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
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JavaScript
;
import { Logger } from "@ethersproject/logger";
import { version } from "./_version";
const logger = new Logger(version);
///////////////////////////////
function isHexable(value) {
return !!(value.toHexString);
}
function addSlice(array) {
if (array.slice) {
return array;
}
array.slice = function () {
const args = Array.prototype.slice.call(arguments);
return addSlice(new Uint8Array(Array.prototype.slice.apply(array, args)));
};
return array;
}
export function isBytesLike(value) {
return ((isHexString(value) && !(value.length % 2)) || isBytes(value));
}
function isInteger(value) {
return (typeof (value) === "number" && value == value && (value % 1) === 0);
}
export function isBytes(value) {
if (value == null) {
return false;
}
if (value.constructor === Uint8Array) {
return true;
}
if (typeof (value) === "string") {
return false;
}
if (!isInteger(value.length) || value.length < 0) {
return false;
}
for (let i = 0; i < value.length; i++) {
const v = value[i];
if (!isInteger(v) || v < 0 || v >= 256) {
return false;
}
}
return true;
}
export function arrayify(value, options) {
if (!options) {
options = {};
}
if (typeof (value) === "number") {
logger.checkSafeUint53(value, "invalid arrayify value");
const result = [];
while (value) {
result.unshift(value & 0xff);
value = parseInt(String(value / 256));
}
if (result.length === 0) {
result.push(0);
}
return addSlice(new Uint8Array(result));
}
if (options.allowMissingPrefix && typeof (value) === "string" && value.substring(0, 2) !== "0x") {
value = "0x" + value;
}
if (isHexable(value)) {
value = value.toHexString();
}
if (isHexString(value)) {
let hex = value.substring(2);
if (hex.length % 2) {
if (options.hexPad === "left") {
hex = "0x0" + hex.substring(2);
}
else if (options.hexPad === "right") {
hex += "0";
}
else {
logger.throwArgumentError("hex data is odd-length", "value", value);
}
}
const result = [];
for (let i = 0; i < hex.length; i += 2) {
result.push(parseInt(hex.substring(i, i + 2), 16));
}
return addSlice(new Uint8Array(result));
}
if (isBytes(value)) {
return addSlice(new Uint8Array(value));
}
return logger.throwArgumentError("invalid arrayify value", "value", value);
}
export function concat(items) {
const objects = items.map(item => arrayify(item));
const length = objects.reduce((accum, item) => (accum + item.length), 0);
const result = new Uint8Array(length);
objects.reduce((offset, object) => {
result.set(object, offset);
return offset + object.length;
}, 0);
return addSlice(result);
}
export function stripZeros(value) {
let result = arrayify(value);
if (result.length === 0) {
return result;
}
// Find the first non-zero entry
let start = 0;
while (start < result.length && result[start] === 0) {
start++;
}
// If we started with zeros, strip them
if (start) {
result = result.slice(start);
}
return result;
}
export function zeroPad(value, length) {
value = arrayify(value);
if (value.length > length) {
logger.throwArgumentError("value out of range", "value", arguments[0]);
}
const result = new Uint8Array(length);
result.set(value, length - value.length);
return addSlice(result);
}
export function isHexString(value, length) {
if (typeof (value) !== "string" || !value.match(/^0x[0-9A-Fa-f]*$/)) {
return false;
}
if (length && value.length !== 2 + 2 * length) {
return false;
}
return true;
}
const HexCharacters = "0123456789abcdef";
export function hexlify(value, options) {
if (!options) {
options = {};
}
if (typeof (value) === "number") {
logger.checkSafeUint53(value, "invalid hexlify value");
let hex = "";
while (value) {
hex = HexCharacters[value & 0xf] + hex;
value = Math.floor(value / 16);
}
if (hex.length) {
if (hex.length % 2) {
hex = "0" + hex;
}
return "0x" + hex;
}
return "0x00";
}
if (typeof (value) === "bigint") {
value = value.toString(16);
if (value.length % 2) {
return ("0x0" + value);
}
return "0x" + value;
}
if (options.allowMissingPrefix && typeof (value) === "string" && value.substring(0, 2) !== "0x") {
value = "0x" + value;
}
if (isHexable(value)) {
return value.toHexString();
}
if (isHexString(value)) {
if (value.length % 2) {
if (options.hexPad === "left") {
value = "0x0" + value.substring(2);
}
else if (options.hexPad === "right") {
value += "0";
}
else {
logger.throwArgumentError("hex data is odd-length", "value", value);
}
}
return value.toLowerCase();
}
if (isBytes(value)) {
let result = "0x";
for (let i = 0; i < value.length; i++) {
let v = value[i];
result += HexCharacters[(v & 0xf0) >> 4] + HexCharacters[v & 0x0f];
}
return result;
}
return logger.throwArgumentError("invalid hexlify value", "value", value);
}
/*
function unoddify(value: BytesLike | Hexable | number): BytesLike | Hexable | number {
if (typeof(value) === "string" && value.length % 2 && value.substring(0, 2) === "0x") {
return "0x0" + value.substring(2);
}
return value;
}
*/
export function hexDataLength(data) {
if (typeof (data) !== "string") {
data = hexlify(data);
}
