construct_eip_3009_authorization_message

Documentation for eth_defi.usdc.eip_3009.construct_eip_3009_authorization_message function.

construct_eip_3009_authorization_message(chain_id, token, from_, to, value, valid_before=0, valid_after=1, duration_seconds=0, authorization_type=EIP3009AuthorizationType.TransferWithAuthorization)[source]

Create EIP-712 message for EIP-3009 transfers.

Used to construct the message that then needs to be signed
The signature will be verified by receiveWithAuthorization() or transferWithAuthorization function in the token contract

Note

For Polygon USDC transferWithAuthorization() you need to use a different message structure, because Polygon bridged tokens are not EIP-3009 compatible. This function cannot work with Polygon bridged tokens.

Polygon version is:

EIP712Domain: [
  { name: 'name', type: 'string' },
  { name: 'version', type: 'string' },
  { name: 'verifyingContract', type: 'address' },
  { name: 'salt', type: 'bytes32' }
]