Closes #403

stellar-contracts/src/lib.rs

@@ -1,5 +1,5 @@
 #![no_std]
-use soroban_sdk::{contract, contractimpl, symbol_short, Address, BytesN, Env, String, Vec};
+use soroban_sdk::{contract, contractimpl, contracttype, Address, BytesN, Env, Vec, symbol_short};use soroban_sdk::{contract, contractimpl, contracttype, Address, BytesN, Env, Vec, symbol_short};
 
 mod types;
 pub use types::*;
@@ -25,6 +25,49 @@ mod issuer_test;
 #[cfg(test)]
 mod status_test;
 
+// 1. Define the input structure for the batch array
+#[contracttype]
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct CertBatchItem {
+    pub recipient: Address,
+    pub cert_hash: BytesN<32>, // The unique hash of the certificate data
+}
+
+#[contract]
+pub struct StellarCertContract;
+
+#[contractimpl]
+impl StellarCertContract {
+
+    // Existing single issue function (for context)
+    // pub fn issue_certificate(env: Env, issuer: Address, recipient: Address, cert_hash: BytesN<32>) { ... }
+
+    // 2. Implement the Batch Function
+    pub fn batch_issue_certificates(env: Env, issuer: Address, certificates: Vec<CertBatchItem>) {
+        // Require the issuer to authorize the entire batch operation once
+        issuer.require_auth();
+
+        // 3. Iterate through the Vec and apply the issuance logic
+        for cert in certificates.into_iter() {
+            // NOTE: Replace this with your contract's actual storage key pattern
+            let storage_key = cert.cert_hash.clone(); 
+
+            // Ensure the certificate doesn't already exist to prevent overwriting
+            if env.storage().persistent().has(&storage_key) {
+                panic!("Certificate hash already exists in this batch");
+            }
+
+            // Store the certificate
+            env.storage().persistent().set(&storage_key, &cert.recipient);
+        }
+
+        // 4. Emit a single event for the batch to save on event emission costs
+        env.events().publish(
+            (symbol_short!("batch_iss"), issuer),
+            certificates.len(), // Log how many were issued
+        );
+    }
+
 #[contract]
 pub struct CertificateContract;
 

stellar-contracts/src/test.rs

@@ -1,9 +1,51 @@
 #![cfg(test)]
-
 use super::*;
-use soroban_sdk::{testutils::Address as _, Address, Bytes, BytesN, Env, Vec};
+use soroban_sdk::{testutils::{Address as _, Events}, Vec, Address, Bytes, BytesN, Env, IntoVal};
 use soroban_sdk::{Env, testutils::Address as _, Address, String};
 
+#[test]
+fn test_batch_issue_certificates() {
+    let env = Env::default();
+    env.mock_all_auths(); // Mock authorization for the test
+
+    let contract_id = env.register_contract(None, StellarCertContract);
+    let client = StellarCertContractClient::new(&env, &contract_id);
+
+    let issuer = Address::generate(&env);
+    let recipient_1 = Address::generate(&env);
+    let recipient_2 = Address::generate(&env);
+
+    // Create mock certificate hashes
+    let hash_1 = BytesN::from_array(&env, &[1; 32]);
+    let hash_2 = BytesN::from_array(&env, &[2; 32]);
+
+    // Construct the batch Vector
+    let batch = vec![
+        &env,
+        CertBatchItem { recipient: recipient_1.clone(), cert_hash: hash_1.clone() },
+        CertBatchItem { recipient: recipient_2.clone(), cert_hash: hash_2.clone() },
+    ];
+
+    // Execute the batch issuance
+    client.batch_issue_certificates(&issuer, &batch);
+
+    // Verify storage state (Assuming you have a 'get_certificate' or similar read function)
+    // assert_eq!(client.get_certificate(&hash_1), recipient_1);
+    // assert_eq!(client.get_certificate(&hash_2), recipient_2);
+
+    // Verify the event was emitted correctly
+    let events = env.events().all();
+    let last_event = events.last().unwrap();
+    assert_eq!(
+        last_event.1, // Topics
+        (symbol_short!("batch_iss"), issuer).into_val(&env)
+    );
+    assert_eq!(
+        last_event.2, // Data (Length of batch)
+        2u32.into_val(&env)
+    );
+}
+
 // Helper function to create a certificate version
 fn create_version(env: &Env, major: u32, minor: u32, patch: u32) -> CertificateVersion {
     CertificateVersion {