feat: move input from json to helper method

crates/cli/src/args.rs

@@ -20,16 +20,21 @@ pub enum Args {
 pub enum TxCommand {
     /// Simulate a transaction by evaluating it's script
     Simulate {
+        /// A file containing cbor hex
         input: PathBuf,
+
+        /// Toggle whether input is raw cbor or a hex string
         #[clap(short, long)]
         cbor: bool,
+
+        /// Json file containing resolved inputs
         #[clap(short, long)]
         resolved_inputs: PathBuf,
         #[clap(short, long)]
         slot_length: u64,
-        #[clap(short, long)]
+        #[clap(long)]
         zero_time: u64,
-        #[clap(short, long)]
+        #[clap(long)]
         zero_slot: u64,
     },
 }

crates/cli/src/main.rs

@@ -1,8 +1,4 @@
-use std::{
-    fmt::Write as _,
-    fs::{self, File},
-    io::BufReader,
-};
+use std::{fmt::Write as _, fs};
 
 use pallas_traverse::{Era, MultiEraTx};
 use uplc::{
@@ -46,9 +42,7 @@ fn main() -> anyhow::Result<()> {
                 println!("Simulating: {}", tx.hash());
 
                 if let Some(tx_babbage) = tx.as_babbage() {
-                    let file = File::open(&resolved_inputs)?;
-                    let reader = BufReader::new(file);
-                    let resolved_inputs: Vec<ResolvedInput> = serde_json::from_reader(reader)?;
+                    let resolved_inputs = ResolvedInput::from_json(&resolved_inputs)?;
 
                     let slot_config = SlotConfig {
                         zero_time,

crates/uplc/src/tx/eval.rs

@@ -1,5 +1,5 @@
 use crate::{
-    ast::{DeBruijn, FakeNamedDeBruijn, NamedDeBruijn, Program},
+    ast::{FakeNamedDeBruijn, NamedDeBruijn, Program},
     machine::cost_model::ExBudget,
     PlutusData,
 };

crates/uplc/src/tx/script_context.rs

@@ -1,3 +1,5 @@
+use std::{fs::File, io::BufReader, path::PathBuf};
+
 use pallas_codec::utils::KeyValuePairs;
 use pallas_crypto::hash::Hash;
 use pallas_primitives::babbage::{
@@ -14,6 +16,26 @@ pub struct ResolvedInput {
     pub output: TransactionOutput,
 }
 
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("{0}")]
+    File(#[from] std::io::Error),
+    #[error("{0}")]
+    Serde(#[from] serde_json::error::Error),
+}
+
+impl ResolvedInput {
+    pub fn from_json(file: &PathBuf) -> Result<Vec<Self>, Error> {
+        let file = File::open(file)?;
+
+        let reader = BufReader::new(file);
+
+        let resolved_inputs: Vec<ResolvedInput> = serde_json::from_reader(reader)?;
+
+        Ok(resolved_inputs)
+    }
+}
+
 #[derive(Debug, PartialEq, Clone)]
 pub struct TxInInfo {
     pub out_ref: TransactionInput,

crates/uplc/src/tx/to_plutus_data.rs

@@ -43,7 +43,7 @@ pub trait ToPlutusData {
     fn to_plutus_data(&self) -> PlutusData;
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone)]
 pub struct MintValue {
     pub mint_value: Mint,
 }