Fix stale RN test bindings and drop unused cdk dependency

Two follow-ups surfaced by the P2PK validation change:

The koffi declaration in native.test.mjs still described the old
ten-parameter ABI and omitted num_sigs_refund, so the sig_flag argument
bound to the wrong slot and the call read a garbage eleventh argument,
returning null. Update the declaration and its call sites to match the
current C signature. The output-data-creator tests used a past locktime
(1700000000) that the validated constructor now rejects; move them to a
far-future value.

Drop the cdk path dependency from the binding's Cargo.toml. The Rust
source only uses cashu, and pulling in cdk forced Cargo to build cdk and
its transitive dependencies for every native target with no benefit.

Author: crodas

Cargo.lock

@@ -18,4 +18,3 @@ unwrap_used = "allow"
 
 [dependencies]
 cashu = { path = "../../../crates/cashu" }
-cdk = { path = "../../../crates/cdk", default-features = false }

bindings/react-native/rust/Cargo.toml

@@ -60,7 +60,7 @@ const cdk_create_p2pk_blinded_message = lib.func(
     'const char **additional_pubkeys, uint32_t additional_pubkeys_len, ' +
     'uint64_t num_sigs, uint64_t locktime, ' +
     'const char **refund_pubkeys, uint32_t refund_pubkeys_len, ' +
-    'const char *sig_flag)',
+    'uint64_t num_sigs_refund, const char *sig_flag)',
 );
 
 const cdk_create_deterministic_blinded_message = lib.func(
@@ -118,7 +118,7 @@ describe('cdk_create_p2pk_blinded_message', () => {
 
   it('returns non-null for a valid pubkey', () => {
     const ptr = cdk_create_p2pk_blinded_message(
-      1, KEYSET_ID, PUBKEY, null, 0, 1, 0, null, 0, 'SigInputs',
+      1, KEYSET_ID, PUBKEY, null, 0, 1, 0, null, 0, 0, 'SigInputs',
     );
     assert.ok(ptr, 'result should not be null');
     const res = decode(ptr);
@@ -128,7 +128,7 @@ describe('cdk_create_p2pk_blinded_message', () => {
 
   it('returns null for an invalid pubkey', () => {
     const ptr = cdk_create_p2pk_blinded_message(
-      1, KEYSET_ID, 'not-a-key', null, 0, 1, 0, null, 0, 'SigInputs',
+      1, KEYSET_ID, 'not-a-key', null, 0, 1, 0, null, 0, 0, 'SigInputs',
     );
     assert.equal(ptr, null, 'invalid pubkey should return null');
   });

bindings/react-native/test/native.test.mjs

@@ -121,10 +121,11 @@ describe('createSingleP2PKData', () => {
   });
 
   it('supports locktime', () => {
-    const p2pk = { pubkey: TEST_PUBKEY, locktime: 1700000000 };
+    // Far-future locktime; the validated constructor rejects past ones.
+    const p2pk = { pubkey: TEST_PUBKEY, locktime: 4102444800 };
     const output = creator.createSingleP2PKData(p2pk, 1, KEYSET_ID);
 
-    assert.ok(output.secret.includes('1700000000'), 'locktime should appear in secret');
+    assert.ok(output.secret.includes('4102444800'), 'locktime should appear in secret');
   });
 
   it('supports multisig with additional pubkeys', () => {
@@ -143,12 +144,12 @@ describe('createSingleP2PKData', () => {
     const p2pk = {
       pubkey: TEST_PUBKEY,
       refundPubkeys: [TEST_PUBKEY],
-      locktime: 1700000000,
+      locktime: 4102444800,
     };
     const output = creator.createSingleP2PKData(p2pk, 1, KEYSET_ID);
 
     assert.ok(output.secret.includes('P2PK'));
-    assert.ok(output.secret.includes('1700000000'));
+    assert.ok(output.secret.includes('4102444800'));
   });
 });