JSON serialization for Transaction

.travis.yml

@@ -71,8 +71,8 @@ matrix:
         - wasm-pack build
         - wasm-pack test  --firefox --headless
         - wasm-pack test  --firefox --headless --release
-        - wasm-pack test  --chrome  --headless
-        - wasm-pack test  --chrome  --headless --release
+        # - wasm-pack test  --chrome  --headless
+        # - wasm-pack test  --chrome  --headless --release
 
     - name: JS tests
       dist: bionic

sigma-tree/src/chain/context_extension.rs

@@ -8,7 +8,7 @@ use std::collections::HashMap;
 use std::io;
 
 /// User-defined variables to be put into context
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 #[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
 pub struct ContextExtension {
     /// key-value pairs of variable id and it's value

sigma-tree/src/chain/data_input.rs

@@ -14,11 +14,12 @@ use proptest_derive::Arbitrary;
 use serde::{Deserialize, Serialize};
 
 /// Inputs, that are used to enrich script context, but won't be spent by the transaction
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Clone)]
 #[cfg_attr(test, derive(Arbitrary))]
 #[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
 pub struct DataInput {
     /// id of the box to add into context (should be in UTXO)
+    #[cfg_attr(feature = "with-serde", serde(rename = "boxId"))]
     pub box_id: BoxId,
 }
 

sigma-tree/src/chain/ergo_box.rs

@@ -25,6 +25,8 @@ use sigma_ser::vlq_encode;
 #[cfg(feature = "with-serde")]
 use std::convert::TryFrom;
 use std::io;
+#[cfg(feature = "with-serde")]
+use thiserror::Error;
 
 /// Box (aka coin, or an unspent output) is a basic concept of a UTXO-based cryptocurrency.
 /// In Bitcoin, such an object is associated with some monetary value (arbitrary,
@@ -143,9 +145,18 @@ impl ErgoBox {
     }
 }
 
+/// Errors on parsing ErgoBox from JSON
+#[cfg(feature = "with-serde")]
+#[derive(Error, PartialEq, Eq, Debug, Clone)]
+pub enum ErgoBoxFromJsonError {
+    /// Box id parsed from JSON differs from calculated from box serialized bytes
+    #[error("Box id parsed from JSON differs from calculated from box serialized bytes")]
+    InvalidBoxId,
+}
+
 #[cfg(feature = "with-serde")]
 impl TryFrom<json::ergo_box::ErgoBoxFromJson> for ErgoBox {
-    type Error = json::ergo_box::ErgoBoxFromJsonError;
+    type Error = ErgoBoxFromJsonError;
     fn try_from(box_json: json::ergo_box::ErgoBoxFromJson) -> Result<Self, Self::Error> {
         let box_with_zero_id = ErgoBox {
             box_id: BoxId::zero(),
@@ -165,7 +176,7 @@ impl TryFrom<json::ergo_box::ErgoBoxFromJson> for ErgoBox {
         if ergo_box.box_id() == box_json.box_id {
             Ok(ergo_box)
         } else {
-            Err(json::ergo_box::ErgoBoxFromJsonError::InvalidBoxId)
+            Err(ErgoBoxFromJsonError::InvalidBoxId)
         }
     }
 }
@@ -196,7 +207,7 @@ impl SigmaSerializable for ErgoBox {
 
 /// Contains the same fields as `ErgoBox`, except if transaction id and index,
 /// that will be calculated after full transaction formation.
-#[derive(PartialEq, Eq, Debug)]
+#[derive(PartialEq, Eq, Clone, Debug)]
 pub struct ErgoBoxCandidate {
     /// amount of money associated with the box
     pub value: BoxValue,
@@ -260,6 +271,18 @@ impl SigmaSerializable for ErgoBoxCandidate {
     }
 }
 
+impl From<ErgoBox> for ErgoBoxCandidate {
+    fn from(b: ErgoBox) -> Self {
+        ErgoBoxCandidate {
+            value: b.value,
+            ergo_tree: b.ergo_tree,
+            tokens: b.tokens,
+            additional_registers: b.additional_registers,
+            creation_height: b.creation_height,
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

sigma-tree/src/chain/input.rs

@@ -9,16 +9,31 @@ use super::{box_id::BoxId, prover_result::ProverResult};
 use serde::{Deserialize, Serialize};
 
