lotus-sdk/dist/lib/bitcore/encoding/varint.js

Central repository for several classes of tools for integrating with, and building for, the Lotusia ecosystem

import { BufferWriter } from './bufferwriter.js';
import { BufferReader } from './bufferreader.js';
import { BN } from '../crypto/bn.js';
export class Varint {
    buf = Buffer.alloc(0);
    constructor(buf) {
        if (Buffer.isBuffer(buf)) {
            this.buf = buf;
        }
        else if (typeof buf === 'number') {
            const num = buf;
            this.fromNumber(num);
        }
        else if (buf instanceof BN) {
            const bn = buf;
            this.fromBN(bn);
        }
        else if (buf) {
            const obj = buf;
            this.set(obj);
        }
    }
    set(obj) {
        this.buf = obj.buf || this.buf;
        return this;
    }
    fromString(str) {
        this.set({
            buf: Buffer.from(str, 'hex'),
        });
        return this;
    }
    toString() {
        return this.buf.toString('hex');
    }
    fromBuffer(buf) {
        this.buf = buf;
        return this;
    }
    fromBufferReader(br) {
        this.buf = br.readVarintBuf();
        return this;
    }
    fromBN(bn) {
        this.buf = BufferWriter.varintBufBN(bn);
        return this;
    }
    fromNumber(num) {
        this.buf = new BufferWriter().writeVarintNum(num).concat();
        return this;
    }
    toBuffer() {
        return this.buf;
    }
    toBN() {
        return new BufferReader(this.buf).readVarintBN();
    }
    toNumber() {
        return new BufferReader(this.buf).readVarintNum();
    }
}