Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 1x 1x 8650x 1x 1x 93x 93x 99x 93x 93x 93x 93x 8650x 8650x 8650x 93x 82x 82x 136x 82x 82x 82x 7676x 7676x 82x | import { bigFromBufBE, bigToBufBE } from "@node-lightning/bufio"; /** * Returns a tuple containing the quotient and remainder when the divident (num) is * divided by the divisor (mod). * @param num divident * @param mod divisor */ export function divmod(num: bigint, mod: bigint): [bigint, bigint] { return [num / mod, num % mod]; } /** * Base58 encoding and decoding utility */ export class Base58 { public static alphabet: string = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"; /** * Performs base58 encoding by following this process: * * 1. Finds the leading zeros an creates 1's that will be * prefixed * 2. Converts each value into a base58 character by using * the mod operator on the character. * 3. The prefix and results of encoding from the base58 characters * are combined. * @param buf */ public static encode(buf: Buffer): string { // count the leading zero bytes at the front let prefix = ""; for (let i = 0; i < buf.length; i++) { if (buf[i] === 0) prefix += "1"; else break; } // determine what base58 digit to use let num = bigFromBufBE(buf); let result = ""; while (num > 0n) { const [n, mod] = divmod(num, 58n); result = Base58.alphabet[Number(mod)] + result; num = n; } // prepend all the prefixed 0's return prefix + result; } /** * Decodes a base58 string into its original buffer by constructing * a number represented in base58 and converting that number into bytes * @param input */ public static decode(input: string): Buffer { // determine leading zero bytes which will be prepended let prefix = 0; for (let i = 0; i < input.length; i++) { if (input[i] === "1") prefix += 1; else break; } // process remaining bytes let num = 0n; for (const char of input) { num *= 58n; num += BigInt(Base58.alphabet.indexOf(char)); } return Buffer.concat([Buffer.alloc(prefix), bigToBufBE(num)]); } } |