feat: allow blobs, buckets to process metadata/recovery hash

Author: dtbuchholz

src/util/LibBlob.sol

@@ -300,7 +300,9 @@ library LibBlob {
         encoded[1] = params.source.encodeCborBlobHashOrNodeId();
         encoded[2] = params.blobHash.encodeCborBlobHashOrNodeId();
         // TODO: this value is currently hardcoded, but it'll eventually use the same method above
-        encoded[3] = hex"0000000000000000000000000000000000000000000000000000000000000000".encodeCborFixedArray();
+        encoded[3] = bytes(params.metadataHash).length == 0
+            ? hex"0000000000000000000000000000000000000000000000000000000000000000".encodeCborFixedArray()
+            : params.metadataHash.encodeCborBlobHashOrNodeId();
         encoded[4] = encodeSubscriptionId(params.subscriptionId);
         encoded[5] = params.size.encodeCborUint64();
         encoded[6] = params.ttl == 0 ? LibWasm.encodeCborNull() : params.ttl.encodeCborUint64();

src/util/LibBucket.sol

@@ -145,7 +145,9 @@ library LibBucket {
         encoded[2] = params.blobHash.encodeCborBlobHashOrNodeId();
         // TODO: this currently is hardcoded to a 32 byte array of all zeros, but should use the method above
         // Once https://github.com/hokunet/ipc/issues/300 is merged, this'll need to change
-        encoded[3] = hex"0000000000000000000000000000000000000000000000000000000000000000".encodeCborFixedArray();
+        encoded[3] = bytes(params.recoveryHash).length == 0
+            ? hex"0000000000000000000000000000000000000000000000000000000000000000".encodeCborFixedArray()
+            : params.recoveryHash.encodeCborBlobHashOrNodeId();
         encoded[4] = params.size.encodeCborUint64();
         encoded[5] = params.ttl == 0 ? LibWasm.encodeCborNull() : params.ttl.encodeCborUint64();
         encoded[6] = params.metadata.encodeCborKeyValueMap();