Basic WC Recover Signature

[bh2smith]

Just trying to handle signature reconstruction for session request types.

How to use this:

  const handleRequest = async (request: Web3WalletTypes.SessionRequest) => {
    if (!web3wallet) {
      console.error("No Web3Wallet connected");
      return;
    }
    if (!adapter) {
      console.error("No Adapter set");
      return;
    }
    console.log("Received SessionRequest", JSON.stringify(request));
    const {evmMessage, nearPayload, recoveryData} = await adapter.handleSessionRequest(request);
    console.log("signing request for\n", evmMessage);
    const signArgs = nearPayload.actions[0].params.args as SignArgs;
    const nearSig = await adapter.mpcContract.requestSignature(signArgs);
    const result = await adapter.recoverSignature(recoveryData, nearSig);
    web3wallet.respondSessionRequest({
      topic: request.topic,
      response: {
        id: request.id,
        jsonrpc: "2.0",
        result
      }
    });
  };