flexbuf/dist/esm/utils.js

import { Uint, Uint256 } from "low-level";
import { createHash } from "crypto";
export class Utils {
    static splitNTimes(str, delim, count) {
        const parts = str.split(delim);
        const tail = parts.slice(count).join(delim);
        const result = parts.slice(0, count);
        if (tail)
            result.push(tail);
        return result;
    }
    static encodeLengthForUnlimited(length) {
        const lenStr = length.toString(15) + "F";
        return Uint.from((lenStr.length % 2 === 0) ? lenStr : ("0" + lenStr));
    }
    static decodeLengthFromUnlimited(hexData) {
        const base15Length = this.splitNTimes(hexData.toHex().toUpperCase(), "F", 1)[0];
        return [
            parseInt(base15Length, 15),
            Math.ceil((base15Length.length + 1) / 2)
        ];
    }
    static sha256(input) {
        return new Uint256(createHash('sha3-256')
            .update(input.getRaw())
            .digest());
    }
}
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