feat: full gravity multichain support (#1189)

# Related Github tickets

- VolumeFi#1636
- VolumeFi#842
- VolumeFi#1378
- VolumeFi#1617

# Background

This change addresses quite a lot of ongoing issues on the gravity
project, and the merge will result in a fully functional bridge
implementation across multiple chains and tokens, with full support for
funds exchange.

Rollout will require an updated version of compass with this change
VolumeFi/paloma-compass-evm@95b856d

# Testing completed

- [x] test coverage exists or has been added/updated
- [x] tested in a private testnet

# Breaking changes

- [x] I have checked my code for breaking changes
- [x] If there are breaking changes, there is a supporting migration.

---------

Co-authored-by: Luis Carvalho <[email protected]>
Co-authored-by: Taariq Lewis <[email protected]>

proto/palomachain/paloma/gravity/msgs.proto

@@ -89,6 +89,7 @@ message MsgSendToPalomaClaim {
   string chain_reference_id = 8;
   palomachain.paloma.valset.MsgMetadata metadata = 9
       [ (gogoproto.nullable) = false ];
+  uint64 gravity_nonce = 10;
 }
 
 message MsgSendToPalomaClaimResponse {}
@@ -105,6 +106,7 @@ message MsgBatchSendToEthClaim {
   string orchestrator = 6;
   palomachain.paloma.valset.MsgMetadata metadata = 7
       [ (gogoproto.nullable) = false ];
+  uint64 gravity_nonce = 8;
 }
 
 message MsgBatchSendToEthClaimResponse {}
@@ -203,4 +205,4 @@ message MsgUpdateParams {
 
 // MsgUpdateParamsResponse defines the response structure for executing a
 // MsgUpdateParams message.
-message MsgUpdateParamsResponse {}
+message MsgUpdateParamsResponse {}

proto/palomachain/paloma/gravity/query.proto

@@ -18,10 +18,12 @@ service Query {
   rpc Params(QueryParamsRequest) returns (QueryParamsResponse) {}
   rpc LastPendingBatchRequestByAddr(QueryLastPendingBatchRequestByAddrRequest)
       returns (QueryLastPendingBatchRequestByAddrResponse) {}
-  rpc LastEventNonce(QueryLastEventNonceRequest)
-      returns (QueryLastEventNonceResponse) {}
-  rpc LastEventNonceByAddr(QueryLastEventNonceByAddrRequest)
-      returns (QueryLastEventNonceResponse) {}
+  rpc LastObservedGravityNonce(QueryLastObservedGravityNonceRequest)
+      returns (QueryLastObservedGravityNonceResponse) {}
+  rpc LastObservedGravityNonceByAddr(QueryLastObservedGravityNonceByAddrRequest)
+      returns (QueryLastObservedGravityNonceResponse) {}
+  rpc LastObservedGravityBlock(QueryLastObservedGravityBlockRequest)
+      returns (QueryLastObservedGravityBlockResponse) {}
   rpc OutgoingTxBatches(QueryOutgoingTxBatchesRequest)
       returns (QueryOutgoingTxBatchesResponse) {}
   rpc BatchRequestByNonce(QueryBatchRequestByNonceRequest)
@@ -32,10 +34,6 @@ service Query {
       returns (QueryERC20ToDenomResponse) {}
   rpc DenomToERC20(QueryDenomToERC20Request)
       returns (QueryDenomToERC20Response) {}
-  rpc GetLastObservedEthBlock(QueryLastObservedEthBlockRequest)
-      returns (QueryLastObservedEthBlockResponse) {}
-  rpc GetLastObservedEthNonce(QueryLastObservedEthNonceRequest)
-      returns (QueryLastObservedEthNonceResponse) {}
   rpc GetAttestations(QueryAttestationsRequest)
       returns (QueryAttestationsResponse) {}
 
@@ -80,14 +78,19 @@ message QueryBatchConfirmsResponse {
   repeated MsgConfirmBatch confirms = 1 [ (gogoproto.nullable) = false ];
 }
 
-message QueryLastEventNonceRequest { 
+message QueryLastObservedGravityNonceRequest { 
   string chain_reference_id = 1;
 }
-message QueryLastEventNonceByAddrRequest { 
+message QueryLastObservedGravityNonceByAddrRequest { 
   string address = 1; 
   string chain_reference_id = 2;
 }
-message QueryLastEventNonceResponse { uint64 event_nonce = 1; }
+message QueryLastObservedGravityNonceResponse { uint64 nonce = 1; }
+
+message QueryLastObservedGravityBlockRequest { 
+  string chain_reference_id = 1;
+}
+message QueryLastObservedGravityBlockResponse { uint64 block = 1; }
 
 message QueryERC20ToDenomRequest {
   string erc20 = 1;
@@ -101,38 +104,6 @@ message QueryDenomToERC20Request {
 }
 message QueryDenomToERC20Response { string erc20 = 1; }
 
-// QueryLastObservedEthBlockRequest defines the request for getting the height
-// of the last applied Ethereum Event on the bridge. This is expected to lag the
-// actual Ethereum block height significantly due to 1. Ethereum Finality and
-//  2. Consensus mirroring the state on Ethereum
-message QueryLastObservedEthBlockRequest {
-  reserved 1;
-  reserved "use_v1_key";
-
-  string chain_reference_id = 2;
-}
-message QueryLastObservedEthBlockResponse {
-  // a response of 0 indicates that no Ethereum events have been observed, and
-  // thus the bridge is inactive
-  uint64 block = 1;
-}
-
-// QueryLastObservedEthNonceRequest defines the request for getting the event
-// nonce of the last applied Ethereum Event on the bridge. Note that this is
-// likely to lag the last executed event a little due to 1. Ethereum Finality
-// and 2. Consensus mirroring the Ethereum state
-message QueryLastObservedEthNonceRequest {
-  reserved 1;
-  reserved "use_v1_key";
-
-  string chain_reference_id = 2;
-}
-message QueryLastObservedEthNonceResponse {
-  // a response of 0 indicates that no Ethereum events have been observed, and
-  // thus the bridge is inactive
-  uint64 nonce = 1;
-}
-
 // QueryAttestationsRequest defines the request structure for getting recent
 // attestations with optional query parameters. By default, a limited set of
 // recent attestations will be returned, defined by 'limit'. These attestations