else if (!isHexString(data) || (data.length % 2)) {
return null;
}
return (data.length - 2) / 2;
}
export function hexDataSlice(data, offset, endOffset) {
if (typeof (data) !== "string") {
data = hexlify(data);
}
else if (!isHexString(data) || (data.length % 2)) {
logger.throwArgumentError("invalid hexData", "value", data);
}
offset = 2 + 2 * offset;
if (endOffset != null) {
return "0x" + data.substring(offset, 2 + 2 * endOffset);
}
return "0x" + data.substring(offset);
}
export function hexConcat(items) {
let result = "0x";
items.forEach((item) => {
result += hexlify(item).substring(2);
});
return result;
}
export function hexValue(value) {
const trimmed = hexStripZeros(hexlify(value, { hexPad: "left" }));
if (trimmed === "0x") {
return "0x0";
}
return trimmed;
}
export function hexStripZeros(value) {
if (typeof (value) !== "string") {
value = hexlify(value);
}
if (!isHexString(value)) {
logger.throwArgumentError("invalid hex string", "value", value);
}
value = value.substring(2);
let offset = 0;
while (offset < value.length && value[offset] === "0") {
offset++;
}
return "0x" + value.substring(offset);
}
export function hexZeroPad(value, length) {
if (typeof (value) !== "string") {
value = hexlify(value);
}
else if (!isHexString(value)) {
logger.throwArgumentError("invalid hex string", "value", value);
}
if (value.length > 2 * length + 2) {
logger.throwArgumentError("value out of range", "value", arguments[1]);
}
while (value.length < 2 * length + 2) {
value = "0x0" + value.substring(2);
}
return value;
}
export function splitSignature(signature) {
const result = {
r: "0x",
s: "0x",
_vs: "0x",
recoveryParam: 0,
v: 0
};
if (isBytesLike(signature)) {
const bytes = arrayify(signature);
if (bytes.length !== 65) {
logger.throwArgumentError("invalid signature string; must be 65 bytes", "signature", signature);
}
// Get the r, s and v
result.r = hexlify(bytes.slice(0, 32));
result.s = hexlify(bytes.slice(32, 64));
result.v = bytes[64];
// Allow a recid to be used as the v
if (result.v < 27) {
if (result.v === 0 || result.v === 1) {
result.v += 27;
}
else {
logger.throwArgumentError("signature invalid v byte", "signature", signature);
}
}
// Compute recoveryParam from v
result.recoveryParam = 1 - (result.v % 2);
// Compute _vs from recoveryParam and s
if (result.recoveryParam) {
bytes[32] |= 0x80;
}
result._vs = hexlify(bytes.slice(32, 64));
}
else {
result.r = signature.r;
result.s = signature.s;
result.v = signature.v;
result.recoveryParam = signature.recoveryParam;
result._vs = signature._vs;
// If the _vs is available, use it to populate missing s, v and recoveryParam
// and verify non-missing s, v and recoveryParam
if (result._vs != null) {
const vs = zeroPad(arrayify(result._vs), 32);
result._vs = hexlify(vs);
// Set or check the recid
const recoveryParam = ((vs[0] >= 128) ? 1 : 0);
if (result.recoveryParam == null) {
result.recoveryParam = recoveryParam;
}
else if (result.recoveryParam !== recoveryParam) {
logger.throwArgumentError("signature recoveryParam mismatch _vs", "signature", signature);
}
// Set or check the s
vs[0] &= 0x7f;
const s = hexlify(vs);
if (result.s == null) {
result.s = s;
}
else if (result.s !== s) {
logger.throwArgumentError("signature v mismatch _vs", "signature", signature);
}
}
// Use recid and v to populate each other
if (result.recoveryParam == null) {
if (result.v == null) {
logger.throwArgumentError("signature missing v and recoveryParam", "signature", signature);
}
else if (result.v === 0 || result.v === 1) {
result.recoveryParam = result.v;
}
else {
result.recoveryParam = 1 - (result.v % 2);
}
}
else {
if (result.v == null) {
result.v = 27 + result.recoveryParam;
}
else {
const recId = (result.v === 0 || result.v === 1) ? result.v : (1 - (result.v % 2));
if (result.recoveryParam !== recId) {
logger.throwArgumentError("signature recoveryParam mismatch v", "signature", signature);
}
}
}
if (result.r == null || !isHexString(result.r)) {
logger.throwArgumentError("signature missing or invalid r", "signature", signature);
}
else {
result.r = hexZeroPad(result.r, 32);
}
if (result.s == null || !isHexString(result.s)) {
logger.throwArgumentError("signature missing or invalid s", "signature", signature);
}
else {
result.s = hexZeroPad(result.s, 32);
}
const vs = arrayify(result.s);
if (vs[0] >= 128) {
logger.throwArgumentError("signature s out of range", "signature", signature);
}
if (result.recoveryParam) {
vs[0] |= 0x80;
}
const _vs = hexlify(vs);
if (result._vs) {
if (!isHexString(result._vs)) {
logger.throwArgumentError("signature invalid _vs", "signature", signature);
}
result._vs = hexZeroPad(result._vs, 32);
}
// Set or check the _vs
if (result._vs == null) {
result._vs = _vs;
}
else if (result._vs !== _vs) {
logger.throwArgumentError("signature _vs mismatch v and s", "signature", signature);
}
}
return result;
}
export function joinSignature(signature) {
signature = splitSignature(signature);
return hexlify(concat([
signature.r,
signature.s,
(signature.recoveryParam ? "0x1c" : "0x1b")
]));
}
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