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Published: Feb 21, 2020 | License: MIT



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Go bindings to the API, with nearly Full implementation(accounts, transactions, tokens, contracts, blocks, stats), full network support(Mainnet, Ropsten, Kovan, Rinkby, Tobalaba), and only depending on standard library. :wink:


Create a API instance and off you go. :rocket:

import (

func main() {
	// create a API client for specified ethereum net
	// there are many pre-defined network in package
	client := etherscan.New(etherscan.Mainnet, "[your API key]")

	// (optional) add hooks, e.g. for rate limit
	client.BeforeRequest = func(module, action string, param map[string]interface{}) error {
		// ...
	client.AfterRequest = func(module, action string, param map[string]interface{}, outcome interface{}, requestErr error) {
		// ...

	// check account balance
	balance, err := client.AccountBalance("0x281055afc982d96fab65b3a49cac8b878184cb16")
	if err != nil {
	// balance in wei, in *big.Int type

	// check token balance
	tokenBalance, err := client.TokenBalance("contractAddress", "holderAddress")

	// check ERC20 transactions from/to a specified address
	transfers, err := client.ERC20Transfers("contractAddress", "address", startBlock, endBlock, page, offset)

You may find full method list at GoDoc.

Etherscan API Key

You may apply for an API key on etherscan.

The Etherscan Ethereum Developer APIs are provided as a community service and without warranty, so please just use what you need and no more. They support both GET/POST requests and a rate limit of 5 requests/sec (exceed and you will be blocked).

Paperwork Things

I am not from Etherscan and I just find their service really useful, so I implement this. :smile:


Use of this work is governed by a MIT License.

You may find a license copy in project root.