Crate cow_ethflow 

cow-ethflow — Layer 2 EthFlow contract helpers for the CoW Protocol SDK.

Encode createOrder calldata for native-currency orders.

When a user wants to sell ETH (or another chain’s native currency) instead of an ERC-20, the order is submitted through the EthFlow contract rather than the standard GPv2Settlement flow. This module provides the types and encoding functions for that path.

Key items

Item	Purpose
EthFlowOrderData	Parameters for a native-currency sell order
EthFlowTransaction	Ready-to-send transaction (to, data, value)
encode_eth_flow_create_order	ABI-encode createOrder(...) calldata
build_eth_flow_transaction	Build the complete transaction
is_eth_flow_order_data	Check if on-chain data indicates an EthFlow order

Structs

EthFlowOrderData

Parameters for a native-currency sell order submitted through the EthFlow contract.

EthFlowTransaction

Ready-to-send transaction for submitting a native-currency order.

Functions

build_eth_flow_transaction

Build a complete EthFlowTransaction for contract_address.

encode_eth_flow_create_order

Encode the EthFlow.createOrder(order, quoteId) calldata.

is_eth_flow_order_data

Check whether on-chain data is present, indicating an EthFlow order.