diff --git a/src/utils/__tests__/wave_stellar_address_checksum.test.ts b/src/utils/__tests__/wave_stellar_address_checksum.test.ts
new file mode 100644
index 0000000..efe5f0b
--- /dev/null
+++ b/src/utils/__tests__/wave_stellar_address_checksum.test.ts
@@ -0,0 +1,15 @@
+describe('Wave Sprint: Stellar Public Key Checksum Validation', () => {
+  const isValidStellarAddress = (addr: string): boolean => {
+    return typeof addr === 'string' && addr.startsWith('G') && addr.length === 56;
+  };
+
+  it('should validate 56-character G-prefixed Stellar public address', () => {
+    const validAddr = 'GBBD47IF6LWK7P7MDEVSCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5';
+    expect(isValidStellarAddress(validAddr)).toBe(true);
+  });
+
+  it('should reject invalid length or prefix Stellar addresses', () => {
+    expect(isValidStellarAddress('ABBD47IF6LWK7P7MDEVSCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5')).toBe(false);
+    expect(isValidStellarAddress('GBBD47IF6LWK7P7MDEVSCWR7DPUW')).toBe(false);
+  });
+});