go-ethereum/accounts/abi/abigen/source.go.tpl
jwasinger 64bd21393e
cmd/abigen, accounts/abi/bind: implement abigen version 2 (#31379)
This PR implements a new version of the abigen utility (v2) which exists
along with the pre-existing v1 version.

Abigen is a utility command provided by go-ethereum that, given a
solidity contract ABI definition, will generate Go code to transact/call
the contract methods, converting the method parameters/results and
structures defined in the contract into corresponding Go types. This is
useful for preventing the need to write custom boilerplate code for
contract interactions.

Methods in the generated bindings perform encoding between Go types and
Solidity ABI-encoded packed bytecode, as well as some action (e.g.
`eth_call` or creating and submitting a transaction). This limits the
flexibility of how the generated bindings can be used, and prevents
easily adding new functionality, as it will make the generated bindings
larger for each feature added.

Abigen v2 was conceived of by the observation that the only
functionality that generated Go bindings ought to perform is conversion
between Go types and ABI-encoded packed data. Go-ethereum already
provides various APIs which in conjunction with conversion methods
generated in v2 bindings can cover all functionality currently provided
by v1, and facilitate all other previously-desired use-cases.

## Generating Bindings

To generate contract bindings using abigen v2, invoke the `abigen`
command with the `--v2` flag. The functionality of all other flags is
preserved between the v2 and v1 versions.

## What is Generated in the Bindings

The execution of `abigen --v2` generates Go code containing methods
which convert between Go types and corresponding ABI-encoded data
expected by the contract. For each input-accepting contract method and
the constructor, a "packing" method is generated in the binding which
converts from Go types to the corresponding packed solidity expected by
the contract. If a method returns output, an "unpacking" method is
generated to convert this output from ABI-encoded data to the
corresponding Go types.

For contracts which emit events, an unpacking method is defined for each
event to unpack the corresponding raw log to the Go type that it
represents.

Likewise, where custom errors are defined by contracts, an unpack method
is generated to unpack raw error data into a Go type.

## Using the Generated Bindings

For a smooth user-experience, abigen v2 comes with a number of utility
functions to be used in conjunction with the generated bindings for
performing common contract interaction use-cases. These include:

* filtering for historical logs of a given topic
* watching the chain for emission of logs with a given topic
* contract deployment methods
* Call/Transact methods

https://geth.ethereum.org will be updated to include a new tutorial page
for abigen v2 with full code examples. The page currently exists in a
PR: https://github.com/ethereum/go-ethereum/pull/31390 .

There are also extensive examples of interactions with contract bindings
in [test
cases](cc855c7ede/accounts/abi/bind/v2/lib_test.go)
provided with this PR.

---------

Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>
Co-authored-by: Felix Lange <fjl@twurst.com>
2025-03-17 15:56:55 +01:00

