banani/work.js

JS/TS library for the Banano cryptocurrency in the style of bananopie

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SlowJavascriptWorkProvider = exports.RPCWorkProvider = void 0;
const blake2b_1 = __importDefault(require("blake2b"));
const util_1 = require("./util");
const BANANO_WORK_THRESHOLD = "0xFFFFFE0000000000";
/** Request work from an RPC provider that supports the `work_generate` RPC call */
class RPCWorkProvider {
    constructor(rpc) {
        /** Extra json to send with the rpc payload. Needed for rpc.nano.to's work_generate, unfortunately */
        this.extra_payload = {};
        this.rpc = rpc;
    }
    async request_work(block_hash) {
        return (await this.rpc.call({
            action: "work_generate",
            hash: block_hash,
            ...this.extra_payload,
        })).work;
    }
}
exports.RPCWorkProvider = RPCWorkProvider;
/** Use Javascript to slowly generate work for blocks */
class SlowJavascriptWorkProvider {
    async request_work(block_hash) {
        let nonce = 0;
        while (true) {
            const nonce_bytes = (0, util_1.int_to_uint8array)(nonce, 8).reverse();
            const work = (0, util_1.uint8array_to_hex)((0, blake2b_1.default)(8, undefined, undefined, undefined, true).update(nonce_bytes).update((0, util_1.hex_to_uint8array)(block_hash)).digest().reverse()); //noAssert = true so we can have byte of 8 (min for this library is 16 for some reason)
            if (BigInt(`0x${work}`) > BigInt(BANANO_WORK_THRESHOLD)) {
                return (0, util_1.uint8array_to_hex)(nonce_bytes.reverse());
            }
            nonce += 1;
        }
    }
}
exports.SlowJavascriptWorkProvider = SlowJavascriptWorkProvider;