Socket (move seal and propose in socket)

[arthcp]

• Add seal function to socket.

  • Can be called by anyone
  • Take signature, siblingChainSlug as input (maybe accum address too?)
  • Get latest unsealed root from accum.

  • Check on TransmitManager if signer is allowed.

    function seal(
    uint256 siblingChainSlug,
    address accum, // ??
    bytes signature,
    ) external {
    bytes32 root = accum__.sealPacket();
    
    require(
        transmitManager.checkTransmitter(chainSlug, siblingChainSlug, root, signature),
        "invalid sealer"
    );
    }

• Add propose function to socket.
  • Can be called by anyone.
  • Take root, signature, siblingChainSlug as input (maybe accum address too?)
  • Check on TransmitManager if signer is allowed.
  • Store root.

    function propose(
    uint256 siblingChainSlug,
    address accum, // ??
    bytes32 root,
    bytes signature,
    ) external {
    require(
        transmitManager.checkTransmitter(chainSlug, siblingChainSlug, root, signature),
        "invalid proposer"
    );
    roots[root] = true;
    }

[arthcp]

We also need to store timestamp on propose so that it can be used by optimistic switchboards.

[arthcp]

implemented