Enhance code readability with detailed comments

This commit adds helpful comments throughout the TypeScript code, making it easier to understand and maintain. The comments explain the purpose of each function, variable, and constant, as well as provide context for key operations in the code.

packages/core/src/encoding.ts

@@ -1,20 +1,21 @@
-import { bech32m } from 'bech32';
-import secp256k1 from 'secp256k1';
-import { Buffer } from 'buffer';
-import { Network } from 'bitcoinjs-lib';
-import { bitcoin } from 'bitcoinjs-lib/src/networks';
+import { bech32m } from 'bech32'; // Import the Bech32 library for encoding and decoding addresses
+import secp256k1 from 'secp256k1'; // Import the Secp256k1 library for cryptographic operations
+import { Buffer } from 'buffer'; // Import the Buffer library for handling binary data
+import { Network } from 'bitcoinjs-lib'; // Import the BitcoinJS library for working with Bitcoin networks and addresses
+import { bitcoin } from 'bitcoinjs-lib/src/networks'; // Import the default Bitcoin network settings
 import {
     createTaggedHash,
     encodingLength,
     readVarInt,
     serialiseUint32,
-} from './utility';
-import { SilentBlock } from './interface';
+} from './utility'; // Import utility functions for creating and parsing silent payment addresses
+import { SilentBlock } from './interface'; // Import the interface for handling silent payment blocks
 
+// Export a function to encode a silent payment address using the provided scan and spend public keys, as well as the specified version and network settings
 export const encodeSilentPaymentAddress = (
     scanPubKey: Uint8Array,
     spendPubKey: Uint8Array,
-    network: Network = bitcoin,
+    network: Network = bitcoin, // Set the default network to Bitcoin if not provided
     version: number = 0,
 ): string => {
     const data = bech32m.toWords(Buffer.concat([scanPubKey, spendPubKey]));
@@ -23,9 +24,10 @@ export const encodeSilentPaymentAddress = (
     return bech32m.encode(hrpFromNetwork(network), data, 1023);
 };
 
+// Export a function to decode a silent payment address using the provided network settings
 export const decodeSilentPaymentAddress = (
     address: string,
-    network: Network = bitcoin,
+    network: Network = bitcoin, // Set the default network to Bitcoin if not provided
 ): { scanKey: Buffer; spendKey: Buffer } => {
     const { prefix, words } = bech32m.decode(address, 1023);
     if (prefix != hrpFromNetwork(network)) throw new Error('Invalid prefix!');
@@ -41,11 +43,12 @@ export const decodeSilentPaymentAddress = (
     };
 };
 
+// Export a function to create a labeled silent payment address using the provided scan private key, spend public key, m value, version, and network settings
 export const createLabeledSilentPaymentAddress = (
     scanPrivKey: Uint8Array,
     spendPubKey: Uint8Array,
     m: number,
-    network: Network = bitcoin,
+    network: Network = bitcoin, // Set the default network to Bitcoin if not provided
     version: number = 0,
 ) => {
     const label = createTaggedHash(
@@ -66,10 +69,12 @@ export const createLabeledSilentPaymentAddress = (
     );
 };
 
+// Define a helper function to determine the prefix for a given Bitcoin network based on its Bech32 encoding settings
 const hrpFromNetwork = (network: Network): string => {
     return network.bech32 === 'bc' ? 'sp' : 'tsp';
 };
 
+// Export a function to parse a silent payment block from the provided data buffer using utility functions
 export const parseSilentBlock = (data: Buffer): SilentBlock => {
     const type = data.readUInt8(0);
     const transactions = [];