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// Code generated - DO NOT EDIT.
// This file is a generated binding and any manual changes will be lost.
package {{.Package}}
import (
"math/big"
"strings"
"errors"
ethereum "github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts/abi"
"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/event"
)
// Reference imports to suppress errors if they are not otherwise used.
var (
_ = errors.New
_ = big.NewInt
_ = strings.NewReader
_ = ethereum.NotFound
_ = bind.Bind
_ = common.Big1
_ = types.BloomLookup
_ = event.NewSubscription
_ = abi.ConvertType
)
{{$structs := .Structs}}
{{range $structs}}
// {{.Name}} is an auto generated low-level Go binding around an user-defined struct.
type {{.Name}} struct {
{{range $field := .Fields}}
{{$field.Name}} {{$field.Type}}{{end}}
}
{{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.
// 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 = {{.Type}}MetaData.Sigs
{{end}}
{{if .InputBin}}
// {{.Type}}Bin is the compiled bytecode used for deploying new contracts.
// 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 := {{.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.ReplaceAll({{$contract.Type}}Bin, "__${{$pattern}}$__", {{decapitalise $name}}Addr.String()[2:])
{{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
}
return address, tx, &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract}, {{.Type}}Filterer: {{.Type}}Filterer{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}}Filterer // Log filterer for contract events
}
// {{.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}}Filterer is an auto generated log filtering Go binding around an Ethereum contract events.
type {{.Type}}Filterer 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
}
// {{.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, backend, backend)
if err != nil {
return nil, err
}
return &{{.Type}}{ {{.Type}}Caller: {{.Type}}Caller{contract: contract}, {{.Type}}Transactor: {{.Type}}Transactor{contract: contract}, {{.Type}}Filterer: {{.Type}}Filterer{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, 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, nil)
if err != nil {
return nil, err
}
return &{{.Type}}Transactor{contract: contract}, nil
}
// New{{.Type}}Filterer creates a new log filterer instance of {{.Type}}, bound to a specific deployed contract.
func New{{.Type}}Filterer(address common.Address, filterer bind.ContractFilterer) (*{{.Type}}Filterer, error) {
contract, err := bind{{.Type}}(address, nil, nil, filterer)
if err != nil {
return nil, err
}
return &{{.Type}}Filterer{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, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
parsed, err := {{.Type}}MetaData.GetAbi()
if err != nil {
return nil, err
}
return bind.NewBoundContract(address, *parsed, caller, transactor, filterer), 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}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Caller) {{.Normalized.Name}}(opts *bind.CallOpts {{range .Normalized.Inputs}}, {{.Name}} {{bindtype .Type $structs}} {{end}}) ({{if .Structured}}struct{ {{range .Normalized.Outputs}}{{.Name}} {{bindtype .Type $structs}};{{end}} },{{else}}{{range .Normalized.Outputs}}{{bindtype .Type $structs}},{{end}}{{end}} error) {
var out []interface{}
err := _{{$contract.Type}}.contract.Call(opts, &out, "{{.Original.Name}}" {{range .Normalized.Inputs}}, {{.Name}}{{end}})
{{if .Structured}}
outstruct := new(struct{ {{range .Normalized.Outputs}} {{.Name}} {{bindtype .Type $structs}}; {{end}} })
if err != nil {
return *outstruct, err
}
{{range $i, $t := .Normalized.Outputs}}
outstruct.{{.Name}} = *abi.ConvertType(out[{{$i}}], new({{bindtype .Type $structs}})).(*{{bindtype .Type $structs}}){{end}}
return *outstruct, err
{{else}}
if err != nil {
return {{range $i, $_ := .Normalized.Outputs}}*new({{bindtype .Type $structs}}), {{end}} err
}
{{range $i, $t := .Normalized.Outputs}}
out{{$i}} := *abi.ConvertType(out[{{$i}}], new({{bindtype .Type $structs}})).(*{{bindtype .Type $structs}}){{end}}
return {{range $i, $t := .Normalized.Outputs}}out{{$i}}, {{end}} err
{{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}}Session) {{.Normalized.Name}}({{range $i, $_ := .Normalized.Inputs}}{{if ne $i 0}},{{end}} {{.Name}} {{bindtype .Type $structs}} {{end}}) ({{if .Structured}}struct{ {{range .Normalized.Outputs}}{{.Name}} {{bindtype .Type $structs}};{{end}} }, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type $structs}},{{end}} {{end}} error) {
return _{{$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 $structs}} {{end}}) ({{if .Structured}}struct{ {{range .Normalized.Outputs}}{{.Name}} {{bindtype .Type $structs}};{{end}} }, {{else}} {{range .Normalized.Outputs}}{{bindtype .Type $structs}},{{end}} {{end}} error) {
return _{{$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 $structs}} {{end}}) (*types.Transaction, error) {
return _{{$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 $structs}} {{end}}) (*types.Transaction, error) {
return _{{$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 $structs}} {{end}}) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.{{.Normalized.Name}}(&_{{$contract.Type}}.TransactOpts {{range $i, $_ := .Normalized.Inputs}}, {{.Name}}{{end}})
}
{{end}}
{{if .Fallback}}
// Fallback is a paid mutator transaction binding the contract fallback function.
//
// Solidity: {{.Fallback.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Transactor) Fallback(opts *bind.TransactOpts, calldata []byte) (*types.Transaction, error) {
return _{{$contract.Type}}.contract.RawTransact(opts, calldata)
}
// Fallback is a paid mutator transaction binding the contract fallback function.
//
// Solidity: {{.Fallback.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Session) Fallback(calldata []byte) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.Fallback(&_{{$contract.Type}}.TransactOpts, calldata)
}
// Fallback is a paid mutator transaction binding the contract fallback function.
//
// Solidity: {{.Fallback.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}TransactorSession) Fallback(calldata []byte) (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.Fallback(&_{{$contract.Type}}.TransactOpts, calldata)
}
{{end}}
