know-js/lib/transactions/attach-info.js

JavaScript library for sending Know transactions from the client or server

/** @module attach info */

var crypto = require("./crypto.js"),
    constants = require("../constants.js"),
    slots = require("../time/slots.js");

/**
 * @static
 * @param {string} kdsphash
 * @param {ECPair|string} secret
 * @param {ECPair|string} [secondSecret]
 * @param {number} [feeOverride]
 */
function createHashRegistration(kdsphash, secret, secondSecret, feeOverride) {
    if (!ipfshash || !secret) return false;

    if (feeOverride && !Number.isInteger(feeOverride)) {
        throw new Error('Not a valid fee')
    }

    var transaction = {
        type: 11,
        amount: 0,
        fee: feeOverride || constants.fees.attachinfo,
        timestamp: slots.getTime(),
        asset: {}
    };

    transaction.vendorFieldHex = new Buffer(kdsphash, "utf8").toString("hex");
    //filling with 0x00
    while (transaction.vendorFieldHex.length < 128) {
        transaction.vendorFieldHex = "00" + transaction.vendorFieldHex;
    }

    var keys = secret;

    if (!crypto.isECPair(secret)) {
        keys = crypto.getKeys(secret);
    }

    if (!keys.publicKey) {
        throw new Error("Invalid public key");
    }

    transaction.senderPublicKey = keys.publicKey;

    crypto.sign(transaction, keys);

    if (secondSecret) {
        var secondKeys = secondSecret;
        if (!crypto.isECPair(secondSecret)) {
            secondKeys = crypto.getKeys(secondSecret);
        }
        crypto.secondSign(transaction, secondKeys);
    }

    transaction.id = crypto.getId(transaction);
    return transaction;
}

module.exports = {
    createHashRegistration: createHashRegistration
}