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simulate_blockchain.go
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/
simulate_blockchain.go
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package main
import (
"context"
"encoding/hex"
"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 simulateBlockchain() {
privateKey, err := crypto.GenerateKey()
if err != nil {
log.Fatal(err)
}
chainID := big.NewInt(1337)
auth, err := bind.NewKeyedTransactorWithChainID(privateKey, chainID)
if err != nil {
log.Fatal(err)
}
balance := new(big.Int)
balance.SetString("10000000000000000000", 10) // 10 eth
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
gasFeeCap, err := client.SuggestGasPrice(context.Background())
if err != nil {
log.Fatal(err)
}
gasTipCap, err := client.SuggestGasTipCap(context.Background())
if err != nil {
log.Fatal(err)
}
if err != nil {
log.Fatal(err)
}
toAddress := common.HexToAddress("0x4592d8f8d7b001e72cb26a73e4fa1806a51ac79d")
var data []byte
tx := types.NewTx(&types.DynamicFeeTx{
ChainID: chainID,
Nonce: nonce,
GasFeeCap: gasFeeCap,
GasTipCap: gasTipCap,
Gas: gasLimit,
To: &toAddress,
Value: value,
Data: data,
})
signedTx, err := types.SignTx(tx, types.NewLondonSigner(chainID), privateKey)
if err != nil {
log.Fatal(err)
}
err = client.SendTransaction(context.Background(), signedTx)
if err != nil {
log.Fatal(err)
}
client.Commit() // mine
txHash := common.HexToHash(signedTx.Hash().Hex())
tx, isPending, err := client.TransactionByHash(context.Background(), txHash)
fmt.Println("contract address =", address.Hex())
fmt.Println("transaction hash:", tx.Hash().Hex())
fmt.Println("transaction gas limit:", tx.Gas())
fmt.Println("transaction fee cap per gas:", tx.GasFeeCap())
fmt.Println("transaction tip cap per gas:", tx.GasTipCap())
fmt.Println("transaction data:", hex.EncodeToString(tx.Data()))
fmt.Println("transaction to:", tx.To().Hex())
fmt.Println("isPending:", isPending)
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
}