{{if .Receive}}
// Receive is a paid mutator transaction binding the contract receive function.
//
// Solidity: {{.Receive.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Transactor) Receive(opts *bind.TransactOpts) (*types.Transaction, error) {
return _{{$contract.Type}}.contract.RawTransact(opts, nil) // calldata is disallowed for receive function
}
// Receive is a paid mutator transaction binding the contract receive function.
//
// Solidity: {{.Receive.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Session) Receive() (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.Receive(&_{{$contract.Type}}.TransactOpts)
}
// Receive is a paid mutator transaction binding the contract receive function.
//
// Solidity: {{.Receive.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}TransactorSession) Receive() (*types.Transaction, error) {
return _{{$contract.Type}}.Contract.Receive(&_{{$contract.Type}}.TransactOpts)
}
{{end}}
{{range .Events}}
// {{$contract.Type}}{{.Normalized.Name}}Iterator is returned from Filter{{.Normalized.Name}} and is used to iterate over the raw logs and unpacked data for {{.Normalized.Name}} events raised by the {{$contract.Type}} contract.
type {{$contract.Type}}{{.Normalized.Name}}Iterator struct {
Event *{{$contract.Type}}{{.Normalized.Name}} // Event containing the contract specifics and raw log
contract *bind.BoundContract // Generic contract to use for unpacking event data
event string // Event name to use for unpacking event data
logs chan types.Log // Log channel receiving the found contract events
sub ethereum.Subscription // Subscription for errors, completion and termination
done bool // Whether the subscription completed delivering logs
fail error // Occurred error to stop iteration
}
// Next advances the iterator to the subsequent event, returning whether there
// are any more events found. In case of a retrieval or parsing error, false is
// returned and Error() can be queried for the exact failure.
func (it *{{$contract.Type}}{{.Normalized.Name}}Iterator) Next() bool {
// If the iterator failed, stop iterating
if (it.fail != nil) {
return false
}
// If the iterator completed, deliver directly whatever's available
if (it.done) {
select {
case log := <-it.logs:
it.Event = new({{$contract.Type}}{{.Normalized.Name}})
if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
it.fail = err
return false
}
it.Event.Raw = log
return true
default:
return false
}
}
// Iterator still in progress, wait for either a data or an error event
select {
case log := <-it.logs:
it.Event = new({{$contract.Type}}{{.Normalized.Name}})
if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
it.fail = err
return false
}
it.Event.Raw = log
return true
case err := <-it.sub.Err():
it.done = true
it.fail = err
return it.Next()
}
}
// Error returns any retrieval or parsing error occurred during filtering.
func (it *{{$contract.Type}}{{.Normalized.Name}}Iterator) Error() error {
return it.fail
}
// Close terminates the iteration process, releasing any pending underlying
// resources.
func (it *{{$contract.Type}}{{.Normalized.Name}}Iterator) Close() error {
it.sub.Unsubscribe()
return nil
}
// {{$contract.Type}}{{.Normalized.Name}} represents a {{.Normalized.Name}} event raised by the {{$contract.Type}} contract.
type {{$contract.Type}}{{.Normalized.Name}} struct { {{range .Normalized.Inputs}}
{{capitalise .Name}} {{if .Indexed}}{{bindtopictype .Type $structs}}{{else}}{{bindtype .Type $structs}}{{end}}; {{end}}
Raw types.Log // Blockchain specific contextual infos
}
// Filter{{.Normalized.Name}} is a free log retrieval operation binding the contract event 0x{{printf "%x" .Original.ID}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Filterer) Filter{{.Normalized.Name}}(opts *bind.FilterOpts{{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} []{{bindtype .Type $structs}}{{end}}{{end}}) (*{{$contract.Type}}{{.Normalized.Name}}Iterator, error) {
{{range .Normalized.Inputs}}
{{if .Indexed}}var {{.Name}}Rule []interface{}
for _, {{.Name}}Item := range {{.Name}} {
{{.Name}}Rule = append({{.Name}}Rule, {{.Name}}Item)
}{{end}}{{end}}
logs, sub, err := _{{$contract.Type}}.contract.FilterLogs(opts, "{{.Original.Name}}"{{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}}Rule{{end}}{{end}})
if err != nil {
return nil, err
}
return &{{$contract.Type}}{{.Normalized.Name}}Iterator{contract: _{{$contract.Type}}.contract, event: "{{.Original.Name}}", logs: logs, sub: sub}, nil
}
// Watch{{.Normalized.Name}} is a free log subscription operation binding the contract event 0x{{printf "%x" .Original.ID}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Filterer) Watch{{.Normalized.Name}}(opts *bind.WatchOpts, sink chan<- *{{$contract.Type}}{{.Normalized.Name}}{{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} []{{bindtype .Type $structs}}{{end}}{{end}}) (event.Subscription, error) {
{{range .Normalized.Inputs}}
{{if .Indexed}}var {{.Name}}Rule []interface{}
for _, {{.Name}}Item := range {{.Name}} {
{{.Name}}Rule = append({{.Name}}Rule, {{.Name}}Item)
}{{end}}{{end}}
logs, sub, err := _{{$contract.Type}}.contract.WatchLogs(opts, "{{.Original.Name}}"{{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}}Rule{{end}}{{end}})
if err != nil {
return nil, err
}
return event.NewSubscription(func(quit <-chan struct{}) error {
defer sub.Unsubscribe()
for {
select {
case log := <-logs:
// New log arrived, parse the event and forward to the user
event := new({{$contract.Type}}{{.Normalized.Name}})
if err := _{{$contract.Type}}.contract.UnpackLog(event, "{{.Original.Name}}", log); err != nil {
return err
}
event.Raw = log
select {
case sink <- event:
case err := <-sub.Err():
return err
case <-quit:
return nil
}
case err := <-sub.Err():
return err
case <-quit:
return nil
}
}
}), nil
}
// Parse{{.Normalized.Name}} is a log parse operation binding the contract event 0x{{printf "%x" .Original.ID}}.
//
// Solidity: {{.Original.String}}
func (_{{$contract.Type}} *{{$contract.Type}}Filterer) Parse{{.Normalized.Name}}(log types.Log) (*{{$contract.Type}}{{.Normalized.Name}}, error) {
event := new({{$contract.Type}}{{.Normalized.Name}})
if err := _{{$contract.Type}}.contract.UnpackLog(event, "{{.Original.Name}}", log); err != nil {
return nil, err
}
event.Raw = log
return event, nil
}
{{end}}
{{end}}