another stub: cardano value

README.md

@@ -2,6 +2,17 @@
 
 > A first stab at the konduit cli
 
+## Workspace 
+
+- [ ] cardano-tx-builder - Pure cardano transaction builder utils 
+- [ ] cardano-connect - Traits for cardano connector
+- [ ] cardano-connect-blockfrost - Impl for blockfrost
+- [ ] konduit-core - Pure konduit transaction builders.
+    Depends only on cardano-tx-builder.
+    - [ ] test round trip data
+    - [ ] compiles to wasm
+- [ ] konduit-cli - cli wrapping of core
+
 ## TODOs 
 
 - [x] serde for relevant data

src/cardano_types.rs

@@ -9,6 +9,7 @@ use uplc::PlutusData;
 
 pub mod address;
 use address::Address;
+pub mod value;
 
 /// This is a sad file: yet another set of wrapping.
 ///

src/cardano_types/value.rs

@@ -0,0 +1,17 @@
+
+// TODO: Write some sane value handling fuctions: 
+// - add 
+// - sub 
+// - prune
+// - split (negative, positive)
+// - is_positive
+
+use std::collections::HashMap;
+use pallas_crypto::hash::Hash;
+
+/// Naive version of value 
+pub type MultiAsset = HashMap<Hash<28>, HashMap<Vec<u8>, u64>>;
+
+#[derive(Debug)]
+pub struct Value(u64, MultiAsset);
+

src/utils.rs

@@ -1,8 +1,7 @@
 use anyhow::{anyhow, Result};
 
 pub fn v2a<T, const N: usize>(v: Vec<T>) -> Result<[T; N]> {
-    v.try_into()
+    <[T;N]>::try_from(v).map_err(|v: Vec<T>| anyhow!("Expected a Vec of length {}, but got {}", N, v.len()))
-        .map_err(|v: Vec<T>| anyhow!("Expected a Vec of length {}, but got {}", N, v.len()))
 }
 
 pub fn concat<T: Clone>(l: &[T], r: &[T]) -> Vec<T> {