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Go-Ethereum is the official Ethereum implementation in Go, to interact with the blockchain. Go-Ethereum, also known as geth for short, is the most popular Ethereum client. It provides everything we’ll ever need for reading and writing to the blockchain when developing applications using Golang.
client.go
package main

import (
    "fmt"
    "log"
    "github.com/ethereum/go-ethereum/ethclient"
)

func main() {
    client, err := ethclient.Dial("https://mainnet.gateway.tenderly.co/<TENDERLY_NODE_ACCESS_KEY_MAINNET>")
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("we have a connection")
    _ = client // we'll use this in the upcoming sections
}