Ethers.js CCIP-Read Fallback bug

[0xc0de4c0ffee]

CCIP gateways supposed to fallback if top one fails to resolve..
Some dapps may use multiple gateways to read and validate data.

ethers.js v5 bug
ethers-io/ethers.js#3148

I'll check for v6 & report back.

Resolver code :

string[] memory _gateways = new string[](3);
// TODO : make gateway lists to updatable array ?randomize weight.
_gateways[0] = string.concat(_domain, ".limo/.well-known/", _jsonPath, ".json?t={data}");
_gateways[1] = string.concat(_domain, ".casa/.well-known/", _jsonPath, ".json?t={data}");
_gateways[2] = string.concat(_domain, ".link/.well-known/", _jsonPath, ".json?t={data}");
revert OffchainLookup(
    THIS, // callback contract
    _gateways, // gateway URL array
    abi.encodePacked(uint32(block.timestamp / 60) * 60), // {data} = 0xtimestamp, nocache after 60 seconds
    CCIP2.__callback.selector, // callback function
    abi.encode( // extradata
        block.number, // checkpoint
        keccak256(data), // namehash + calldata
        keccak256(
            abi.encodePacked(
                blockhash(block.number - 1),
                THIS,
                msg.sender,
                keccak256(data)
            )
        )
    )
);

[sshmatrix]

I'll add this to our dework pipeline