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go-ethereum/accounts/abi/abigen/testdata/v2/tuple.go.txt
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 via abigen V2 - DO NOT EDIT.
// This file is a generated binding and any manual changes will be lost.
package bindtests
import (
"bytes"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/accounts/abi/bind/v2"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// Reference imports to suppress errors if they are not otherwise used.
var (
_ = bytes.Equal
_ = errors.New
_ = big.NewInt
_ = common.Big1
_ = types.BloomLookup
_ = abi.ConvertType
)
// TupleP is an auto generated low-level Go binding around an user-defined struct.
type TupleP struct {
X uint8
Y uint8
}
// TupleQ is an auto generated low-level Go binding around an user-defined struct.
type TupleQ struct {
X uint16
Y uint16
}
// TupleS is an auto generated low-level Go binding around an user-defined struct.
type TupleS struct {
A *big.Int
B []*big.Int
C []TupleT
}
// TupleT is an auto generated low-level Go binding around an user-defined struct.
type TupleT struct {
X *big.Int
Y *big.Int
}
// TupleMetaData contains all meta data concerning the Tuple contract.
var TupleMetaData = bind.MetaData{
ABI: "[{\"anonymous\":false,\"inputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"indexed\":false,\"internalType\":\"structTuple.S\",\"name\":\"a\",\"type\":\"tuple\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"indexed\":false,\"internalType\":\"structTuple.T[2][]\",\"name\":\"b\",\"type\":\"tuple[2][]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"indexed\":false,\"internalType\":\"structTuple.T[][2]\",\"name\":\"c\",\"type\":\"tuple[][2]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"indexed\":false,\"internalType\":\"structTuple.S[]\",\"name\":\"d\",\"type\":\"tuple[]\"},{\"indexed\":false,\"internalType\":\"uint256[]\",\"name\":\"e\",\"type\":\"uint256[]\"}],\"name\":\"TupleEvent\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"components\":[{\"internalType\":\"uint8\",\"name\":\"x\",\"type\":\"uint8\"},{\"internalType\":\"uint8\",\"name\":\"y\",\"type\":\"uint8\"}],\"indexed\":false,\"internalType\":\"structTuple.P[]\",\"name\":\"\",\"type\":\"tuple[]\"}],\"name\":\"TupleEvent2\",\"type\":\"event\"},{\"constant\":true,\"inputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S\",\"name\":\"a\",\"type\":\"tuple\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[2][]\",\"name\":\"b\",\"type\":\"tuple[2][]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[][2]\",\"name\":\"c\",\"type\":\"tuple[][2]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S[]\",\"name\":\"d\",\"type\":\"tuple[]\"},{\"internalType\":\"uint256[]\",\"name\":\"e\",\"type\":\"uint256[]\"}],\"name\":\"func1\",\"outputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S\",\"name\":\"\",\"type\":\"tuple\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[2][]\",\"name\":\"\",\"type\":\"tuple[2][]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[][2]\",\"name\":\"\",\"type\":\"tuple[][2]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S[]\",\"name\":\"\",\"type\":\"tuple[]\"},{\"internalType\":\"uint256[]\",\"name\":\"\",\"type\":\"uint256[]\"}],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S\",\"name\":\"a\",\"type\":\"tuple\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[2][]\",\"name\":\"b\",\"type\":\"tuple[2][]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[][2]\",\"name\":\"c\",\"type\":\"tuple[][2]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"a\",\"type\":\"uint256\"},{\"internalType\":\"uint256[]\",\"name\":\"b\",\"type\":\"uint256[]\"},{\"components\":[{\"internalType\":\"uint256\",\"name\":\"x\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"y\",\"type\":\"uint256\"}],\"internalType\":\"structTuple.T[]\",\"name\":\"c\",\"type\":\"tuple[]\"}],\"internalType\":\"structTuple.S[]\",\"name\":\"d\",\"type\":\"tuple[]\"},{\"internalType\":\"uint256[]\",\"name\":\"e\",\"type\":\"uint256[]\"}],\"name\":\"func2\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"components\":[{\"internalType\":\"uint16\",\"name\":\"x\",\"type\":\"uint16\"},{\"internalType\":\"uint16\",\"name\":\"y\",\"type\":\"uint16\"}],\"internalType\":\"structTuple.Q[]\",\"name\":\"\",\"type\":\"tuple[]\"}],\"name\":\"func3\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"pure\",\"type\":\"function\"}]",
ID: "96ee1e2b1b89f8c495f200e4956278a4d4",
Bin: 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}
// Tuple is an auto generated Go binding around an Ethereum contract.
