lotus-sdk/dist/lib/bitcore/util/convertBits.js

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

import { Preconditions } from './preconditions.js';
export function convertBits(data, from, to, strict = false) {
    let accumulator = 0;
    let bits = 0;
    const result = [];
    const mask = (1 << to) - 1;
    for (let i = 0; i < data.length; i++) {
        const value = data[i];
        Preconditions.checkArgument(!(value < 0 || value >> from !== 0), 'value', `value ${value}`);
        accumulator = (accumulator << from) | value;
        bits += from;
        while (bits >= to) {
            bits -= to;
            result.push((accumulator >> bits) & mask);
        }
    }
    if (!strict) {
        if (bits > 0) {
            result.push((accumulator << (to - bits)) & mask);
        }
    }
    else {
        Preconditions.checkState(!(bits >= from || (accumulator << (to - bits)) & mask), 'Conversion requires padding but strict mode was used');
    }
    return result;
}