Resolve "TransactionDocument: replace Vec fields by SmallVec"

Closes #197

lib/dubp/user-docs/src/documents/transaction/v10.rs

@@ -291,11 +291,11 @@ pub struct TransactionDocumentV10 {
     /// Document issuers.
     issuers: SmallVec<[PubKey; 4]>,
     /// Transaction inputs.
-    inputs: Vec<TransactionInputV10>,
+    inputs: SmallVec<[TransactionInputV10; 32]>,
     /// Inputs unlocks.
-    unlocks: Vec<TransactionInputUnlocksV10>,
+    unlocks: SmallVec<[TransactionInputUnlocksV10; 32]>,
     /// Transaction outputs.
-    outputs: Vec<TransactionOutputV10>,
+    outputs: SmallVec<[TransactionOutputV10; 8]>,
     /// Transaction comment
     comment: String,
     /// Document signatures.
@@ -409,9 +409,9 @@ impl TransactionDocumentV10 {
         let mut blockstamp = Blockstamp::default();
         let mut locktime = 0;
         let mut issuers = SmallVec::<[PubKey; 4]>::new();
-        let mut inputs = Vec::new();
-        let mut unlocks = Vec::new();
-        let mut outputs = Vec::new();
+        let mut inputs = SmallVec::new();
+        let mut unlocks = SmallVec::new();
+        let mut outputs = SmallVec::new();
         let mut comment = "";
         let mut sigs = SmallVec::<[Sig; 4]>::new();
 
@@ -600,9 +600,9 @@ impl<'a> TransactionDocumentV10Builder<'a> {
             blockstamp: *self.blockstamp,
             locktime: *self.locktime,
             issuers: SmallVec::from_slice(self.issuers),
-            inputs: self.inputs.to_vec(),
-            unlocks: self.unlocks.to_vec(),
-            outputs: self.outputs.to_vec(),
+            inputs: SmallVec::from_slice(self.inputs),
+            unlocks: SmallVec::from(self.unlocks),
+            outputs: SmallVec::from(self.outputs),
             comment: String::from(self.comment),
             signatures: SmallVec::from_vec(signatures),
             hash: self.hash,