type Tuple struct {
abi abi.ABI
}
// NewTuple creates a new instance of Tuple.
func NewTuple() *Tuple {
parsed, err := TupleMetaData.ParseABI()
if err != nil {
panic(errors.New("invalid ABI: " + err.Error()))
}
return &Tuple{abi: *parsed}
}
// Instance creates a wrapper for a deployed contract instance at the given address.
// Use this to create the instance object passed to abigen v2 library functions Call, Transact, etc.
func (c *Tuple) Instance(backend bind.ContractBackend, addr common.Address) *bind.BoundContract {
return bind.NewBoundContract(addr, c.abi, backend, backend, backend)
}
// PackFunc1 is the Go binding used to pack the parameters required for calling
// the contract method with ID 0x443c79b4.
//
// Solidity: function func1((uint256,uint256[],(uint256,uint256)[]) a, (uint256,uint256)[2][] b, (uint256,uint256)[][2] c, (uint256,uint256[],(uint256,uint256)[])[] d, uint256[] e) pure returns((uint256,uint256[],(uint256,uint256)[]), (uint256,uint256)[2][], (uint256,uint256)[][2], (uint256,uint256[],(uint256,uint256)[])[], uint256[])
func (tuple *Tuple) PackFunc1(a TupleS, b [][2]TupleT, c [2][]TupleT, d []TupleS, e []*big.Int) []byte {
enc, err := tuple.abi.Pack("func1", a, b, c, d, e)
if err != nil {
panic(err)
}
return enc
}
// Func1Output serves as a container for the return parameters of contract
// method Func1.
type Func1Output struct {
Arg0 TupleS
Arg1 [][2]TupleT
Arg2 [2][]TupleT
Arg3 []TupleS
Arg4 []*big.Int
}
// UnpackFunc1 is the Go binding that unpacks the parameters returned
// from invoking the contract method with ID 0x443c79b4.
//
// Solidity: function func1((uint256,uint256[],(uint256,uint256)[]) a, (uint256,uint256)[2][] b, (uint256,uint256)[][2] c, (uint256,uint256[],(uint256,uint256)[])[] d, uint256[] e) pure returns((uint256,uint256[],(uint256,uint256)[]), (uint256,uint256)[2][], (uint256,uint256)[][2], (uint256,uint256[],(uint256,uint256)[])[], uint256[])
func (tuple *Tuple) UnpackFunc1(data []byte) (Func1Output, error) {
out, err := tuple.abi.Unpack("func1", data)
outstruct := new(Func1Output)
if err != nil {
return *outstruct, err
}
outstruct.Arg0 = *abi.ConvertType(out[0], new(TupleS)).(*TupleS)
outstruct.Arg1 = *abi.ConvertType(out[1], new([][2]TupleT)).(*[][2]TupleT)
outstruct.Arg2 = *abi.ConvertType(out[2], new([2][]TupleT)).(*[2][]TupleT)
outstruct.Arg3 = *abi.ConvertType(out[3], new([]TupleS)).(*[]TupleS)
outstruct.Arg4 = *abi.ConvertType(out[4], new([]*big.Int)).(*[]*big.Int)
return *outstruct, err
}
// PackFunc2 is the Go binding used to pack the parameters required for calling
// the contract method with ID 0xd0062cdd.
