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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/_esm/utils/encoding
Просмотр файла: toRlp.js
import { BaseError } from '../../errors/base.js';
import { createCursor, } from '../cursor.js';
import { hexToBytes } from './toBytes.js';
import { bytesToHex } from './toHex.js';
export function toRlp(bytes, to = 'hex') {
const encodable = getEncodable(bytes);
const cursor = createCursor(new Uint8Array(encodable.length));
encodable.encode(cursor);
if (to === 'hex')
return bytesToHex(cursor.bytes);
return cursor.bytes;
}
export function bytesToRlp(bytes, to = 'bytes') {
return toRlp(bytes, to);
}
export function hexToRlp(hex, to = 'hex') {
return toRlp(hex, to);
}
function getEncodable(bytes) {
if (Array.isArray(bytes))
return getEncodableList(bytes.map((x) => getEncodable(x)));
return getEncodableBytes(bytes);
}
function getEncodableList(list) {
const bodyLength = list.reduce((acc, x) => acc + x.length, 0);
const sizeOfBodyLength = getSizeOfLength(bodyLength);
const length = (() => {
if (bodyLength <= 55)
return 1 + bodyLength;
return 1 + sizeOfBodyLength + bodyLength;
})();
return {
length,
encode(cursor) {
if (bodyLength <= 55) {
cursor.pushByte(0xc0 + bodyLength);
}
else {
cursor.pushByte(0xc0 + 55 + sizeOfBodyLength);
if (sizeOfBodyLength === 1)
cursor.pushUint8(bodyLength);
else if (sizeOfBodyLength === 2)
cursor.pushUint16(bodyLength);
else if (sizeOfBodyLength === 3)
cursor.pushUint24(bodyLength);
else
cursor.pushUint32(bodyLength);
}
for (const { encode } of list) {
encode(cursor);
}
},
};
}
function getEncodableBytes(bytesOrHex) {
const bytes = typeof bytesOrHex === 'string' ? hexToBytes(bytesOrHex) : bytesOrHex;
const sizeOfBytesLength = getSizeOfLength(bytes.length);
const length = (() => {
if (bytes.length === 1 && bytes[0] < 0x80)
return 1;
if (bytes.length <= 55)
return 1 + bytes.length;
return 1 + sizeOfBytesLength + bytes.length;
})();
return {
length,
encode(cursor) {
if (bytes.length === 1 && bytes[0] < 0x80) {
cursor.pushBytes(bytes);
}
else if (bytes.length <= 55) {
cursor.pushByte(0x80 + bytes.length);
cursor.pushBytes(bytes);
}
else {
cursor.pushByte(0x80 + 55 + sizeOfBytesLength);
if (sizeOfBytesLength === 1)
cursor.pushUint8(bytes.length);
else if (sizeOfBytesLength === 2)
cursor.pushUint16(bytes.length);
else if (sizeOfBytesLength === 3)
cursor.pushUint24(bytes.length);
else
cursor.pushUint32(bytes.length);
cursor.pushBytes(bytes);
}
},
};
}
function getSizeOfLength(length) {
if (length < 2 ** 8)
return 1;
if (length < 2 ** 16)
return 2;
if (length < 2 ** 24)
return 3;
if (length < 2 ** 32)
return 4;
throw new BaseError('Length is too large.');
}
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