Update Swap Contract to Support BTC > Solana / SUI / TON

[ronaldoguedess]

The current Swap example-contract doesn't support swaps from Bitcoin to: (SOL/SUI/TON)

• Bitcoin > Solana
• Bitcoin > SUI
• Bitcoin > TON

As @fadeev suggested, I already convert the Solana address to hex to add it on the bitcoin memo (as required), but the contract itself doesn't recognize that format. It only handles EVM-compatible destinations when Bitcoin is the source chain.

To move forward with BTC > Solana/SUI/TON cross-chain, the Swap contract needs to support different address formats and decoding logic depending on the target chain.

As I see, the onCall and withdraw must be updated.

I created bytesToBech32Bytes to test, but no success so far…

BytesHelperLib.sol

    function bytesToBech32Bytes(
        bytes calldata data,
        uint256 offset
    ) internal pure returns (bytes memory) {
        bytes memory bech32Bytes = new bytes(42);
        for (uint i = 0; i < 42; i++) {
            bech32Bytes[i] = data[i + offset];
        }

        return bech32Bytes;
    }

Swap.sol

if (context.chainID == BITCOIN_TESTNET || context.chainID == BITCOIN) {
            params.target = BytesHelperLib.bytesToAddress(message, 0);
            //params.to = abi.encodePacked(BytesHelperLib.bytesToAddress(message, 20));  //EVM

            //SOL ADDRESS (TESTING)
            params.to = BytesHelperLib.bytesToBech32Bytes(message, 20); 

            ...

Can you implement this logic on the swap example contract or guidance on how to implement this?