@trufnetwork/evm-contracts

Solidity helpers and supporting TypeScript utilities for verifying TrufNetwork attestations. The package is published on npm as @trufnetwork/evm-contracts.

Installation

pnpm add @trufnetwork/evm-contracts

or with npm:

npm install @trufnetwork/evm-contracts

Solidity Usage

import {TrufAttestation} from "@trufnetwork/evm-contracts/contracts/attestation/TrufAttestation.sol";

contract Consumer {
    using TrufAttestation for bytes;

    function verify(bytes calldata payload, address validator) external view returns (bool) {
        TrufAttestation.Attestation memory att = payload.parse();
        return att.verify(validator);
    }
}

For a more complete example (including leader management), see the reference contract linked in the Attestation Library guide.

TypeScript Helpers

The package also exports helpers for building canonical payloads in tests or off-chain tooling:

import { buildCanonicalAttestation, buildSignedAttestation } from "@trufnetwork/evm-contracts";

const canonical = buildCanonicalAttestation(fields);
const payload = buildSignedAttestation(fields, signatureBytes);

Refer to docs/AttestationLibrary.md for details on the field layout and helper APIs.

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Chainlink Functions Toolkit

The repository still contains development tooling for Chainlink Functions and legacy oracle flows. The sections below cover the existing setup.

Requirements

• Node.js
• Deno

See chainlink-functions-toolkit prerequisites for minimum versions.

Setup

Install dependencies

pnpm install

Usage

Run the Deno script directly

To test the Deno script directly, run

pnpm run run:direct

Note

You may encounter a timeout error. If so, you can uncomment the timeout option inside the simpleExample.ts file. Note that it's not possible to do this on a live environment.

Hardhat

Tasks

To see available hardhat tasks and their arguments, run

pnpm hardhat

This will include a list of tasks to interact with our contracts. For a comprehensive overview of available tasks and their functionalities, refer to the Tasks Overview section in the Developer Guide.

Deployment

We use Hardhat Ignition to deploy our contracts to the network.

For detailed deployment instructions, refer to:

• TNOracle Deployment
• TNClientExample Deployment

Demonstration

We have an example of a TNClientExample contract that requests data from a hardcoded stream. See contracts/example/README.md for more information.

TNOracle

The TNOracle contract is deployed by the team and is used to request data using the request function. You may call it from your own contract, or directly from your EOA.

For detailed information about TNOracle, including:

• Lifecycle (deployment, configuration, upgradability)
• Roles and permissions
• Data handling
• External contract usage
• Remote code integration

See TNOracle Documentation.

For developers integrating with TNOracle:

• Developing a TNConsumer
• Best practices (testing, security, gas optimization, error handling)
• Support

Refer to the Developer Guide.

Attestation Library

Smart contracts that ingest signed attestations can import contracts/attestation/TrufAttestation.sol to parse payloads, recover signer addresses, and decode datapoints. Start with the Attestation Library guide for payload format, usage snippets, and TypeScript helpers that mirror the canonical encoder maintained in github.com/trufnetwork/node (extensions/tn_attestation/canonical.go).