Uniswap Smart Order Router

This repository contains routing logic for the Uniswap V3 protocol.

It searches for the most efficient way to swap token A for token B, considering splitting swaps across multiple routes and gas costs.

Testing

Unit Tests

First make sure you have run npm install and npm run build.

npm run test

Integration Tests

Make sure the .env file is configured to connect to mainnet and other chains. See the CLI section below for more details.

npm run integ-test

CLI

The package can be run as a CLI for testing purposes.

First create a .env file in the root of the project and configure:

JSON_RPC_PROVIDER = '<JSON_RPC_PROVIDER>'

To run on chains other than mainnet set up a connection by specifying the environment variable

JSON_RPC_PROVIDER_{CHAIN} = '<JSON_RPC_PROVIDER>'

For example, specifying a provider for Optimism :

JSON_RPC_PROVIDER_OPTIMISM = '<JSON_RPC_PROVIDER>'

Then from the root directory you can execute the CLI.

Examples

Some examples to use for manual CLI testing.

Mainnet

./bin/cli quote --tokenIn 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48 --tokenOut 0x1f9840a85d5af5bf1d1762f925bdaddc4201f984 --amount 1000 --exactIn --recipient 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B --protocols v2,v3

Best Route:
100.00% = USDC -- 0.3% --> UNI
	Raw Quote Out:
		35.72
	Gas Adjusted Quote Out:
		34.03

Gas Used Quote Token: 1.691772
Gas Used USD: 47.592951
Calldata: 0x414bf389000000000000...
Value: 0x00

  blockNumber: "13088815"
  estimatedGasUsed: "113000"
  gasPriceWei: "130000000000"


./bin/cli quote-to-ratio --token0 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48 --token1 0xdac17f958d2ee523a2206206994597c13d831ec7 --feeAmount 3000 --recipient 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B  --token0Balance 1000 --token1Balance 2000 --tickLower -120 --tickUpper 120

Best Route:
100.00% = USDT -- 0.05% --> USDC
Raw Quote Exact In:
	392.68
Gas Adjusted Quote In}:
	346.13

Gas Used Quote Token: 46.550010
Gas Used USD: 46.342899
Calldata: 0x414bf389000000000000000000000000dac17f958d2ee523a2206206994597c13d831ec7000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb4800000000000000000000000000000000000000000000000000000000000001f4000000000000000000000000ab5801a7d398351b8be11c439e05c5b3259aec9b000000000000000000000000000000000000000000000000000000000000006400000000000000000000000000000000000000000000000000000000176a736c000000000000000000000000000000000000000000000000000000001764f8650000000000000000000000000000000000000000000000000000000000000000
	Value: 0x00

	blockNumber: "13239188"
	estimatedGasUsed: "113000"
	gasPriceWei: "116690684398"

Rinkeby

./bin/cli quote --tokenIn 0x5592ec0cfb4dbc12d3ab100b257153436a1f0fea --tokenOut 0x4DBCdF9B62e891a7cec5A2568C3F4FAF9E8Abe2b --amount 200000 --exactIn --minSplits 1 --router alpha --chainId 4

Kovan

./bin/cli quote --tokenIn 0x4f96fe3b7a6cf9725f59d353f723c1bdb64ca6aa --tokenOut 0xd0a1e359811322d97991e03f863a0c30c2cf029c --amount 10 --exactIn --minSplits 1 --router alpha --chainId 42

Ropsten

./bin/cli quote --tokenIn 0x07865c6e87b9f70255377e024ace6630c1eaa37f --tokenOut 0xc778417e063141139fce010982780140aa0cd5ab --amount 200000 --exactIn --minSplits 1 --router alpha --chainId 3

Optimism

./bin/cli quote --tokenIn 0x7F5c764cBc14f9669B88837ca1490cCa17c31607 --tokenOut 0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1 --amount 200000 --exactIn --minSplits 1 --router alpha --chainId 10

Optimistic-Kovan

./bin/cli quote --tokenIn 0x7F5c764cBc14f9669B88837ca1490cCa17c31607 --tokenOut 0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1 --amount 200 --exactIn --minSplits 1 --router alpha --chainId 69

Arbitrum

./bin/cli quote --tokenIn 0xfd086bc7cd5c481dcc9c85ebe478a1c0b69fcbb9 --tokenOut 0x82af49447d8a07e3bd95bd0d56f35241523fbab1 --amount 20000 --exactIn --minSplits 1 --router alpha --chainId 42161 --debug

Arbitrum-Rinkeby

./bin/cli quote --tokenIn 0x09b98f8b2395d076514037ff7d39a091a536206c --tokenOut 0xb47e6a5f8b33b3f17603c83a0535a9dcd7e32681 --amount 200 --exactIn --minSplits 1 --router alpha --chainId 421611

Polygon Mumbai

./bin/cli quote --tokenIn 0x001b3b4d0f3714ca98ba10f6042daebf0b1b7b6f --tokenOut 0x9c3c9283d3e44854697cd22d3faa240cfb032889 --amount 1 --exactIn --protocols v3 --recipient 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B --minSplits 1 --router alpha --chainId 80001

Polygon Mainnet

./bin/cli quote --tokenIn 0x2791bca1f2de4661ed88a30c99a7a9449aa84174 --tokenOut 0x7ceb23fd6bc0add59e62ac25578270cff1b9f619 --amount 5 --exactIn --minSplits 1 --protocols v3 --router alpha --chainId 137

Adding a new Chain

The main components to complete are:

• Deploy contracts on chain, add the pools to subgraph
• Populate v3 providers in src/providers/v3/subgraph-provider and src/providers/v3/static-subgraph-provider
• Populate chainId and addresses in src/util/chains.ts and src/util/addresses.ts
• Populate token providers in src/providers/caching-token-provider and src/providers/token-provider.ts
• Populate gas constants in src/routers/alpha-router/gas-models/*
• Populate bases in src/routers/legacy-router/bases.ts
• Populate test/integ/routers/alpha-router/alpha-router.integration.test.ts and src/providers/v2/static-subgraph-provider.ts
• Populate src/routers/alpha-router/*
• Add a log to /CHANGELOG.md
• Run npm run integ-test successfully