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EXW3

EXW3 is an open-source Elixir library that wraps Ethereumex with a higher-level Ethereum JSON-RPC client and smart-contract utilities.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

EXW3 — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use EXW3 when an Elixir application needs a higher-level interface for common Ethereum JSON-RPC and smart-contract tasks and can connect to an Ethereum node over HTTP or IPC.

Who it is for

  • Elixir developers building backend applications that need to communicate with an Ethereum node.
  • Teams integrating contract calls, transactions, or event-log retrieval into Elixir software.

Documented uses

  • Query account information, balances, and block numbers from an Ethereum node.
  • Load an ABI, register a contract, and call its methods or send a transaction.
  • Create event filters, retrieve filter changes, and remove filters.
Before you choose

Requirements & limits

The repository identifies EXW3 as open source under the Apache-2.0 license.

  • Requires access to an Ethereum node and its HTTP endpoint or IPC socket.
  • The library exposes a handful of frequently used JSON-RPC commands; Ethereumex is the documented route for other commands.
  • The README notes that address values used as contract ABI inputs may need conversion to integers.

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

Configure an Ethereum RPC connection

Add the documented HTTP or IPC connection settings for an Ethereum node to an Elixir project using EXW3.

Before you start

  • An Elixir project using Mix
  • An Ethereum node and its HTTP endpoint or IPC socket

Steps

  1. Add {:exw3, "~> 0.6"} to the dependencies in mix.exs.

  2. For HTTP, configure Ethereumex with client_type: :http and the node URL.

  3. For IPC, configure client_type: :ipc and the node's IPC socket path; provide the path as described in the README.

Expected outcome

The project has the documented EXW3 dependency and an Ethereumex connection configuration for an Ethereum node.

Guide limitations

  • This guide covers dependency and connection configuration only; it does not demonstrate an end-to-end execution check.
  • EXW3 supports a limited set of common JSON-RPC commands; the README points to Ethereumex for commands it does not provide.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
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Sources checked
14 October 2026
Original website title
hswick/exw3 · Official homepage title · retained in its source language
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