Bitcoin-Native Payment Channels: Core Implementation - #1
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…nd signature - Implement `is-valid-channel-id` to validate the length of the channel ID. - Implement `is-valid-deposit` to ensure the deposit amount is greater than zero. - Implement `is-valid-signature` to check the length of the signature. These functions enhance the robustness of the payment channel network by ensuring valid inputs.
- Define `payment-channels` map to store channel details. - Add utility function `uint-to-buff` for uint to buffer conversion. - Implement `create-channel` function to create a new payment channel. - Validate channel ID, initial deposit, and participant identities. - Ensure the channel does not already exist. - Transfer initial deposit to the contract and store channel details. This enhances the contract by enabling the creation of new payment channels.
- Add `fund-channel` function to allow participants to add funds to an existing channel. - Validate channel ID, additional funds, and participant identities. - Ensure the channel is open and exists. - Transfer additional funds to the contract and update channel details. This enhances the contract by enabling participants to fund existing payment channels.
- Add `verify-signature` function to validate signatures. - Implement `close-channel-cooperative` function to close a channel cooperatively. - Validate channel ID, signatures, and participant identities. - Ensure the channel is open and exists. - Verify signatures from both participants. - Transfer balances to respective participants and update channel status. This enhances the contract by enabling cooperative closure of payment channels.
- Add `initiate-unilateral-close` function to allow a participant to close a channel unilaterally. - Validate channel ID, proposed balances, and signature. - Ensure the channel is open and exists. - Verify the signature from the initiating participant. - Check that the proposed balances match the total channel funds. - Update the channel with the proposed balances and set a dispute deadline. This enhances the contract by enabling unilateral closure of payment channels.
- Add `resolve-unilateral-close` function to resolve a unilateral channel closure. - Validate channel ID and participant identities. - Ensure the dispute period has passed. - Transfer balances to respective participants and update channel status. - Add `get-channel-info` read-only function to retrieve channel information. - Implement `emergency-withdraw` function for contract owner to withdraw funds in emergencies. This enhances the contract by enabling resolution of unilateral closures and providing utility functions.
… reference - Provide an overview of the Bitcoin-Native Payment Channels (BPC) contract. - Detail the features and architecture of the BPC. - Include API reference for constants, data validation functions, and channel storage. This documentation enhances understanding and usage of the BPC contract.
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Overview
This PR implements a comprehensive Layer 2 scaling solution for Stacks blockchain that enables instant, low-cost payments through secure off-chain channels while leveraging Bitcoin's security model.
Key Features
Channel Management
Security & Validation
Implementation Details
Data Validation Layer
is-valid-channel-id: Ensures channel IDs meet length requirementsis-valid-deposit: Validates deposit amounts are positiveis-valid-signature: Verifies signature format complianceCore Channel Functions
Storage & State Management
Documentation
Security Considerations
Documentation Updates
Performance Impact
Next Steps
Checklist