Smart Contract Development for WrappedBTC on Fantom

I urgently need the source code of a smart contract to find vulnerabilities in the blockchain. I need a smart contract to create Fantom WrappedBTC (WBTC) or Flash USDT tokens. These tokens should fully reflect the balance of the original and correctly interact with the original addresses on the Fantom network, as well as be displayed on the original token's address. The source code is needed for analysis and identifying potential vulnerabilities. Please provide the final cost of developing the smart contract or source code.