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Routing

Overview

This is an example of finding an ideal swapping route that includes running against mainnet, locally, and using a wallet connection.

The core functionality of this example can be found in routing.ts.

Configuration

This application can be configured to interact with:

  1. A locally deployed mainnet fork
  2. The mainnet
  3. An in-browser wallet (mainnet or configured locally)

To configure between these, set the Environment to the correct environment in the example configuration file.

The configuration includes control of the environment as well as inputs to the example's functionality. The rest of the code should need no modification to function.

Setup

Install dependencies

  1. Run yarn install to install the project dependencies
  2. Run yarn install:chain to download and install Foundry

Get a mainnet RPC URL

  1. Create an API key using any of the Ethereum API providers and grab the respective RPC URL, eg https://mainnet.infura.io/v3/0ac57a06f2994538829c14745750d721
  2. Set that as the value of the mainnet rpc value inside the config.

Run your local chain

  1. Run yarn start:chain <provider_API_URL> in a separate terminal session to start up a copy of the mainnet blockchain locally

Select your wallet

This example uses the first sample wallet offered by Foundry (listed in the terminal output upon starting your local chain). If you'd like to use a different wallet, modify the config's wallet address and privateKey. Note these are not used when configured to use a wallet extension.

Setup a wallet browser extension

  1. Install a wallet browser extension
  2. Add a new manual/local network to your wallet local chain using http://localhost:8545 for your RPC URL and 1337 for your chain ID, and ETH for your currency.
  3. Import your selected wallet using your private key (e.g. 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80 from Foundry's example wallets)

Start the web interface

Run yarn start and navigate to http://localhost:3000/