Bitcoin Tokenizer Smart Contract Implementation #1
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- Implement wrapped Bitcoin token (wBTC) on the Stacks blockchain. - Users can deposit BTC to mint wBTC, withdraw BTC by burning wBTC, and transfer wBTC between accounts. - Include functionality for fee management, operator approval, and emergency shutdown. - Define constants for error handling and deposit limits.
…enizer Contract - Define data variables for contract owner, total supply, initialization status, protocol fee rate, and treasury. - Define fungible token for wrapped Bitcoin (wBTC). - Create data maps for user deposits and approved operators.
… Contract - Define map for approved operators with owner and operator principals. - Implement private functions for contract owner check, fee calculation, initialization check, and amount validation.
- Implement private function to update user deposits in the user-deposits map. - The function updates btc-amount, last-deposit, and total-deposits for the specified user.
…kenizer Contract - Implement `initialize` function to set the treasury address and mark the contract as initialized. - Implement `deposit-btc` function to handle BTC deposits, calculate fees, update user deposits, mint tokens, update total supply, and transfer fees to the treasury.
… Tokenizer Contract - Implement `withdraw-btc` function to handle BTC withdrawals by burning wBTC tokens and updating the total supply. - Implement `transfer` function to transfer wBTC tokens between accounts, ensuring the recipient is valid.
…Tokenizer Contract - Implement `approve-operator` function to allow users to approve operators for their account. - Implement `revoke-operator` function to allow users to revoke operator approval.
- Implement `update-fee-rate` function to allow the contract owner to update the protocol fee rate. - Implement `update-treasury` function to allow the contract owner to update the treasury address. - Implement `transfer-ownership` function to allow the contract owner to transfer ownership to a new owner.
- Implement `get-name` function to return the token name. - Implement `get-symbol` function to return the token symbol. - Implement `get-decimals` function to return the token decimals. - Implement `get-total-supply` function to return the total supply of the token.
- Implement `get-balance` function to return the token balance of an account. - Implement `get-user-deposits` function to return the deposit details of a user. - Implement `is-approved-operator` function to check if an operator is approved for an owner. - Implement `get-fee-rate` function to return the current protocol fee rate.s
- Implement `emergency-shutdown` function to allow the contract owner to disable the contract in case of an emergency.
…ting Guidelines, License, README, and Security Policy
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Overview
This PR implements a comprehensive wrapped Bitcoin (wBTC) smart contract on the Stacks blockchain. The contract enables secure BTC deposits, withdrawals, and transfers while incorporating fee management, operator approvals, and emergency controls.
Key Features
Technical Details
Core Components
Constants and Error Handling
Data Structure
Function Implementation
Security Features
Documentation
Checklist
Additional Notes
The contract has been structured for maintainability with separate modules for different functionalities. All functions include proper error handling and input validation.