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# @version 0.3.7
"""
@title StableSwap
@author Curve.Fi
@license Copyright (c) Curve.Fi, 2020-2023 - all rights reserved
@notice 2 coin pool implementation with no lending
@dev ERC20 support for return True/revert, return True/False, return None
"""
from vyper.interfaces import ERC20
interface Factory:
    def get_fee_receiver(_pool: address) -> address: view
    def admin() -> address: view
interface ERC1271:
    def isValidSignature(_hash: bytes32, _signature: Bytes[65]) -> bytes32: view
event Transfer:
    sender: indexed(address)
    receiver: indexed(address)
    value: uint256
event Approval:
    owner: indexed(address)
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