chedder
Version:
101 lines • 2.34 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = void 0;
const ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
let i = 0;
let ALPHABET_MAP = {};
while (i < ALPHABET.length) {
ALPHABET_MAP[ALPHABET.charAt(i)] = i;
i++;
}
function encode(buffer) {
var carry, digits, j;
if (buffer.length === 0) {
return '';
}
i = 0;
j = 0;
digits = [0];
i = 0;
while (i < buffer.length) {
j = 0;
while (j < digits.length) {
digits[j] <<= 8;
j++;
}
digits[0] += buffer[i];
carry = 0;
j = 0;
while (j < digits.length) {
digits[j] += carry;
carry = (digits[j] / 58) | 0;
digits[j] %= 58;
++j;
}
while (carry) {
digits.push(carry % 58);
carry = (carry / 58) | 0;
}
i++;
}
i = 0;
while (buffer[i] === 0 && i < buffer.length - 1) {
digits.push(0);
i++;
}
return digits
.reverse()
.map(function (digit) {
return ALPHABET[digit];
})
.join('');
}
exports.encode = encode;
;
function decode(str) {
if (str === undefined) {
str = '';
}
var bytes, c, carry, j;
if (str.length === 0) {
return new Uint8Array(0);
}
i = 0;
j = 0;
bytes = [0];
i = 0;
while (i < str.length) {
c = str[i];
if (!(c in ALPHABET_MAP)) {
throw new Error("Base58.decode received unacceptable input. Character '" + c + "' is not in the Base58 alphabet.");
}
j = 0;
while (j < bytes.length) {
bytes[j] *= 58;
j++;
}
bytes[0] += ALPHABET_MAP[c];
carry = 0;
j = 0;
while (j < bytes.length) {
bytes[j] += carry;
carry = bytes[j] >> 8;
bytes[j] &= 0xff;
++j;
}
while (carry) {
bytes.push(carry & 0xff);
carry >>= 8;
}
i++;
}
i = 0;
while (str[i] === '1' && i < str.length - 1) {
bytes.push(0);
i++;
}
return new Uint8Array(bytes.reverse());
}
exports.decode = decode;
;
//# sourceMappingURL=bs58.js.map