@metamask/abi-utils/dist/iterator.js

Lightweight utilities for encoding and decoding Solidity ABI

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.iterate = void 0;
const utils_1 = require("@metamask/utils");
/**
 * Iterate over a buffer with the specified size. This will yield a part of the
 * buffer starting at an increment of the specified size, until the end of the
 * buffer is reached.
 *
 * Calling the `skip` function will make it skip the specified number of bytes.
 *
 * @param buffer - The buffer to iterate over.
 * @param size - The number of bytes to iterate with.
 * @returns An iterator that yields the parts of the byte array.
 * @yields The parts of the byte array.
 */
const iterate = function* (buffer, size = 32) {
    for (let pointer = 0; pointer < buffer.length; pointer += size) {
        const skip = (length) => {
            (0, utils_1.assert)(length >= 0, 'Cannot skip a negative number of bytes.');
            (0, utils_1.assert)(length % size === 0, 'Length must be a multiple of the size.');
            pointer += length;
        };
        const value = buffer.subarray(pointer);
        yield { skip, value };
    }
    return {
        skip: () => undefined,
        value: new Uint8Array(),
    };
};
exports.iterate = iterate;
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