chore(payment): Implement silent payments

src/esm/crypto.js

@@ -35,6 +35,9 @@ export const TAGS = [
   'TapTweak',
   'KeyAgg list',
   'KeyAgg coefficient',
+  'BIP0352/Inputs',
+  'BIP0352/SharedSecret',
+  'BIP0352/Label',
 ];
 /**
  * A collection of tagged hash prefixes used in various BIP (Bitcoin Improvement Proposals)
@@ -108,6 +111,24 @@ export const TAGGED_HASH_PREFIXES = {
     201, 4, 3, 77, 28, 136, 232, 200, 14, 34, 229, 61, 36, 86, 109, 100, 130,
     78, 214, 66, 114, 129, 192, 145, 0, 249, 77, 205, 82, 201, 129,
   ]),
+  'BIP0352/Inputs': Uint8Array.from([
+    30, 123, 150, 235, 22, 10, 104, 129, 159, 151, 118, 75, 67, 213, 215, 126,
+    102, 89, 215, 88, 119, 157, 67, 168, 167, 117, 95, 91, 228, 90, 126, 51, 30,
+    123, 150, 235, 22, 10, 104, 129, 159, 151, 118, 75, 67, 213, 215, 126, 102,
+    89, 215, 88, 119, 157, 67, 168, 167, 117, 95, 91, 228, 90, 126, 51,
+  ]),
+  'BIP0352/SharedSecret': Uint8Array.from([
+    159, 109, 128, 17, 88, 30, 182, 45, 114, 230, 19, 96, 76, 51, 13, 202, 42,
+    11, 211, 73, 226, 74, 70, 217, 162, 239, 36, 185, 169, 143, 65, 189, 159,
+    109, 128, 17, 88, 30, 182, 45, 114, 230, 19, 96, 76, 51, 13, 202, 42, 11,
+    211, 73, 226, 74, 70, 217, 162, 239, 36, 185, 169, 143, 65, 189,
+  ]),
+  'BIP0352/Label': Uint8Array.from([
+    3, 73, 25, 70, 53, 194, 208, 62, 98, 212, 19, 186, 140, 205, 81, 152, 145,
+    144, 23, 161, 233, 156, 190, 105, 31, 90, 52, 169, 147, 119, 224, 149, 3,
+    73, 25, 70, 53, 194, 208, 62, 98, 212, 19, 186, 140, 205, 81, 152, 145, 144,
+    23, 161, 233, 156, 190, 105, 31, 90, 52, 169, 147, 119, 224, 149,
+  ]),
 };
 /**
  * Computes a tagged hash using the specified prefix and data.

src/esm/payments/index.js

@@ -6,6 +6,20 @@ import { p2sh } from './p2sh.js';
 import { p2wpkh } from './p2wpkh.js';
 import { p2wsh } from './p2wsh.js';
 import { p2tr } from './p2tr.js';
-export { embed, p2ms, p2pk, p2pkh, p2sh, p2wpkh, p2wsh, p2tr };
+import { p2sp, scanForSilentPayments, deriveOutput } from './p2sp.js';
+export {
+  embed,
+  p2ms,
+  p2pk,
+  p2pkh,
+  p2sh,
+  p2wpkh,
+  p2wsh,
+  p2tr,
+  p2sp,
+  // TODO how should we expose the two functions below?
+  scanForSilentPayments,
+  deriveOutput,
+};
 // TODO
 // witness commitment