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Merge pull request #2405 from karalabe/abigen-default-methods 

accounts/abi/bind: surface raw wrappers to access low level ops
This commit is contained in:
Jeffrey Wilcke 2016-04-01 15:42:05 +02:00
parent 8b2aca96c5 4097478884
commit fb578f4550
3 changed files with 102 additions and 5 deletions
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9
accounts/abi/bind/base.go
View File

@ -108,8 +108,7 @@ func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string,
return c.abi.Unpack(result, method, output)
}
// Transact invokes the (paid) contract method with params as input values and
// value as the fund transfer to the contract.
// Transact invokes the (paid) contract method with params as input values.
func (c *BoundContract) Transact(opts *TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
// Otherwise pack up the parameters and invoke the contract
input, err := c.abi.Pack(method, params...)
@ -119,6 +118,12 @@ func (c *BoundContract) Transact(opts *TransactOpts, method string, params ...in
return c.transact(opts, &c.address, input)
}
// Transfer initiates a plain transaction to move funds to the contract, calling
// its default method if one is available.
func (c *BoundContract) Transfer(opts *TransactOpts) (*types.Transaction, error) {
return c.transact(opts, &c.address, nil)
}
// 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) {

45
accounts/abi/bind/bind_test.go
View File

@ -201,9 +201,9 @@ var bindTests = []struct {
`Tupler`,
`
contract Tupler {
function tuple() returns (string a, int b, bytes32 c) {
return ("Hi", 1, sha3(""));
}
function tuple() returns (string a, int b, bytes32 c) {
return ("Hi", 1, sha3(""));
}
}
`,
`606060405260dc8060106000396000f3606060405260e060020a60003504633175aae28114601a575b005b600060605260c0604052600260809081527f486900000000000000000000000000000000000000000000000000000000000060a05260017fc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a47060e0829052610100819052606060c0908152600261012081905281906101409060a09080838184600060046012f1505081517fffff000000000000000000000000000000000000000000000000000000000000169091525050604051610160819003945092505050f3`,
@ -228,6 +228,45 @@ var bindTests = []struct {
}
`,
},
// Tests that anonymous default methods can be correctly invoked
{
`Defaulter`,
`
contract Defaulter {
address public caller;
function() {
caller = msg.sender;
}
}
`,
`6060604052606a8060106000396000f360606040523615601d5760e060020a6000350463fc9c8d3981146040575b605e6000805473ffffffffffffffffffffffffffffffffffffffff191633179055565b606060005473ffffffffffffffffffffffffffffffffffffffff1681565b005b6060908152602090f3`,
`[{"constant":true,"inputs":[],"name":"caller","outputs":[{"name":"","type":"address"}],"type":"function"}]`,
`
// 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 a default method invoker contract and execute its default method
_, _, defaulter, err := DeployDefaulter(auth, sim)
if err != nil {
t.Fatalf("Failed to deploy defaulter contract: %v", err)
}
if _, err := (&DefaulterRaw{defaulter}).Transfer(auth); err != nil {
t.Fatalf("Failed to invoke default method: %v", err)
}
sim.Commit()
if caller, err := defaulter.Caller(nil); err != nil {
t.Fatalf("Failed to call address retriever: %v", err)
} else if (caller != key.Address) {
t.Fatalf("Address mismatch: have %v, want %v", caller, key.Address)
}
`,
},
}
// Tests that packages generated by the binder can be successfully compiled and

53
accounts/abi/bind/template.go
View File

@ -110,6 +110,21 @@ package {{.Package}}
TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
}
// {{.Type}}Raw is an auto generated low-level Go binding around an Ethereum contract.
type {{.Type}}Raw struct {
Contract *{{.Type}} // Generic contract binding to access the raw methods on
}
// {{.Type}}CallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
type {{.Type}}CallerRaw struct {
Contract *{{.Type}}Caller // Generic read-only contract binding to access the raw methods on
}
// {{.Type}}TransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
type {{.Type}}TransactorRaw struct {
Contract *{{.Type}}Transactor // Generic write-only contract binding to access the raw methods on
}
// 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))
@ -146,6 +161,44 @@ package {{.Package}}
return bind.NewBoundContract(address, parsed, caller, transactor), 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 (_{{$contract.Type}} *{{$contract.Type}}Raw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
return _{{$contract.Type}}.Contract.{{$contract.Type}}Caller.contract.Call(opts, result, method, params...)
}
// Transfer initiates a plain transaction to move funds to the contract, calling
// its default method if one is available.
func (_{{$contract.Type}} *{{$contract.Type}}Raw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.{{$contract.Type}}Transactor.contract.Transfer(opts)
}
// Transact invokes the (paid) contract method with params as input values.
func (_{{$contract.Type}} *{{$contract.Type}}Raw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.{{$contract.Type}}Transactor.contract.Transact(opts, method, params...)
}
// 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 (_{{$contract.Type}} *{{$contract.Type}}CallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
return _{{$contract.Type}}.Contract.contract.Call(opts, result, method, params...)
}
// Transfer initiates a plain transaction to move funds to the contract, calling
// its default method if one is available.
func (_{{$contract.Type}} *{{$contract.Type}}TransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.contract.Transfer(opts)
}
// Transact invokes the (paid) contract method with params as input values.
func (_{{$contract.Type}} *{{$contract.Type}}TransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.contract.Transact(opts, method, params...)
}
{{range .Calls}}
// {{.Normalized.Name}} is a free data retrieval call binding the contract method 0x{{printf "%x" .Original.Id}}.
//