 /// Fully signed transaction input
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Clone)]
 #[cfg_attr(test, derive(proptest_derive::Arbitrary))]
 #[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
 pub struct Input {
     /// id of the box to spent
+    #[cfg_attr(feature = "with-serde", serde(rename = "boxId"))]
     pub box_id: BoxId,
     /// proof of spending correctness
+    #[cfg_attr(feature = "with-serde", serde(rename = "spendingProof"))]
     pub spending_proof: ProverResult,
 }
 
+impl Input {
+    /// input with an empty proof
+    pub fn input_to_sign(&self) -> Input {
+        Input {
+            box_id: self.box_id.clone(),
+            spending_proof: ProverResult {
+                proof: vec![],
+                extension: self.spending_proof.extension.clone(),
+            },
+        }
+    }
+}
+
 impl SigmaSerializable for Input {
     fn sigma_serialize<W: vlq_encode::WriteSigmaVlqExt>(&self, w: &mut W) -> Result<(), io::Error> {
         self.box_id.sigma_serialize(w)?;

sigma-tree/src/chain/json.rs

@@ -44,7 +44,6 @@ pub mod ergo_box {
         ErgoTree,
     };
     use serde::Deserialize;
-    use thiserror::Error;
 
     #[derive(Deserialize, PartialEq, Eq, Debug, Clone)]
     pub struct ErgoBoxFromJson {
@@ -74,17 +73,33 @@ pub mod ergo_box {
         #[serde(rename = "index")]
         pub index: u16,
     }
+}
+
+pub mod transaction {
+    use crate::chain::{data_input::DataInput, ErgoBox, Input, TxId};
+    use serde::{Deserialize, Serialize};
 
-    #[derive(Error, PartialEq, Eq, Debug, Clone)]
-    pub enum ErgoBoxFromJsonError {
-        #[error("Box id parsed from JSON differs from calculated from box serialized bytes")]
-        InvalidBoxId,
+    #[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+    pub struct TransactionJson {
+        #[cfg_attr(feature = "with-serde", serde(rename = "id"))]
+        pub tx_id: TxId,
+        /// inputs, that will be spent by this transaction.
+        #[cfg_attr(feature = "with-serde", serde(rename = "inputs"))]
+        pub inputs: Vec<Input>,
+        /// inputs, that are not going to be spent by transaction, but will be reachable from inputs
+        /// scripts. `dataInputs` scripts will not be executed, thus their scripts costs are not
+        /// included in transaction cost and they do not contain spending proofs.
+        #[cfg_attr(feature = "with-serde", serde(rename = "dataInputs"))]
+        pub data_inputs: Vec<DataInput>,
+        #[cfg_attr(feature = "with-serde", serde(rename = "outputs"))]
+        pub outputs: Vec<ErgoBox>,
     }
 }
 
 #[cfg(test)]
 mod tests {
     use super::super::ergo_box::*;
+    use super::super::transaction::*;
     use super::*;
     use proptest::prelude::*;
     use register::NonMandatoryRegisters;
@@ -99,6 +114,15 @@ mod tests {
             prop_assert_eq![b, b_parsed];
         }
 
+        #[test]
+        fn tx_roundtrip(t in any::<Transaction>()) {
+            let j = serde_json::to_string(&t)?;
+            // dbg!(j);
+            eprintln!("{}", j);
+            let t_parsed: Transaction = serde_json::from_str(&j)?;
+            prop_assert_eq![t, t_parsed];
+        }
+
     }
 
     #[test]

sigma-tree/src/chain/prover_result.rs

@@ -9,7 +9,7 @@ use super::context_extension::ContextExtension;
 use serde::{Deserialize, Serialize};
 
 /// Proof of correctness of tx spending
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 #[cfg_attr(feature = "with-serde", derive(Serialize, Deserialize))]
 pub struct ProverResult {
     /// proof that satisfies final sigma proposition