"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeSpan = exports.SPAN_SIZE = void 0;
const error_1 = require("../utils/error");
exports.SPAN_SIZE = 8;
// we limit the maximum span size in 32 bits to avoid BigInt compatibility issues
const MAX_SPAN_LENGTH = Math.pow(2, 32) - 1;
/**
 * Create a span for storing the length of the chunk
 *
 * The length is encoded in 64-bit little endian.
 *
 * @param length The length of the span
 */
function makeSpan(length) {
    if (length <= 0) {
        throw new error_1.BeeArgumentError('invalid length for span', length);
    }
    if (length > MAX_SPAN_LENGTH) {
        throw new error_1.BeeArgumentError('invalid length (> MAX_SPAN_LENGTH)', length);
    }
    const span = new Uint8Array(exports.SPAN_SIZE);
    const dataView = new DataView(span.buffer);
    const littleEndian = true;
    const lengthLower32 = length & 0xffffffff;
    dataView.setUint32(0, lengthLower32, littleEndian);
    return span;
}
exports.makeSpan = makeSpan;