Generieren Sie einen Golang-Bindungscode für solide Verträge

Einführung

Wenn Sie Golang verwenden, um eine Verbindung zu Ethreum herzustellen, können Sie auf einfache Weise verbindlichen Code generieren, mit dem die intelligenten Verträge von Ethereum direkt von Golang aus ausgeführt werden. Von vor zwei Jahren bis zum letzten Jahr habe ich diese Methode implementiert, als ich einen Treuhandservice mit dem intelligenten Vertrag von Ethereum erstellt habe.

Lass es uns versuchen

Notwendige Software

Intelligenter Vertrag zur Generierung verbindlichen Codes

Solidity-Quellcode für einen Standard-ERC20-Smart-Vertrag.

Erc20.sol

pragma solidity ^0.4.24;

contract ERC20 {
    string public constant name = "";
    string public constant symbol = "";
    uint8 public constant decimals = 0;

    function totalSupply() public constant returns (uint);
    function balanceOf(address tokenOwner) public constant returns (uint balance);
    function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);
    function transferFrom(address from, address to, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}

Generierung von Bindungscode

Sobald wir aus Solidität Abi und aus Abi Golang-Bindungen erzeugen.

solidity -> abi (Erc20_sol_ERC20.Abi generieren)
$ solcjs --abi Erc20.sol

abi ->Golangbindung(Erc20.Generieren Sie go)
$ abigen --abi Erc20_sol_ERC20.abi -pkg contract -out Erc20.go

Generierte Methode

In Erc20.go wird eine Methode generiert, die der Soliditätsschnittstelle folgt.

func (_Erc20 *Erc20Raw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
func (_Erc20 *Erc20Raw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
func (_Erc20 *Erc20Raw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
func (_Erc20 *Erc20CallerRaw) Call(opts *bind.CallOpts, result interface{}, method string, params ...interface{}) error {
func (_Erc20 *Erc20TransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
func (_Erc20 *Erc20TransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
func (_Erc20 *Erc20Caller) Allowance(opts *bind.CallOpts, tokenOwner common.Address, spender common.Address) (*big.Int, error) {
func (_Erc20 *Erc20Session) Allowance(tokenOwner common.Address, spender common.Address) (*big.Int, error) {
func (_Erc20 *Erc20CallerSession) Allowance(tokenOwner common.Address, spender common.Address) (*big.Int, error) {
func (_Erc20 *Erc20Caller) BalanceOf(opts *bind.CallOpts, tokenOwner common.Address) (*big.Int, error) {
func (_Erc20 *Erc20Session) BalanceOf(tokenOwner common.Address) (*big.Int, error) {
func (_Erc20 *Erc20CallerSession) BalanceOf(tokenOwner common.Address) (*big.Int, error) {
func (_Erc20 *Erc20Caller) Decimals(opts *bind.CallOpts) (uint8, error) {
func (_Erc20 *Erc20Session) Decimals() (uint8, error) {
func (_Erc20 *Erc20CallerSession) Decimals() (uint8, error) {
func (_Erc20 *Erc20Caller) Name(opts *bind.CallOpts) (string, error) {
func (_Erc20 *Erc20Session) Name() (string, error) {
func (_Erc20 *Erc20CallerSession) Name() (string, error) {
func (_Erc20 *Erc20Caller) Symbol(opts *bind.CallOpts) (string, error) {
func (_Erc20 *Erc20Session) Symbol() (string, error) {
func (_Erc20 *Erc20CallerSession) Symbol() (string, error) {
func (_Erc20 *Erc20Caller) TotalSupply(opts *bind.CallOpts) (*big.Int, error) {
func (_Erc20 *Erc20Session) TotalSupply() (*big.Int, error) {
func (_Erc20 *Erc20CallerSession) TotalSupply() (*big.Int, error) {
func (_Erc20 *Erc20Transactor) Approve(opts *bind.TransactOpts, spender common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20Session) Approve(spender common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20TransactorSession) Approve(spender common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20Transactor) Transfer(opts *bind.TransactOpts, to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20Session) Transfer(to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20TransactorSession) Transfer(to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20Transactor) TransferFrom(opts *bind.TransactOpts, from common.Address, to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20Session) TransferFrom(from common.Address, to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (_Erc20 *Erc20TransactorSession) TransferFrom(from common.Address, to common.Address, tokens *big.Int) (*types.Transaction, error) {
func (it *Erc20ApprovalIterator) Next() bool {
func (it *Erc20ApprovalIterator) Error() error {
func (it *Erc20ApprovalIterator) Close() error {
func (_Erc20 *Erc20Filterer) FilterApproval(opts *bind.FilterOpts, tokenOwner []common.Address, spender []common.Address) (*Erc20ApprovalIterator, error) {
func (_Erc20 *Erc20Filterer) WatchApproval(opts *bind.WatchOpts, sink chan<- *Erc20Approval, tokenOwner []common.Address, spender []common.Address) (event.Subscription, error) {
func (it *Erc20TransferIterator) Next() bool {
func (it *Erc20TransferIterator) Error() error {
func (it *Erc20TransferIterator) Close() error {
func (_Erc20 *Erc20Filterer) FilterTransfer(opts *bind.FilterOpts, from []common.Address, to []common.Address) (*Erc20TransferIterator, error) {
func (_Erc20 *Erc20Filterer) WatchTransfer(opts *bind.WatchOpts, sink chan<- *Erc20Transfer, from []common.Address, to []common.Address) (event.Subscription, error) {

ERC20 BalanceOf () Ausführungsbeispiel von Golang

Jetzt können Sie problemlos intelligente Verträge von Golang aus ausführen.

client, _ := ethclient.Dial("Ethereum-Verbindungs-URL(infura.io etc.)")
erc20, _ := contract.NewErc20("Adresse des Vertrages(type:common.Address)", client)
balance, _ := erc20.BalanceOf(&bind.CallOpts{}, "Adresse, an der Sie den Kontostand überprüfen möchten(type:common.Address)")