chore(scripts): add endian converter script

Author: NathanFlurry

scripts/misc/endian-converter.ts

@@ -0,0 +1,43 @@
+#!/usr/bin/env tsx
+
+/**
+ * Converts a number from big endian to little endian byte order
+ */
+
+function bigEndianToLittleEndian(num: bigint): bigint {
+	// Convert number to 64-bit buffer (big endian)
+	const buffer = Buffer.allocUnsafe(8);
+	buffer.writeBigUInt64BE(num);
+
+	// Read as little endian
+	const littleEndian = buffer.readBigUInt64LE();
+
+	return littleEndian;
+}
+
+// Main execution
+const inputNumber = process.argv[2] || '360287970189639680';
+const num = BigInt(inputNumber);
+
+console.log('\nBig Endian to Little Endian Conversion\n');
+console.log('='.repeat(50));
+
+// Show original (big endian)
+const beBuf = Buffer.allocUnsafe(8);
+beBuf.writeBigUInt64BE(num);
+console.log('\nOriginal (Big Endian):');
+console.log(`  Decimal: ${num}`);
+console.log(`  Hex: 0x${num.toString(16).padStart(16, '0')}`);
+console.log(`  Bytes: ${Array.from(beBuf).map(b => b.toString(16).padStart(2, '0')).join(' ')}`);
+
+// Convert to little endian
+const leBuf = Buffer.allocUnsafe(8);
+leBuf.writeBigUInt64LE(num);
+const littleEndianValue = leBuf.readBigUInt64BE(); // Read the LE bytes as if they were BE
+
+console.log('\nConverted (Little Endian):');
+console.log(`  Decimal: ${littleEndianValue}`);
+console.log(`  Hex: 0x${littleEndianValue.toString(16).padStart(16, '0')}`);
+console.log(`  Bytes: ${Array.from(leBuf).map(b => b.toString(16).padStart(2, '0')).join(' ')}`);
+
+console.log('\n' + '='.repeat(50) + '\n');