//
// Solidity: function func2((uint256,uint256[],(uint256,uint256)[]) a, (uint256,uint256)[2][] b, (uint256,uint256)[][2] c, (uint256,uint256[],(uint256,uint256)[])[] d, uint256[] e) returns()
func (tuple *Tuple) PackFunc2(a TupleS, b [][2]TupleT, c [2][]TupleT, d []TupleS, e []*big.Int) []byte {
enc, err := tuple.abi.Pack("func2", a, b, c, d, e)
if err != nil {
panic(err)
}
return enc
}
// PackFunc3 is the Go binding used to pack the parameters required for calling
// the contract method with ID 0xe4d9a43b.
//
// Solidity: function func3((uint16,uint16)[] ) pure returns()
func (tuple *Tuple) PackFunc3(arg0 []TupleQ) []byte {
enc, err := tuple.abi.Pack("func3", arg0)
if err != nil {
panic(err)
}
return enc
}
// TupleTupleEvent represents a TupleEvent event raised by the Tuple contract.
type TupleTupleEvent struct {
A TupleS
B [][2]TupleT
C [2][]TupleT
D []TupleS
E []*big.Int
Raw *types.Log // Blockchain specific contextual infos
}
const TupleTupleEventEventName = "TupleEvent"
// ContractEventName returns the user-defined event name.
func (TupleTupleEvent) ContractEventName() string {
return TupleTupleEventEventName
}
// UnpackTupleEventEvent is the Go binding that unpacks the event data emitted
// by contract.
//
// Solidity: event TupleEvent((uint256,uint256[],(uint256,uint256)[]) a, (uint256,uint256)[2][] b, (uint256,uint256)[][2] c, (uint256,uint256[],(uint256,uint256)[])[] d, uint256[] e)
func (tuple *Tuple) UnpackTupleEventEvent(log *types.Log) (*TupleTupleEvent, error) {
event := "TupleEvent"
if log.Topics[0] != tuple.abi.Events[event].ID {
return nil, errors.New("event signature mismatch")
}
out := new(TupleTupleEvent)
if len(log.Data) > 0 {
if err := tuple.abi.UnpackIntoInterface(out, event, log.Data); err != nil {
return nil, err
}
}
var indexed abi.Arguments
for _, arg := range tuple.abi.Events[event].Inputs {
if arg.Indexed {
indexed = append(indexed, arg)
}
}
if err := abi.ParseTopics(out, indexed, log.Topics[1:]); err != nil {
return nil, err
}
out.Raw = log
return out, nil
}
// TupleTupleEvent2 represents a TupleEvent2 event raised by the Tuple contract.
type TupleTupleEvent2 struct {
Arg0 []TupleP
Raw *types.Log // Blockchain specific contextual infos
}
const TupleTupleEvent2EventName = "TupleEvent2"
// ContractEventName returns the user-defined event name.
func (TupleTupleEvent2) ContractEventName() string {
return TupleTupleEvent2EventName
}
// UnpackTupleEvent2Event is the Go binding that unpacks the event data emitted
// by contract.
//
// Solidity: event TupleEvent2((uint8,uint8)[] arg0)
func (tuple *Tuple) UnpackTupleEvent2Event(log *types.Log) (*TupleTupleEvent2, error) {
event := "TupleEvent2"
if log.Topics[0] != tuple.abi.Events[event].ID {
return nil, errors.New("event signature mismatch")
}
out := new(TupleTupleEvent2)
if len(log.Data) > 0 {
if err := tuple.abi.UnpackIntoInterface(out, event, log.Data); err != nil {
return nil, err
}
}
var indexed abi.Arguments
for _, arg := range tuple.abi.Events[event].Inputs {
if arg.Indexed {
indexed = append(indexed, arg)
}
}
if err := abi.ParseTopics(out, indexed, log.Topics[1:]); err != nil {
return nil, err
}
out.Raw = log
return out, nil
}
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