feat: encode plutus data

crates/uplc/Cargo.toml

@@ -16,6 +16,7 @@ exclude = ["test_data/*"]
 flat-rs = { path = "../flat", version = "0.0.6" }
 hex = "0.4.3"
 minicbor = { version = "0.18.0", features = ["std"] }
+pallas-primitives = "0.12.0"
 peg = "0.8.0"
 pretty = "0.11.3"
 thiserror = "1.0.31"

crates/uplc/src/ast.rs

@@ -1,5 +1,7 @@
 use std::fmt::Display;
 
+use pallas_primitives::alonzo::PlutusData;
+
 use crate::{
     builtins::DefaultFunction,
     debruijn::{self, Converter},
@@ -109,7 +111,7 @@ pub enum Constant {
     // tag: 7
     // Apply(Box<Constant>, Type),
     // tag: 8
-    Data(Data),
+    Data(PlutusData),
 }
 
 #[derive(Debug, Clone, PartialEq)]
@@ -139,15 +141,6 @@ impl Display for Type {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
-pub enum Data {
-    Constr(isize, Vec<Data>),
-    Map(Vec<(Data, Data)>),
-    List(Vec<Data>),
-    I(isize),
-    B(Vec<u8>),
-}
-
 /// A Name containing it's parsed textual representation
 /// and a unique id from string interning. The Name's text is
 /// interned during parsing.

crates/uplc/src/flat.rs

@@ -5,6 +5,7 @@ use flat_rs::{
     en::{self, Encode, Encoder},
     Flat,
 };
+use pallas_primitives::Fragment;
 
 use crate::{
     ast::{
@@ -78,6 +79,7 @@ where
     fn decode(d: &mut Decoder) -> Result<Self, de::Error> {
         let version = (usize::decode(d)?, usize::decode(d)?, usize::decode(d)?);
         let term = Term::decode(d)?;
+
         Ok(Program { version, term })
     }
 }
@@ -163,15 +165,15 @@ where
     }
 }
 
+/// Integers are typically smaller so we save space
+/// by encoding them in 7 bits and this allows it to be byte alignment agnostic.
+/// Strings and bytestrings span multiple bytes so using bytestring is
+/// the most effective encoding.
+/// i.e. A 17 or greater length byte array loses efficiency being encoded as
+/// a unsigned integer instead of a byte array
 impl Encode for Constant {
     fn encode(&self, e: &mut Encoder) -> Result<(), en::Error> {
         match self {
-            // Integers are typically smaller so we save space
-            // by encoding them in 7 bits and this allows it to be byte alignment agnostic.
-            // Strings and bytestrings span multiple bytes so using bytestring is
-            // the most effective encoding.
-            // i.e. A 17 or greater length byte array loses efficiency being encoded as
-            // a unsigned integer instead of a byte array
             Constant::Integer(i) => {
                 encode_constant(&[0], e)?;
                 i.encode(e)?;
@@ -210,9 +212,14 @@ impl Encode for Constant {
                 encode_constant_value(a, e)?;
                 encode_constant_value(b, e)?;
             }
-            Constant::Data(_) => {
+            Constant::Data(data) => {
                 encode_constant(&[8], e)?;
-                todo!()
+
+                let cbor = data
+                    .encode_fragment()
+                    .map_err(|err| en::Error::Message(err.to_string()))?;
+
+                cbor.encode(e)?;
             }
         }