以太坊系列之十六：golang进行智能合约开发

水莹儿

package main　　import (
　　"fmt"
　　"log"
　　"math/big"
　　"strings"
　　"time"
　　"github.com/ethereum/go-ethereum/accounts/abi/bind"
　　"github.com/ethereum/go-ethereum/ethclient"
　　"token-contract/mytoken"
　　)
　　const key = `
　　{
　　"address": "1a9ec3b0b807464e6d3398a59d6b0a369bf422fa",
　　"crypto": {
　　"cipher": "aes-128-ctr",
　　"ciphertext": "a471054846fb03e3e271339204420806334d1f09d6da40605a1a152e0d8e35f3",
　　"cipherparams": {
　　"iv": "44c5095dc698392c55a65aae46e0b5d9"
　　},
　　"kdf": "scrypt",
　　"kdfparams": {
　　"dklen": 32,
　　"n": 262144,
　　"p": 1,
　　"r": 8,
　　"salt": "e0a5fbaecaa3e75e20bccf61ee175141f3597d3b1bae6a28fe09f3507e63545e"
　　},
　　"mac": "cb3f62975cf6e7dfb454c2973bdd4a59f87262956d5534cdc87fb35703364043"
　　},
　　"id": "e08301fb-a263-4643-9c2b-d28959f66d6a",
　　"version": 3
　　}
　　`
　　func main() {
　　// Create an IPC based RPC connection to a remote node and an authorized transactor
　　conn, err := ethclient.Dial("\\\\.\\pipe\\geth.ipc")
　　if err != nil {
　　log.Fatalf("Failed to connect to the Ethereum client: %v", err)
　　}
　　auth, err := bind.NewTransactor(strings.NewReader(key), "123")
　　if err != nil {
　　log.Fatalf("Failed to create authorized transactor: %v", err)
　　}
　　// Deploy a new awesome contract for the binding demo
　　address, tx, token, err := mytoken.DeployMyToken(auth, conn, big.NewInt(9651), "Contracts in Go!!!", 0, "Go!")
　　if err != nil {
　　log.Fatalf("Failed to deploy new token contract: %v", err)
　　}
　　fmt.Printf("Contract pending deploy: 0x%x\n", address)
　　fmt.Printf("Transaction waiting to be mined: 0x%x\n\n", tx.Hash())
　　startTime := time.Now()
　　fmt.Printf("TX start @:%s", time.Now())
　　ctx := context.Background()
　　addressAfterMined, err := bind.WaitDeployed(ctx, conn, tx)
　　if err != nil {
　　log.Fatalf("failed to deploy contact when mining :%v", err)
　　}
　　fmt.Printf("tx mining take time:%s\n", time.Now().Sub(startTime))
　　if bytes.Compare(address.Bytes(), addressAfterMined.Bytes()) != 0 {
　　log.Fatalf("mined address :%s,before mined address:%s", addressAfterMined, address)
　　}
　　name, err := token.Name(&bind.CallOpts{Pending: true})
　　if err != nil {
　　log.Fatalf("Failed to retrieve pending name: %v", err)
　　}
　　fmt.Println("Pending name:", name)
　　}