Allow high s in eth lock

checksums.txt

@@ -1,3 +1,3 @@
 3d659b15f2aad5f9350f55ce471806c6d6ad4f51a555a82b7918e9d88f84f04a  build/release/ccc-btc-lock
-4ae08bd7ed954997dcbca5ff88700bf7f949b1080c2bd1cb024f15c8b0436396  build/release/ccc-eth-lock
+a1744f76c77b3ec3f780db12c77b5dab024d3878e8ccc0bcde266e300c3c8de5  build/release/ccc-eth-lock
 66bbb7041a10a0b2a2fd51ae2aa9394e9f7ee6e8b2b32dd5d3e4d37c0d4a64b8  build/release/ccc-sol-lock

contracts/ccc-eth-lock/src/entry.rs

@@ -69,9 +69,6 @@ pub fn entry() -> Result<(), Error> {
     }
     let rec_id = RecoveryId::try_from(rec_id).map_err(|_| Error::InvalidRecoverId)?;
     let sig = Signature::from_slice(&sig_raw[..64]).map_err(|_| Error::WrongSignatureFormat)?;
-    if sig.normalize_s().is_some() {
-        return Err(Error::SignatureIsNotLowS);
-    }
     let pubkey_result = &recover_from_prehash(&digest_hash, &sig, rec_id)
         .map_err(|_| Error::CanNotRecover)?
         .to_encoded_point(false)

contracts/ccc-eth-lock/src/error.rs

@@ -14,7 +14,6 @@ pub enum Error {
     WrongSignatureFormat,
     InvalidRecoverId,
     CanNotRecover,
-    SignatureIsNotLowS,
 }
 
 impl From<HelperError> for Error {

tests/src/test_eth.rs

@@ -191,7 +191,7 @@ fn test_failure_recid() {
 }
 
 #[test]
-fn test_failure_sig_use_high_s() {
+fn test_success_sig_use_high_s() {
     let mut dl = Resource::default();
     let mut px = Pickaxer::default();
     let tx = default_tx(&mut dl, &mut px);
@@ -201,13 +201,14 @@ fn test_failure_sig_use_high_s() {
     let l_s = k256::NonZeroScalar::try_from(&wa_lock[32..64]).unwrap();
     let h_s = -l_s;
     wa_lock[32..64].copy_from_slice(&h_s.to_bytes().as_slice());
+    wa_lock[64] = 55 - wa_lock[64];
     let wa = wa.as_builder().lock(Some(ckb_types::bytes::Bytes::from(wa_lock)).pack()).build();
     let tx = tx.as_advanced_builder().set_witnesses(vec![wa.as_bytes().pack()]).build();
 
     let tx_resolved =
         ckb_types::core::cell::resolve_transaction(tx, &mut std::collections::HashSet::new(), &dl, &dl).unwrap();
     let verifier = Verifier::default();
-    assert_script_error(verifier.verify(&tx_resolved, &dl).unwrap_err(), 37);
+    verifier.verify(&tx_resolved, &dl).unwrap();
 }
 
 #[test]