Compound Migration Bot Vyper contract

This smart contract system is to let users move Compound asset tokens just like cUSDC and cETH between Ethereum and Base/Arbitrum chain. This uses Native USDC bridge to move assets.

Test and dependencies

Install Foundry, Apeworx.

ape plugins install foundry infura vyper

ape test --network ethereum:mainnet:foundry

Read-Only functions

compass

Key	Type	Description
Return	address	Returns compass-evm smart contract address

refund_wallet

Key	Type	Description
Return	address	Returns refund wallet address

gas_fee

Key	Type	Description
Return	uint256	Returns gas fee amount to pay to use paloma message

service_fee_collector

Key	Type	Description
Return	address	Returns service fee collector address

service_fee

Key	Type	Description
Return	uint256	Returns service fee ratio. 100% equals 10 ** 18

paloma

Key	Type	Description
Return	bytes32	Public key of Paloma message sender

last_nonce

Key	Type	Description
Return	uint256	nonce number of sending transactions

State-Changing functions

send_to_bridge_usdc

Send USDC token to USDC native bridge to migrate cUSDC

Key	Type	Description
amount	uint256	Bridging token amount. If this is 0, the contract tries to bridge entire amount the message sender has.
destination_domain	uint32	Destination chain domain number in USDC native bridge
mint_recipient	bytes32	Recipient address. This should be the Migration bot contract on opposite chain
burn_token	address	Burn token address parameter for USDC native bridge

receive_from_bridge_usdc

Receive USDC token to migrate cUSDC using native USDC bridge. Paloma messenger can run this function via Compass-EVM only.

Key	Type	Description
message	bytes	USDC bridge message data
signature	bytes	USDC bridge signature data
receiver	address	Receiver address. It should be same as the token migrator address

send_to_bridge_other

Send USDC token to USDC native bridge to migrate cTokens

Key	Type	Description
ctoken	address	cToken address to migrate
amount	uint256	Bridging token amount. If this is 0, the contract tries to bridge entire amount the message sender has.
dex	address	dex address to exchange asset into USDC
payload	bytes	payload data to exchange asset into USDC
destination_domain	uint32	Destination chain domain number in USDC native bridge
mint_recipient	bytes32	Recipient address. This should be the Migration bot contract on opposite chain
burn_token	address	Burn token address parameter for USDC native bridge

receive_from_bridge_other

Receive USDC token to migrate cUSDC using native USDC bridge. Paloma messenger can run this function via Compass-EVM only.

Key	Type	Description
message	bytes	USDC bridge message data
signature	bytes	USDC bridge signature data
receiver	address	Receiver address. It should be same as the token migrator address
ctoken	address	cToken address to be migrated
dex	address	dex address to exchange USDC into asset
payload	bytes	payload data to exchange USDC into asset