Add parsed SLP metadata

This can be tested by running/connecting to the bchd fork located here: https://github.com/simpleledgerinc/bchd/tree/slp

Currently only SLP op_return is being included in any grpc response including pb.Transaction object. Here is some example code inspecting the response:

const grpc_bchrpc = require("grpc-bchrpc-node");
const sp = require("synchronized-promise");

const client = new grpc_bchrpc.GrpcClient();

const txStream = sp(async () => {
    return await client.subscribeTransactions({
        includeBlockAcceptance: false,
        includeMempoolAcceptance: true,
        includeSerializedTxn: false,
        includeOnlySlp: true,
        // slpTokenIds: [ "d6876f0fce603be43f15d34348bb1de1a8d688e1152596543da033a060cff798" ],
    });
})();

txStream.on("data", async (data: TransactionNotification) => {
    const txn = data.getUnconfirmedTransaction().getTransaction();

    const slpVersionTypeToString = (value: number) => {
        for (const k in SlpVersionType) {
            if (SlpVersionType[k] === value) {
                return k;
            }
        }
        return null;
    };

    const slpOpreturnMetadataCaseToString = (value: number) => {
        for (const k in SlpTransactionInfo.SlpOpreturnMetadataCase) {
            if (SlpTransactionInfo.SlpOpreturnMetadataCase[k] === value) {
                return k;
            }
        }
        return null;
    };

    const slpType = slpVersionTypeToString(txn.getSlpTransactionInfo()!.getVersionType());
    console.log(`SLP Type: ${slpType}`);
    console.log(`Parse Error: ${txn.getSlpTransactionInfo()!.getParseError()}`);
    console.log(`Token ID: ${Buffer.from(txn.getSlpTransactionInfo()!.getTokenId_asU8()).toString("hex")}`);
    console.log(`CASE: ${slpOpreturnMetadataCaseToString(txn.getSlpTransactionInfo()!.getSlpOpreturnMetadataCase())}`);
    if (slpType === "SLP_V1_SEND") {
        console.log(`Send amounts: ${txn.getSlpTransactionInfo()!.getV1SendMessage()!.getAmountsList()}`);
    } else if (slpType === "SLP_V1_MINT") {
        console.log(`Mint amount: ${txn.getSlpTransactionInfo()!.getV1MintMessage()!.getMintAmount()}`);
        console.log(`Mint baton vout: ${txn.getSlpTransactionInfo()!.getV1MintMessage()!.getMintBatonVout()}`);
    } else if (slpType === "SLP_V1_GENESIS") {
        console.log(`Name: ${txn.getSlpTransactionInfo()!.getV1GenesisMessage()!.getName()}`);
        console.log(`Ticker: ${txn.getSlpTransactionInfo()!.getV1GenesisMessage()!.getTicker()}`);
        console.log(`Divisibility: ${txn.getSlpTransactionInfo()!.getV1GenesisMessage()!.getDecimals()}`);
        console.log(`Mint amount: ${txn.getSlpTransactionInfo()!.getV1GenesisMessage()!.getMintAmount()}`);
        console.log(`Mint baton: ${txn.getSlpTransactionInfo()!.getV1GenesisMessage()!.getMintBatonVout()}`);
    }
});

simpleledgerinc / grpc-bchrpc-node

Add parsed SLP metadata #6