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Crypto exchanger example

Crypto exchanger example is an open-source JavaScript implementation guide for an Ethereum and ERC-20 exchange deposit backend. It shows a Node.js monitoring-client flow for creating and watching deposit addresses, distinguishing incoming token transfers from ETH transactions, forwarding assets to a cold address, and notifying an administrator.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Crypto exchanger example — OpenViST project profile in Exchanges & Trading.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it as a coding reference when designing an Ethereum exchange deposit flow, particularly to understand the distinction between token and ETH handling in the monitoring callback.

Who it is for

  • Developers building Ethereum or ERC-20 deposit-monitoring components for an exchange.
  • Engineers examining a sample flow for watching user deposit addresses and forwarding funds.

Documented uses

  • Create an Ethereum address to give a user for deposits.
  • Monitor that address for ETH transactions and ERC-20 transfers.
  • Forward received tokens or ETH to a cold address.
  • Remove an address from monitoring and notify an administrator after funds are received.
Before you choose

Requirements & limits

The repository is public and lists an Apache-2.0 license.

  • The example depends on the eth-bulk-monitor-client-nodejs package and initializes MonitorApp with an API key.
  • Address generation, gas funding, asset transfers, and administrator notification are represented by placeholder functions that a developer must implement.
  • The README does not demonstrate persistent address-to-customer mappings or monitoring-state recovery.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Set up the Node.js monitor client

Install the named monitoring client and initialize the example’s MonitorApp with an API key.

Before you start

  • Node.js/npm project
  • An API key for MonitorApp initialization

Steps

  1. Create a project directory and initialize it with npm.

  2. Install eth-bulk-monitor-client-nodejs.

  3. Import MonitorApp from the package and initialize it with your API key.

Expected outcome

A project with the monitoring client installed and a MonitorApp instance initialized, ready for the separately documented monitoring code.

Guide limitations

  • This setup does not implement address creation, deposit processing, transfers, or a complete exchange.
  • The guide does not provide an API-key acquisition procedure.
Documentation 1 ↗
Source-based practical guide

Register an Ethereum address for monitoring

Create an Ethereum deposit address and add it to the MonitorApp address watch list.

Before you start

  • An initialized MonitorApp with an API key
  • An Ethereum address-creation function; the README notes web3 as one way to create an address

Steps

  1. Create a new Ethereum address.

  2. Pass the address to monitorApp.monitor.addAddresses.

  3. Use the MonitorApp watch callback to receive related transaction data.

Expected outcome

The example’s monitor is set up to report transactions associated with the added address through its callback.

Guide limitations

  • The address-creation function is a placeholder rather than a complete implementation.
  • The guide does not show persistent storage for address ownership or monitoring state.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
16 October 2026
Original website title
amilabs/crypto-exchanger · Official homepage title · retained in its source language
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