diff --git a/contracts/contracts/coordination/Coordinator.sol b/contracts/contracts/coordination/Coordinator.sol
index 1856ceec..895eb636 100644
--- a/contracts/contracts/coordination/Coordinator.sol
+++ b/contracts/contracts/coordination/Coordinator.sol
@@ -30,7 +30,7 @@ contract Coordinator is AccessControlDefaultAdminRules {
     event TimeoutChanged(uint32 oldTimeout, uint32 newTimeout);
     event MaxDkgSizeChanged(uint16 oldSize, uint16 newSize);
 
-    event ParticipantPublicKeySet(address indexed participant, BLS12381.G1Point publicKey);
+    event ParticipantPublicKeySet(uint32 indexed ritualId, address indexed participant, BLS12381.G2Point publicKey);
 
     enum RitualState {
         NON_INITIATED,
@@ -64,8 +64,8 @@ contract Coordinator is AccessControlDefaultAdminRules {
     }
 
     struct ParticipantKey {
-        uint32 ritualId;
-        BLS12381.G1Point publicKey;
+        uint32 lastRitualId;
+        BLS12381.G2Point publicKey;
     }
 
     using SafeERC20 for IERC20;
@@ -133,21 +133,21 @@ contract Coordinator is AccessControlDefaultAdminRules {
         _setRoleAdmin(INITIATOR_ROLE, bytes32(0));
     }
 
-    function setProviderPublicKey(BLS12381.G1Point calldata _publicKey) public {
+    function setProviderPublicKey(BLS12381.G2Point calldata _publicKey) public {
         uint32 lastRitualId = uint32(rituals.length);
         address provider = application.stakingProviderFromOperator(msg.sender);
 
         ParticipantKey memory newRecord = ParticipantKey(lastRitualId, _publicKey);
         keysHistory[provider].push(newRecord);
 
-        emit ParticipantPublicKeySet(provider, _publicKey);
+        emit ParticipantPublicKeySet(lastRitualId, provider, _publicKey);
     }
 
-    function getProviderPublicKey(address _address, uint _ritualId) public view returns (BLS12381.G1Point memory) {
-        ParticipantKey[] storage participantHistory = keysHistory[_address];
+    function getProviderPublicKey(address _provider, uint _ritualId) external view returns (BLS12381.G2Point memory) {
+        ParticipantKey[] storage participantHistory = keysHistory[_provider];
 
         for (uint i = participantHistory.length - 1; i >= 0; i--) {
-            if (participantHistory[i].ritualId <= _ritualId) {
+            if (participantHistory[i].lastRitualId <= _ritualId) {
                 return participantHistory[i].publicKey;
             }
         }
@@ -275,7 +275,7 @@ contract Coordinator is AccessControlDefaultAdminRules {
     function postAggregation(
         uint32 ritualId,
         bytes calldata aggregatedTranscript,
-        BLS12381.G1Point calldata publicKey,
+        BLS12381.G1Point calldata dkgPublicKey,
         bytes calldata decryptionRequestStaticKey
     ) external {
         uint256 initialGasLeft = gasleft();
@@ -316,9 +316,9 @@ contract Coordinator is AccessControlDefaultAdminRules {
 
         if (ritual.aggregatedTranscript.length == 0) {
             ritual.aggregatedTranscript = aggregatedTranscript;
-            ritual.publicKey = publicKey;
+            ritual.publicKey = dkgPublicKey;
         } else if (
-            !BLS12381.eqG1Point(ritual.publicKey, publicKey) ||
+            !BLS12381.eqG1Point(ritual.publicKey, dkgPublicKey) ||
         keccak256(ritual.aggregatedTranscript) != aggregatedTranscriptDigest
         ) {
             ritual.aggregationMismatch = true;
diff --git a/tests/test_coordinator.py b/tests/test_coordinator.py
index 3fa4adcd..9ce4cbac 100644
--- a/tests/test_coordinator.py
+++ b/tests/test_coordinator.py
@@ -31,6 +31,10 @@ def transcript_size(shares, threshold):
     return int(424 + 240 * (shares / 2) + 50 * (threshold))
 
 
+def gen_public_key():
+    return (os.urandom(32), os.urandom(32), os.urandom(32))
+
+
 @pytest.fixture(scope="module")
 def nodes(accounts):
     return sorted(accounts[:MAX_DKG_SIZE], key=lambda x: x.address.lower())
@@ -110,7 +114,7 @@ def test_invalid_initiate_ritual(coordinator, nodes, accounts, initiator):
         coordinator.initiateRitual(nodes, initiator, DURATION, sender=initiator)
 
     for node in nodes:
-        public_key = (os.urandom(32), os.urandom(16))
+        public_key = gen_public_key()
         coordinator.setProviderPublicKey(public_key, sender=node)
     with ape.reverts("Providers must be sorted"):
         coordinator.initiateRitual(nodes[1:] + [nodes[0]], initiator, DURATION, sender=initiator)
@@ -122,7 +126,7 @@ def test_invalid_initiate_ritual(coordinator, nodes, accounts, initiator):
 
 def initiate_ritual(coordinator, erc20, flat_rate_fee_model, initiator, nodes):
     for node in nodes:
-        public_key = (os.urandom(32), os.urandom(16))
+        public_key = gen_public_key()
         coordinator.setProviderPublicKey(public_key, sender=node)
     cost = flat_rate_fee_model.getRitualInitiationCost(nodes, DURATION)
     erc20.approve(coordinator.address, cost, sender=initiator)
@@ -143,9 +147,9 @@ def test_initiate_ritual(coordinator, nodes, initiator, erc20, flat_rate_fee_mod
     assert coordinator.getRitualState(0) == RitualState.AWAITING_TRANSCRIPTS
 
 
-def test_test_provider_public_key(coordinator, nodes):
+def test_provider_public_key(coordinator, nodes):
     selected_provider = nodes[0]
-    public_key = (os.urandom(32), os.urandom(16))
+    public_key = gen_public_key()
     tx = coordinator.setProviderPublicKey(public_key, sender=selected_provider)
     ritual_id = coordinator.numberOfRituals()
 
@@ -220,11 +224,11 @@ def test_post_aggregation(coordinator, nodes, initiator, erc20, flat_rate_fee_mo
 
     aggregated = transcript  # has the same size as transcript
     decryption_request_static_keys = [os.urandom(42) for _ in nodes]
-    public_key = (os.urandom(32), os.urandom(16))
+    dkg_public_key = (os.urandom(32), os.urandom(16))
     for i, node in enumerate(nodes):
         assert coordinator.getRitualState(0) == RitualState.AWAITING_AGGREGATIONS
         tx = coordinator.postAggregation(
-            0, aggregated, public_key, decryption_request_static_keys[i], sender=node
+            0, aggregated, dkg_public_key, decryption_request_static_keys[i], sender=node
         )
 
         events = list(coordinator.AggregationPosted.from_receipt(tx))