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Use high performance APIs provided by Infura to scale your dapp or Snap.

Use Go

Send a regular transaction from one account to another with Go.

Prerequisites​

info

Use MetaMask or similar to create an Ethereum account for testing.

Steps​

1. Create a project directory​

Create a new directory:

mkdir infura

cd into the directory:

cd infura

2. Initialize the directory and install the dependencies​

go mod init infura
go get github.com/ethereum/go-ethereum/common
go get github.com/ethereum/go-ethereum/core/types
go get github.com/ethereum/go-ethereum/crypto
go get github.com/ethereum/go-ethereum/rpc@v1.10.17

3. Create eip1559_tx.go file​

package main

import (
  "context"
  "crypto/ecdsa"
  "fmt"
  "log"
  "math/big"

  "github.com/ethereum/go-ethereum/common"
  "github.com/ethereum/go-ethereum/core/types"
  "github.com/ethereum/go-ethereum/crypto"
  "github.com/ethereum/go-ethereum/ethclient"
)

func main() {
  client, err := ethclient.Dial("https://sepolia.infura.io/v3/API_KEY")
  if err != nil {
    log.Fatal(err)
  }

  privateKey, err := crypto.HexToECDSA("PRIVATE_KEY")
  if err != nil {
    log.Fatal(err)
  }

  publicKey := privateKey.Public()
  publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
  if !ok {
    log.Fatal("error casting public key to ECDSA")
  }

  fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA)

  nonce, err := client.PendingNonceAt(context.Background(), fromAddress)
  if err != nil {
    log.Fatal(err)
  }

  value := big.NewInt(10000000000000000) // in wei (0.01 eth)
  gasLimit := uint64(21000)              // in units
  tip := big.NewInt(2000000000)          // maxPriorityFeePerGas = 2 Gwei
  feeCap := big.NewInt(20000000000)      // maxFeePerGas = 20 Gwei
  if err != nil {
    log.Fatal(err)
  }

  toAddress := common.HexToAddress("ADDRESS_TO")
  var data []byte

  chainID, err := client.NetworkID(context.Background())
  if err != nil {
    log.Fatal(err)
  }

  tx := types.NewTx(&types.DynamicFeeTx{
    ChainID:   chainID,
    Nonce:     nonce,
    GasFeeCap: feeCap,
    GasTipCap: tip,
    Gas:       gasLimit,
    To:        &toAddress,
    Value:     value,
    Data:      data,
  })

  signedTx, err := types.SignTx(tx, types.LatestSignerForChainID(chainID), privateKey)
  if err != nil {
    log.Fatal(err)
  }

  err = client.SendTransaction(context.Background(), signedTx)
  if err != nil {
    log.Fatal(err)
  }

  fmt.Printf("Transaction hash: %s", signedTx.Hash().Hex())
}

Replace the following values in the script:

If using a different Ethereum network, update the URL in the script.

danger

Never disclose your private key.

A malicious actor who has access to your private key can steal your assets.

4. Execute the transaction​

Run the script:

go run eip1559_tx.go

Example output:

Transaction hash: 0x47ed277bdfee88902f971510a7cd7b4c55722ea06488e697fb05dc99454e51ab

You can search for the transaction on a block explorer like Sepolia Etherscan.

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