diff --git a/accounts/abi/bind/base.go b/accounts/abi/bind/base.go index 25757f1d67fd3..6ddce04adafe5 100644 --- a/accounts/abi/bind/base.go +++ b/accounts/abi/bind/base.go @@ -21,6 +21,8 @@ import ( "errors" "fmt" "math/big" + "strings" + "sync" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" @@ -76,6 +78,29 @@ type WatchOpts struct { Context context.Context // Network context to support cancellation and timeouts (nil = no timeout) } +// MetaData collects all metadata for a bound contract. +type MetaData struct { + mu sync.Mutex + Sigs map[string]string + Bin string + ABI string + ab *abi.ABI +} + +func (m *MetaData) GetAbi() (*abi.ABI, error) { + m.mu.Lock() + defer m.mu.Unlock() + if m.ab != nil { + return m.ab, nil + } + if parsed, err := abi.JSON(strings.NewReader(m.ABI)); err != nil { + return nil, err + } else { + m.ab = &parsed + } + return m.ab, nil +} + // BoundContract is the base wrapper object that reflects a contract on the // Ethereum network. It contains a collection of methods that are used by the // higher level contract bindings to operate. diff --git a/accounts/abi/bind/template.go b/accounts/abi/bind/template.go index e9bdd3d4149b3..492bad8c577fc 100644 --- a/accounts/abi/bind/template.go +++ b/accounts/abi/bind/template.go @@ -90,6 +90,7 @@ package {{.Package}} import ( "math/big" "strings" + "errors" ethereum "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" @@ -101,6 +102,7 @@ import ( // Reference imports to suppress errors if they are not otherwise used. var ( + _ = errors.New _ = big.NewInt _ = strings.NewReader _ = ethereum.NotFound @@ -120,32 +122,48 @@ var ( {{end}} {{range $contract := .Contracts}} + // {{.Type}}MetaData contains all meta data concerning the {{.Type}} contract. + var {{.Type}}MetaData = &bind.MetaData{ + ABI: "{{.InputABI}}", + {{if $contract.FuncSigs -}} + Sigs: map[string]string{ + {{range $strsig, $binsig := .FuncSigs}}"{{$binsig}}": "{{$strsig}}", + {{end}} + }, + {{end -}} + {{if .InputBin -}} + Bin: "0x{{.InputBin}}", + {{end}} + } // {{.Type}}ABI is the input ABI used to generate the binding from. - const {{.Type}}ABI = "{{.InputABI}}" + // Deprecated: Use {{.Type}}MetaData.ABI instead. + var {{.Type}}ABI = {{.Type}}MetaData.ABI {{if $contract.FuncSigs}} + // Deprecated: Use {{.Type}}MetaData.Sigs instead. // {{.Type}}FuncSigs maps the 4-byte function signature to its string representation. - var {{.Type}}FuncSigs = map[string]string{ - {{range $strsig, $binsig := .FuncSigs}}"{{$binsig}}": "{{$strsig}}", - {{end}} - } + var {{.Type}}FuncSigs = {{.Type}}MetaData.Sigs {{end}} {{if .InputBin}} // {{.Type}}Bin is the compiled bytecode used for deploying new contracts. - var {{.Type}}Bin = "0x{{.InputBin}}" + // Deprecated: Use {{.Type}}MetaData.Bin instead. + var {{.Type}}Bin = {{.Type}}MetaData.Bin // 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 $structs}}{{end}}) (common.Address, *types.Transaction, *{{.Type}}, error) { - parsed, err := abi.JSON(strings.NewReader({{.Type}}ABI)) + parsed, err := {{.Type}}MetaData.GetAbi() if err != nil { return common.Address{}, nil, nil, err } + if parsed == nil { + return common.Address{}, nil, nil, errors.New("GetABI returned nil") + } {{range $pattern, $name := .Libraries}} {{decapitalise $name}}Addr, _, _, _ := Deploy{{capitalise $name}}(auth, backend) {{$contract.Type}}Bin = strings.Replace({{$contract.Type}}Bin, "__${{$pattern}}$__", {{decapitalise $name}}Addr.String()[2:], -1) {{end}} - address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex({{.Type}}Bin), backend {{range .Constructor.Inputs}}, {{.Name}}{{end}}) + 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 }