Balancer<>Cow Token Swap

This project consists of:

• The OtcEscrow contract from Fei
• Tests that demonstate how the escrow contract will be used on mainnet to execute the swap
• A deployment script

Deployment

npx hardhat deploy --network ethereum
> Enter a gas price (gwei) (12) 14
Estimated cost to deploy OtcEscrowApprovals: 0.005391218 ETH
> Type "DEPLOY" to confirm: DEPLOY
Deploying...
Transaction hash: 0x51a46f5272e1fae65677d1b23a82a16fd31baeee2cd38c5f9a19d671fff9182a

OtcEscrowApprovals deployed to 0x2BC7660181767cd562149ACBA9B89C07E31d7864

npx hardhat verify --network ethereum --constructor-args tasks/arguments.js 0x2BC7660181767cd562149ACBA9B89C07E31d7864
Successfully submitted source code for contract
contracts/OtcEscrowApprovals.sol:OtcEscrowApprovals at 0x2BC7660181767cd562149ACBA9B89C07E31d7864
for verification on the block explorer. Waiting for verification result...

Successfully verified contract OtcEscrowApprovals on the block explorer.
https://etherscan.io/address/0x2BC7660181767cd562149ACBA9B89C07E31d7864#code

Quick start

Run the following commands:

yarn && yarn build && yarn test

Deployment

You'll need to know the exact amount of tokens each party should receive; also note that each party's address must be the recipient of the funds, as well as the one to execute any interactions with the escrow contract.

Deploy script inputs:

• balancer: the address of Balancer's DAO treasury/executor contract
• cow: the address of Cow's DAO treasury/executor contract
• balToken: the address of the BAL token contract
• cowToken: the address of the COW token contract
• balAmount: the amount of BAL token sent in this swap
• cowAmount: the amount of COW token sent in this swap

To deploy to mainnet:

npx hardhat deploy --network ethereum

To deploy to a testnet:

npx hardhat deploy --network sepolia

Etherscan verification

To try out Etherscan verification, you first need to deploy a contract to an Ethereum network that's supported by Etherscan, such as Sepolia.

In this project, copy the .env.example file to a file named .env, and then edit it to fill in the details. Enter your Etherscan API key, your INFURA project ID, and the private key of the account which will send the deployment transaction. With a valid .env file in place, first deploy your contract:

npx hardhat deploy --network sepolia

Then, copy the deployment address and paste it in to replace DEPLOYED_CONTRACT_ADDRESS in this command, after setting the constructor arguments in tasks/arguments.js:

npx hardhat verify --network sepolia --constructor-args tasks/arguments.js DEPLOYED_CONTRACT_ADDRESS

Performance optimizations

For faster runs of your tests and scripts, consider skipping ts-node's type checking by setting the environment variable TS_NODE_TRANSPILE_ONLY to 1 in hardhat's environment. For more details see the documentation.