test consistent packet commitment in cairo and rust

relayer/crates/starknet-integration-tests/src/tests/mod.rs

@@ -1,4 +1,5 @@
 pub mod erc20;
 pub mod ics20;
 pub mod light_client;
+pub mod packet_commitment;
 pub mod update_clients;

relayer/crates/starknet-integration-tests/src/tests/packet_commitment.rs

@@ -0,0 +1,38 @@
+use ibc::core::channel::types::commitment::compute_packet_commitment;
+use ibc::core::channel::types::timeout::{TimeoutHeight, TimeoutTimestamp};
+use ibc::core::client::types::Height;
+use ibc::primitives::Timestamp;
+
+#[test]
+fn test_cairo_packet_commitment() {
+    // https://github.com/informalsystems/ibc-starknet/blob/7967c8045ed6b4453030e01d0df12c47c2d77b37/cairo-contracts/packages/apps/src/transfer/types.cairo#L307
+    // https://github.com/informalsystems/ibc-starknet/blob/7967c8045ed6b4453030e01d0df12c47c2d77b37/cairo-contracts/packages/core/src/tests/commitment.cairo#L52-L58
+
+    let timeout_height = TimeoutHeight::At(Height::new(0, 1000).expect("valid height"));
+    let timeout_timestamp = TimeoutTimestamp::At(Timestamp::from_nanoseconds(1000 * 1_000_000_000));
+
+    let packet_json_data: &str =
+            "{\"denom\":\"2087021424722619777119509474943472645767659996348769578120564519014510906823\",\"amount\":\"100\",\"sender\":\"1431520594\",\"receiver\":\"cosmos1wxeyh7zgn4tctjzs0vtqpc6p5cxq5t2muzl7ng\",\"memo\":\"\"}";
+
+    let expected: Vec<u32> = [
+        3458244073, 1576048754, 4210798310, 1002247062, 2365181318, 2763927782, 545147151,
+        944653547,
+    ]
+    .to_vec();
+
+    let actual = compute_packet_commitment(
+        packet_json_data.as_ref(),
+        &timeout_height,
+        &timeout_timestamp,
+    )
+    .into_vec()
+    .chunks(4)
+    .map(|chunk| {
+        let mut bytes = [0u8; 4];
+        bytes.copy_from_slice(&chunk);
+        u32::from_be_bytes(bytes)
+    })
+    .collect::<Vec<_>>();
+
+    assert_eq!(expected, actual);
+}