Update to use commitment trees for anchors

librustzcash-wrapper/src/lib.rs

@@ -1647,24 +1647,24 @@ pub extern "C" fn rust_wrapper_create_transaction(
     out_len: &mut usize){
     let sap_wit_in: Vec<u8> = marshall_from_haskell_var(sap_wit, sap_wit_len, RW);
     let sap_wit_reader = Cursor::new(sap_wit_in);
-    let sap_iw: Option<IncrementalWitness<Node, SAPLING_DEPTH>> = read_incremental_witness(sap_wit_reader).ok();
+    let sap_iw = read_commitment_tree::<Node, Cursor<Vec<u8>>, SAPLING_DEPTH>(sap_wit_reader);
     let sap_anchor = match sap_iw {
-        Some(s_iw) => {
+        Ok(s_iw) => {
             Some(SaplingAnchor::from(s_iw.root()))
         },
-        None => {
+        Err(_e) => {
             None
         }
     };
     println!("{:?}", sap_anchor);
     let orch_wit_in: Vec<u8> = marshall_from_haskell_var(orch_wit, orch_wit_len, RW);
     let orch_wit_reader = Cursor::new(orch_wit_in);
-    let orch_iw: Option<IncrementalWitness<MerkleHashOrchard, 32>> = read_incremental_witness(orch_wit_reader).ok();
+    let orch_iw = read_commitment_tree::<MerkleHashOrchard, Cursor<Vec<u8>>, 32>(orch_wit_reader);
     let orch_anchor = match orch_iw {
-        Some(o_iw) => {
+        Ok(o_iw) => {
             Some(OrchardAnchor::from(o_iw.root()))
         },
-        None => {
+        Err(_e) => {
             None
         }
     }; 

src/ZcashHaskell/Utils.hs

@@ -123,8 +123,8 @@ readZebraTransaction hex =
     rawTx = (withPureBorshVarBuffer . rustWrapperTxRead) $ hexBytes hex
 
 createTransaction ::
-     Maybe SaplingWitness -- ^ to obtain the Sapling anchor
+     Maybe SaplingCommitmentTree -- ^ to obtain the Sapling anchor
-  -> Maybe OrchardWitness -- ^ to obtain the Orchard anchor
+  -> Maybe OrchardCommitmentTree -- ^ to obtain the Orchard anchor
   -> [TransparentTxSpend] -- ^ the list of transparent notes to spend
   -> [SaplingTxSpend] -- ^ the list of Sapling notes to spend
   -> [OrchardTxSpend] -- ^ the list of Orchard notes to spend
@@ -156,10 +156,10 @@ createTransaction sapAnchor orchAnchor tSpend sSpend oSpend outgoing sParams oPa
       rustWrapperCreateTx
         (case sapAnchor of
            Nothing -> "0"
-           Just sA -> toBytes $ sapWit sA)
+           Just sA -> toBytes $ sapTree sA)
         (case orchAnchor of
            Nothing -> "0"
-           Just oA -> toBytes $ orchWit oA)
+           Just oA -> toBytes $ orchTree oA)
         tSpend
         sSpend
         oSpend