📌BiDirectionalPaymentChannel

Overview

The BiDirectionalPaymentChannel contract is designed to manage a two-way payment channel between two parties.

This type of channel allows these parties to conduct numerous transactions with each other off-chain, with the final settlement occurring on the Ethereum blockchain.

The primary advantage of this approach is the significant reduction in transaction fees and improved efficiency, as only two transactions (channel opening and closing) are recorded on the blockchain, regardless of the number of off-chain transactions conducted.

Methods

verify

Checks whether the provided signatures are valid for the given contract state (balances and nonce).

Parameters

Name	Type	Description
_signatures	bytes[2] memory	Array of cryptographic signatures from the users.
_contract	address	Address of this contract.
_signers	address[2] memory	Array of addresses of the signers.
_balances	uint[2] memory	Proposed balances of the users in the channel.
_nonce	uint	Nonce associated with the current state.

Returns

Name	Type	Description
-	bool	Returns true if the signatures are valid for the given state, otherwise false.

challengeExit

Allows a user to propose a new state (balances and nonce) for the channel, secured by their signatures.

Parameters

Name	Type	Description
_balances	uint[2] memory	Proposed balances of the users in the challenge.
_nonce	uint	Nonce associated with the challenge state.
_signatures	bytes[2] memory	Array of cryptographic signatures from the users for the challenge.

withdraw

Enables a user to withdraw their balance from the contract after the challenge period has expired.