update proto files

lib/proto/compact_formats.proto

@@ -1,6 +1,7 @@
 syntax = "proto3";
 package cash.z.wallet.sdk.rpc;
-option go_package = "walletrpc";
+option go_package = "lightwalletd/walletrpc";
+option swift_prefix = "";
 
 // Remember that proto3 fields are all optional. A field that is not present will be set to its zero value.
 // bytes fields of hashes are in canonical little-endian format.
@@ -11,11 +12,11 @@ option go_package = "walletrpc";
 //   3. Update your witnesses to generate new Sapling spend proofs.
 message CompactBlock {
     uint32 protoVersion = 1; // the version of this wire format, for storage
-    uint64 height = 2; // the height of this block
-    bytes hash = 3;
-    bytes prevHash = 4;
-    uint32 time = 5;
-    bytes header = 6; // (hash, prevHash, and time) OR (full header)
+    uint64 height = 2;       // the height of this block
+    bytes hash = 3;          // the ID (hash) of this block, same as in block explorers
+    bytes prevHash = 4;      // the ID (hash) of this block's predecessor
+    uint32 time = 5;         // Unix epoch time when the block was mined
+    bytes header = 6;        // (hash, prevHash, and time) OR (full header)
     repeated CompactTx vtx = 7; // compact transactions from this block
 }
 
@@ -23,8 +24,8 @@ message CompactTx {
     // Index and hash will allow the receiver to call out to chain
     // explorers or other data structures to retrieve more information
     // about this transaction.
-    uint64 index = 1;
-    bytes hash = 2;
+    uint64 index = 1;   // the index within the full block
+    bytes hash = 2;     // the ID (hash) of this transaction, same as in block explorers
 
     // The transaction fee: present if server can provide. In the case of a
     // stateless server and a transaction with transparent inputs, this will be
@@ -33,16 +34,32 @@ message CompactTx {
     //    valueBalance + (sum(vPubNew) - sum(vPubOld) - sum(tOut))
     uint32 fee = 3;
 
-    repeated CompactSpend spends = 4;
-    repeated CompactOutput outputs = 5;
+    repeated CompactSaplingSpend spends = 4;
+    repeated CompactSaplingOutput outputs = 5;
 }
 
+// CompactSaplingSpend is a Sapling Spend Description as described in 7.3 of the Zcash
+// protocol specification.
+message CompactSaplingSpend {
+    bytes nf = 1;   // nullifier (see the Zcash protocol specification)
+}
+
+// output is a Sapling Output Description as described in section 7.4 of the
+// Zcash protocol spec. Total size is 948.
+message CompactSaplingOutput {
+    bytes cmu = 1;          // note commitment u-coordinate
+    bytes epk = 2;          // ephemeral public key
+    bytes ciphertext = 3;   // first 52 bytes of ciphertext
+}
+
+/*
 message CompactSpend {
-    bytes nf = 1;
+    bytes nf = 1;   // nullifier (see the Zcash protocol specification)
 }
 
 message CompactOutput {
-    bytes cmu = 1;
-    bytes epk = 2;
-    bytes ciphertext = 3;
+    bytes cmu = 1;          // note commitment u-coordinate
+    bytes epk = 2;          // ephemeral public key
+    bytes ciphertext = 3;   // first 52 bytes of ciphertext
 }
+*/