A secure transaction relay system to enable users to pay fees using ERC-20 tokens.

RIF Relay takes its inspiration from the Gas Station Network (GSN) project. GSN is a decentralized system that improves dApp usability without sacrificing security. In a nutshell, GSN abstracts away gas (used to pay transaction fees) to minimize onboarding and UX friction for dApps. With GSN, “gasless clients” can interact with smart contracts paying for gas with tokens instead of native-currency.

Our main objective is to provide the RSK ecosystem with the means to enable blockchain applications and end-users (wallet-apps) to pay for transaction fees using tokens (e.g. RIF tokens), and thereby remove the need to acquire RBTC in advance.

It is important to recall that - as a security measure - the version 1 contracts deployed on Mainnet have limits on the staked amounts to operate, these limits were removed in version 2.

RIF Relay is built in modules, the entire system is made up by 3 modules.

1. RIF Relay Contracts contains all the contracts used by the RIF Relay System.
2. RIF Relay Client contains a library to interact with the relay server.
3. RIF Relay Server has all the relay server code. You can run the server directly from there.

Each module has instructions for development and usage.

We've created a sample dApp to showcase how users can submit relayed transactions to the Rootstock blockchain using the RIF Relay Sample dApp SDK. For details, see RIF Relaying Services SDK sample dApp.

This repository contains all the integration tests. These tests verify the behavior of the entire system. You have two ways to run tests:

1. Executing npm test will run all the test suite and verify all the system. This could take a few hours since executing the entire test suite is a heavy task.
2. Running npm run testOnly <TEST_FILE> where <TEST_FILE> it’s the typescript file that contains the test code inside will execute only that test and make the verifications inside it. An example could be npm run testOnly ./test/relayserver/RelayServer.test.ts.

Important Note: when you run the tests you will see folders like contracts, migrations and some other files appearing during the tests and disappearing after, that’s because we need to have the contracts on the same context as this repository during tests, this is a normal behavior.

This repository contains a script that analyzes gas consumption for relay and deploy transactions. It prints different metrics related to gas usage when relaying a transaction or deploying a smart wallet. To run it, execute the command:

npm run analyze:gas <NETWORK_NAME>

where:

• <NETWORK_NAME> is a required parameter for the network name, taken from the hardhat.config.ts, and must correspond to a valid RSK Node (commonly, regtest is used). Do not use this with the default network (hardhat) as it will fail.

Example: npm run analyze:gas regtest

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