind{{.Type}}(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor) (*bind.BoundContract, error) { + parsed, err := abi.JSON(strings.NewReader({{.Type}}ABI)) + if err != nil { + return nil, err + } + return bind.NewBoundContract(address, parsed, caller, transactor), nil + } + + {{range .Calls}} + {{if .Structured}} + // {{.Normalized.Name}}Result is the result of the {{.Normalized.Name}} invocation." + type {{.Normalized.Name}}Result struct { + {{range .Normalized.Outputs}}{{.Name}} {{bindtype .Type}} + {{end}} + } + {{end}} + + // {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}Caller) {{.Normalized.Name}}(opts *bind.CallOpts {{range .Normalized.Inputs}}, {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result,{{else}}{{range .Normalized.Outputs}}{{bindtype .Type}},{{end}}{{end}} error) { + var ( + {{if .Structured}}ret = new(*{{.Normalized.Name}}Result){{else}}{{range $i, $_ := .Normalized.Outputs}}ret{{$i}} = new({{bindtype .Type}}) + {{end}}{{end}} + ) + out := {{if .Structured}}ret{{else}}{{if eq (len .Normalized.Outputs) 1}}ret0{{else}}[]interface{}{ + {{range $i, $_ := .Normalized.Outputs}}ret{{$i}}, + {{end}} + }{{end}}{{end}} + err := _{{$contract.Type}}.contract.Call(opts, out, "{{.Original.Name}}" {{range .Normalized.Inputs}}, {{.Name}}{{end}}) + return {{if .Structured}}*ret,{{else}}{{range $i, $_ := .Normalized.Outputs}}*ret{{$i}},{{end}}{{end}} err + } + + // {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}Session) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type}},{{end}} {{end}} error) { + return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.CallOpts {{range .Normalized.Inputs}}, {{.Name}}{{end}}) + } + + // {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}CallerSession) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) ({{if .Structured}}*{{.Normalized.Name}}Result, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type}},{{end}} {{end}} error) { + return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.CallOpts {{range .Normalized.Inputs}}, {{.Name}}{{end}}) + } + {{end}} + + {{range .Transacts}} + // {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}Transactor) {{.Normalized.Name}}(opts *bind.TransactOpts {{range .Normalized.Inputs}}, {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) { + return _{{$contract.Type}}.contract.Transact(opts, "{{.Original.Name}}" {{range .Normalized.Inputs}}, {{.Name}}{{end}}) + } + + // {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}Session) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) { + return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.TransactOpts {{range $i, $_ := .Normalized.Inputs}}, {{.Name}}{{end}}) + } + + // {{.Normalized.Name}} is a paid mutator transaction binding the contract method 0x{{printf "%x" .Original.Id}}. + // + // Solidity: {{.Original.String}} + func (_{{$contract.Type}} *{{$contract.Type}}TransactorSession) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type}} {{end}}) (*types.Transaction, error) { + return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.TransactOpts {{range $i, $_ := .Normalized.Inputs}}, {{.Name}}{{end}}) + } + {{end}} +{{end}} +` diff --git a/cmd/abigen/main.go b/cmd/abigen/main.go index 227c390a6..329e9b109 100644 --- a/cmd/abigen/main.go +++ b/cmd/abigen/main.go @@ -17,53 +17,97 @@ package main import ( + "encoding/json" "flag" "fmt" "io/ioutil" "os" "github.com/ethereum/go-ethereum/accounts/abi/bind" + "github.com/ethereum/go-ethereum/common/compiler" ) 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 (default = stdout)") + + solFlag = flag.String("sol", "", "Path to the Ethereum contract Solidity source to build and bind") + solcFlag = flag.String("solc", "solc", "Solidity compiler to use if source builds are requested") + + pkgFlag = flag.String("pkg", "", "Go package name to generate the binding into") + outFlag = flag.String("out", "", "Output file for the generated binding (default = stdout)") ) func main() { - // Parse and validate the command line flags + // Parse and ensure all needed inputs are specified flag.Parse() - if *abiFlag == "" { - fmt.Printf("No contract ABI path specified (--abi)\n") + if *abiFlag == "" && *solFlag == "" { + fmt.Printf("No contract ABI (--abi) or Solidity source (--sol) specified\n") + os.Exit(-1) + } else if (*abiFlag != "" || *binFlag != "" || *typFlag != "") && *solFlag != "" { + fmt.Printf("Contract ABI (--abi), bytecode (--bin) and type (--type) flags are mutually exclusive with the Solidity source (--sol) flag\n") os.Exit(-1) } if *pkgFlag == "" { fmt.Printf("No destination Go package specified (--pkg)\n") os.Exit(-1) } - // 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) + // If the entire solidity code was specified, build and bind based on that + var ( + abis []string + bins []string + types []string + ) + if *solFlag != "" { + 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)) + if err != nil { + fmt.Printf("Failed to build Solidity contract: %v\n", err) + os.Exit(-1) + } + for name, contract := range contracts { + abi, _ := json.Marshal(contract.Info.AbiDefinition) // Flatten the compiler parse + abis = append(abis, string(abi)) + bins = append(bins, contract.Code) + types = append(types, name) + } + } else { + // Otherwise load up the ABI, optional bytecode and type name from the parameters + abi, err := ioutil.ReadFile(*abiFlag) + if err != nil { + fmt.Printf("Failed to read input ABI: %v\n", err) + os.Exit(-1) + } + abis = append(abis, string(abi)) + + 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) + } + } + bins = append(bins, string(bin)) + + kind := *typFlag + if kind == "" { + kind = *pkgFlag + } + types = append(types, kind) } // Generate the contract binding - kind := *typFlag - if kind == "" { - kind = *pkgFlag - } - code, err := bind.Bind(string(abi), string(bin), *pkgFlag, kind) + code, err := bind.Bind(types, abis, bins, *pkgFlag) if err != nil { fmt.Printf("Failed to generate ABI binding: %v\n", err) os.Exit(-1)