saepenatus
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Web3-Onboard makes it simple to connect Ethereum hardware and software wallets to your dapp. Features standardised spec compliant web3 providers for all supported wallets, framework agnostic modern javascript UI with code splitting, CSS customization, mul
124 lines • 4.93 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = void 0;
//See: https://github.com/ethereum/wiki/wiki/RLP
var bytes_1 = require("@ethersproject/bytes");
var logger_1 = require("@ethersproject/logger");
var _version_1 = require("./_version");
var logger = new logger_1.Logger(_version_1.version);
function arrayifyInteger(value) {
var result = [];
while (value) {
result.unshift(value & 0xff);
value >>= 8;
}
return result;
}
function unarrayifyInteger(data, offset, length) {
var result = 0;
for (var i = 0; i < length; i++) {
result = (result * 256) + data[offset + i];
}
return result;
}
function _encode(object) {
if (Array.isArray(object)) {
var payload_1 = [];
object.forEach(function (child) {
payload_1 = payload_1.concat(_encode(child));
});
if (payload_1.length <= 55) {
payload_1.unshift(0xc0 + payload_1.length);
return payload_1;
}
var length_1 = arrayifyInteger(payload_1.length);
length_1.unshift(0xf7 + length_1.length);
return length_1.concat(payload_1);
}
if (!(0, bytes_1.isBytesLike)(object)) {
logger.throwArgumentError("RLP object must be BytesLike", "object", object);
}
var data = Array.prototype.slice.call((0, bytes_1.arrayify)(object));
if (data.length === 1 && data[0] <= 0x7f) {
return data;
}
else if (data.length <= 55) {
data.unshift(0x80 + data.length);
return data;
}
var length = arrayifyInteger(data.length);
length.unshift(0xb7 + length.length);
return length.concat(data);
}
function encode(object) {
return (0, bytes_1.hexlify)(_encode(object));
}
exports.encode = encode;
function _decodeChildren(data, offset, childOffset, length) {
var result = [];
while (childOffset < offset + 1 + length) {
var decoded = _decode(data, childOffset);
result.push(decoded.result);
childOffset += decoded.consumed;
if (childOffset > offset + 1 + length) {
logger.throwError("child data too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
}
return { consumed: (1 + length), result: result };
}
// returns { consumed: number, result: Object }
function _decode(data, offset) {
if (data.length === 0) {
logger.throwError("data too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
// Array with extra length prefix
if (data[offset] >= 0xf8) {
var lengthLength = data[offset] - 0xf7;
if (offset + 1 + lengthLength > data.length) {
logger.throwError("data short segment too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
var length_2 = unarrayifyInteger(data, offset + 1, lengthLength);
if (offset + 1 + lengthLength + length_2 > data.length) {
logger.throwError("data long segment too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
return _decodeChildren(data, offset, offset + 1 + lengthLength, lengthLength + length_2);
}
else if (data[offset] >= 0xc0) {
var length_3 = data[offset] - 0xc0;
if (offset + 1 + length_3 > data.length) {
logger.throwError("data array too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
return _decodeChildren(data, offset, offset + 1, length_3);
}
else if (data[offset] >= 0xb8) {
var lengthLength = data[offset] - 0xb7;
if (offset + 1 + lengthLength > data.length) {
logger.throwError("data array too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
var length_4 = unarrayifyInteger(data, offset + 1, lengthLength);
if (offset + 1 + lengthLength + length_4 > data.length) {
logger.throwError("data array too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
var result = (0, bytes_1.hexlify)(data.slice(offset + 1 + lengthLength, offset + 1 + lengthLength + length_4));
return { consumed: (1 + lengthLength + length_4), result: result };
}
else if (data[offset] >= 0x80) {
var length_5 = data[offset] - 0x80;
if (offset + 1 + length_5 > data.length) {
logger.throwError("data too short", logger_1.Logger.errors.BUFFER_OVERRUN, {});
}
var result = (0, bytes_1.hexlify)(data.slice(offset + 1, offset + 1 + length_5));
return { consumed: (1 + length_5), result: result };
}
return { consumed: 1, result: (0, bytes_1.hexlify)(data[offset]) };
}
function decode(data) {
var bytes = (0, bytes_1.arrayify)(data);
var decoded = _decode(bytes, 0);
if (decoded.consumed !== bytes.length) {
logger.throwArgumentError("invalid rlp data", "data", data);
}
return decoded.result;
}
exports.decode = decode;
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