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Oracles & Data

Euler Price Oracles

Euler Price Oracles is an open-source Solidity library of modular oracle adapters and components implementing the amount-based IPriceOracle interface, which is compatible with ERC-7726.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Euler Price Oracles — OpenViST project profile in Oracles & Data.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when building Solidity applications that need on-chain asset quotes through a shared interface, including lending markets, vaults and Euler Vault Kit integrations.

Who it is for

  • Solidity developers integrating oracle-based asset valuation into DeFi applications.
  • Builders of lending markets and vaults that need quotes between assets.
  • Developers integrating price oracles with the Euler Vault Kit.

Documented uses

  • Request the quote amount of one asset corresponding to a specified amount of another.
  • Use oracle adapters for provider feeds, on-chain rates or time-weighted average prices.
  • Retrieve separate bid and ask quote amounts where an integration needs sell and buy values.
  • Install, compile and test the library in a Foundry development workflow.
Before you choose

Requirements & limits

The repository is public and specifies the GPL-2.0 license.

  • Adapter choice depends on the pricing source and its parameters, such as feed, maximum staleness, confidence interval or TWAP window.
  • The interface handles decimal conversion within adapters, allowing consumers to remain agnostic to provider-specific implementation details.
  • Adapters are described as immutable and narrowly responsible for querying one pricing system and feed.
  • Fork tests require an Ethereum RPC URL; the Redstone fork tests additionally require Foundry FFI to be enabled.

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

Install and compile Euler Price Oracles with Foundry

Add the repository to a Foundry project, or prepare a local checkout and compile its contracts.

Before you start

  • A Foundry project and Foundry tooling for the install workflow.
  • For the documented local workflow, Git and Foundry; Node.js dependencies are optional.

Steps

  1. In a Foundry project, run forge install euler-xyz/euler-price-oracle.

  2. For local development instead, clone https://github.com/euler-xyz/euler-price-oracle.git and enter the repository directory.

  3. In the local checkout, run forge install to install Forge dependencies.

  4. Optionally run the command below for Node.js dependencies, then run forge build to compile the contracts.

    Documented command
    npm install

Expected outcome

The repository is installed in a Foundry project, or the local contracts are compiled with Foundry.

Guide limitations

  • The documented installation and compilation steps do not configure a particular adapter or establish an application integration.
  • Fork-test prerequisites are separate from this compile workflow.
Documentation 1 ↗
Source-based practical guide

Prepare the repository's fork tests

Configure the documented environment needed to run fork tests, or exclude fork tests from a test run.

Before you start

  • Foundry tooling and the repository's dependencies.
  • An Ethereum RPC URL to run fork tests.

Steps

  1. Set ETHEREUM_RPC_URL in the environment or in a .env file.

  2. Run the repository's Foundry tests to include fork tests, or use forge test --no-match-contract Fork to exclude them.

  3. For the Redstone fork tests, set ffi = true in foundry.toml before running them.

Expected outcome

The environment is configured for the repository's fork tests, or the command excludes fork-test contracts.

Guide limitations

  • An Ethereum RPC URL is required for fork tests.
  • Redstone fork tests invoke a script through Foundry's FFI cheatcode; FFI is not enabled by default.
  • These are repository instructions, not a report of tests run.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
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Sources checked
10 October 2026
Original website title
euler-xyz/euler-price-oracle · Official homepage title · retained in its source language
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