Final mod

src/proofs/mod.rs

@@ -0,0 +1,73 @@
+/// An error type for handling proof-related issues.
+#[derive(Debug)]
+pub struct ProofError {
+    message: String,
+}
+
+impl ProofError {
+    /// Creates a new `ProofError` with a custom message.
+    pub fn new(msg: &str) -> Self {
+        Self {
+            message: msg.to_string(),
+        }
+    }
+}
+
+impl std::fmt::Display for ProofError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.message)
+    }
+}
+
+impl std::error::Error for ProofError {}
+
+/// A custom proof struct for demonstration purposes.
+pub struct MyProof {
+    a: Vec<u8>,
+    b: Vec<u8>,
+}
+
+impl MyProof {
+    /// Constructor for `MyProof`.
+    pub fn new(a: Vec<u8>, b: Vec<u8>) -> Self {
+        Self { a, b }
+    }
+}
+
+/// A trait defining the behavior required for a proof.
+pub trait MyProofTrait {
+    fn verify(&self) -> Result<(), ProofError>;
+    fn serialize(&self) -> Result<Vec<u8>, ProofError>;
+    fn deserialize(data: &[u8]) -> Result<Self, ProofError>
+    where
+        Self: Sized;
+}
+
+impl MyProofTrait for MyProof {
+    fn verify(&self) -> Result<(), ProofError> {
+        // Verification logic (example)
+        println!("Verifying MyProof...");
+        Ok(())
+    }
+
+    fn serialize(&self) -> Result<Vec<u8>, ProofError> {
+        // Example serialization logic
+        let mut serialized = Vec::new();
+        serialized.extend_from_slice(&self.a);
+        serialized.extend_from_slice(&self.b);
+        Ok(serialized)
+    }
+
+    fn deserialize(data: &[u8]) -> Result<Self, ProofError> {
+        // Example deserialization logic
+        if data.len() < 2 {
+            return Err(ProofError::new("Data too short to deserialize"));
+        }
+        let mid = data.len() / 2;
+        let (a, b) = data.split_at(mid);
+        Ok(Self {
+            a: a.to_vec(),
+            b: b.to_vec(),
+        })
+    }
+}

src/transaction/mod.rs

@@ -0,0 +1,116 @@
+/// An error type for handling transaction-related issues.
+#[derive(Debug)]
+pub struct TransactionError {
+    message: String,
+}
+
+impl TransactionError {
+    /// Creates a new `TransactionError` with a custom message.
+    pub fn new(msg: &str) -> Self {
+        Self {
+            message: msg.to_string(),
+        }
+    }
+}
+
+impl std::fmt::Display for TransactionError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.message)
+    }
+}
+
+impl std::error::Error for TransactionError {}
+
+/// A struct representing a transaction input.
+#[derive(Debug, Clone)]
+pub struct Input {
+    pub previous_tx: Vec<u8>, // Reference to a previous transaction
+    pub index: usize,         // Output index in the referenced transaction
+}
+
+/// A struct representing a transaction output.
+#[derive(Debug, Clone)]
+pub struct Output {
+    pub recipient: Vec<u8>, // Address or public key of the recipient
+    pub amount: u64,        // Amount of currency in the output
+}
+
+/// A struct representing a transaction.
+#[derive(Debug, Clone)]
+pub struct Transaction {
+    pub inputs: Vec<Input>,   // List of inputs
+    pub outputs: Vec<Output>, // List of outputs
+}
+
+impl Transaction {
+    /// Creates a new transaction.
+    pub fn new(inputs: Vec<Input>, outputs: Vec<Output>) -> Self {
+        Self { inputs, outputs }
+    }
+
+    /// Verifies that the transaction is valid.
+    pub fn verify(&self) -> Result<(), TransactionError> {
+        // Example verification logic
+        if self.inputs.is_empty() {
+            return Err(TransactionError::new("Transaction must have at least one input"));
+        }
+        if self.outputs.is_empty() {
+            return Err(TransactionError::new("Transaction must have at least one output"));
+        }
+        if self.outputs.iter().any(|output| output.amount == 0) {
+            return Err(TransactionError::new("Output amounts must be greater than zero"));
+        }
+        println!("Transaction is valid!");
+        Ok(())
+    }
+
+    /// Serializes the transaction into a vector of bytes.
+    pub fn serialize(&self) -> Result<Vec<u8>, TransactionError> {
+        let mut serialized = Vec::new();
+        for input in &self.inputs {
+            serialized.extend_from_slice(&input.previous_tx);
+            serialized.extend_from_slice(&input.index.to_le_bytes());
+        }
+        for output in &self.outputs {
+            serialized.extend_from_slice(&output.recipient);
+            serialized.extend_from_slice(&output.amount.to_le_bytes());
+        }
+        Ok(serialized)
+    }
+
+    /// Deserializes a transaction from a vector of bytes.
+    pub fn deserialize(data: &[u8]) -> Result<Self, TransactionError> {
+        let mut offset = 0;
+
+        // Example logic to reconstruct the transaction (input/output sizes are fixed for simplicity)
+        let mut inputs = Vec::new();
+        let mut outputs = Vec::new();
+
+        // Deserialize inputs
+        while offset + 36 <= data.len() {
+            let previous_tx = data[offset..offset + 32].to_vec();
+            offset += 32;
+            let index = u32::from_le_bytes([data[offset], data[offset + 1], data[offset + 2], data[offset + 3]]);
+            offset += 4;
+            inputs.push(Input { previous_tx, index: index.try_into().unwrap() });
+        }
+
+        // Deserialize outputs
+        while offset + 40 <= data.len() {
+            let recipient = data[offset..offset + 32].to_vec();
+            offset += 32;
+            let amount = u64::from_le_bytes([
+                data[offset], data[offset + 1], data[offset + 2], data[offset + 3],
+                data[offset + 4], data[offset + 5], data[offset + 6], data[offset + 7],
+            ]);
+            offset += 8;
+            outputs.push(Output { recipient, amount });
+        }
+
+        if offset != data.len() {
+            return Err(TransactionError::new("Invalid data length"));
+        }
+
+        Ok(Self { inputs, outputs })
+    }
+}