Created
November 5, 2018 07:37
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Use a simulated backend for testing
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package main | |
import ( | |
"context" | |
"fmt" | |
"log" | |
"math/big" | |
"github.com/ethereum/go-ethereum/accounts/abi/bind" | |
"github.com/ethereum/go-ethereum/accounts/abi/bind/backends" | |
"github.com/ethereum/go-ethereum/common" | |
"github.com/ethereum/go-ethereum/core" | |
"github.com/ethereum/go-ethereum/core/types" | |
"github.com/ethereum/go-ethereum/crypto" | |
) | |
func main() { | |
privateKey, err := crypto.GenerateKey() | |
if err != nil { | |
log.Fatal(err) | |
} | |
auth := bind.NewKeyedTransactor(privateKey) | |
balance := new(big.Int) | |
balance.SetString("10000000000000000000", 10) // 10 eth in wei | |
address := auth.From | |
genesisAlloc := map[common.Address]core.GenesisAccount{ | |
address: { | |
Balance: balance, | |
}, | |
} | |
blockGasLimit := uint64(4712388) | |
client := backends.NewSimulatedBackend(genesisAlloc, blockGasLimit) | |
fromAddress := auth.From | |
nonce, err := client.PendingNonceAt(context.Background(), fromAddress) | |
if err != nil { | |
log.Fatal(err) | |
} | |
value := big.NewInt(1000000000000000000) // in wei (1 eth) | |
gasLimit := uint64(21000) // in units | |
gasPrice, err := client.SuggestGasPrice(context.Background()) | |
if err != nil { | |
log.Fatal(err) | |
} | |
toAddress := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d") | |
var data []byte | |
tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data) | |
chainID := big.NewInt(1) | |
signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), privateKey) | |
if err != nil { | |
log.Fatal(err) | |
} | |
err = client.SendTransaction(context.Background(), signedTx) | |
if err != nil { | |
log.Fatal(err) | |
} | |
fmt.Printf("tx sent: %s\n", signedTx.Hash().Hex()) // tx sent: 0xec3ceb05642c61d33fa6c951b54080d1953ac8227be81e7b5e4e2cfed69eeb51 | |
client.Commit() | |
receipt, err := client.TransactionReceipt(context.Background(), signedTx.Hash()) | |
if err != nil { | |
log.Fatal(err) | |
} | |
if receipt == nil { | |
log.Fatal("receipt is nil. Forgot to commit?") | |
} | |
fmt.Printf("status: %v\n", receipt.Status) // status: 1 | |
} |
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