This repository contains routing API for the Uniswap V3 protocol.

It deploys an API to AWS that uses @uniswap/smart-order-router to search for the most efficient way to swap token A for token B.

The develop on the Routing API you must have an AWS account where you can deploy your API for testing.

The best way to develop and test the API is to deploy your own instance to AWS.

1. Install and configure AWS CLI and AWS CDK V1.
2. Create .env file in the root directory of the project with :

   THROTTLE_PER_FIVE_MINS = '' # Optional
   WEB_RPC_{CHAIN ID} = { RPC Provider}
   # RPC Providers must be set for the following CHAIN IDs:
   # MAINNET = 1
   # ROPSTEN = 3
   # RINKEBY = 4
   # GÖRLI = 5
   # KOVAN = 42
   # OPTIMISM = 10
   # OPTIMISTIC_KOVAN = 69
   # ARBITRUM_ONE = 42161
   # ARBITRUM_RINKEBY = 421611
   # POLYGON = 137
   # POLYGON_MUMBAI = 80001
   

3. Install and build the package

   npm install && npm run build
   

4. To deploy the API run:

   cdk deploy RoutingAPIStack
   

   This will deploy to the default account your AWS CLI is configured for. Once complete it will output something like:

   RoutingAPIStack.Url = https://...
   

   You can then try it out:

   curl --request GET '<INSERT_YOUR_URL_HERE>/quote?tokenInAddress=0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2&tokenInChainId=1&tokenOutAddress=0x1f9840a85d5af5bf1d1762f925bdaddc4201f984&tokenOutChainId=1&amount=100&type=exactIn'
   

The integration tests fetch quotes from your deployed API, then execute the swaps on a Hardhat mainnet fork.

1. First deploy your test API using the intructions above. Then update your .env file with the URL of the API, and the RPC URL of an archive node:

   UNISWAP_ROUTING_API='...'
   ARCHIVE_NODE_RPC='...'
   

2. Run the tests with:

   npm run integ-test