feat: fee market module (#491)

* feat: fee market module

* update proto

* queriers: CLI + gRPC

* gov params

* genesis

* enable height

* fixes

* fix app

proto/ethermint/evm/v1/evm.proto

@@ -26,8 +26,6 @@ message Params {
     (gogoproto.moretags) = "yaml:\"chain_config\"",
     (gogoproto.nullable) = false
   ];
-  // no base fee forces the EIP-1559 base fee to 0 (needed for 0 price calls)
-  bool no_base_fee = 6 [ (gogoproto.moretags) = "yaml:\"no_base_fee\"" ];
 }
 
 // ChainConfig defines the Ethereum ChainConfig parameters using *sdk.Int values

proto/ethermint/evm/v1/query.proto

@@ -67,12 +67,7 @@ service Query {
   rpc Params(QueryParamsRequest) returns (QueryParamsResponse) {
     option (google.api.http).get = "/ethermint/evm/v1/params";
   }
-
-  // BaseFee queries the base fee of the parent block of the current block.
-  rpc BaseFee(QueryBaseFeeRequest) returns (QueryBaseFeeResponse) {
-    option (google.api.http).get = "/ethermint/evm/v1/base_fee";
-  }
-
+  
   // EthCall implements the `eth_call` rpc api
   rpc EthCall(EthCallRequest) returns (MsgEthereumTxResponse) {
     option (google.api.http).get = "/ethermint/evm/v1/eth_call";

proto/ethermint/feemarket/v1/feemarket.proto

@@ -0,0 +1,20 @@
+syntax = "proto3";
+package ethermint.feemarket.v1;
+
+import "gogoproto/gogo.proto";
+
+option go_package = "github.com/tharsis/ethermint/x/feemarket/types";
+
+// Params defines the EVM module parameters
+message Params {
+  // no base fee forces the EIP-1559 base fee to 0 (needed for 0 price calls)
+  bool no_base_fee = 1;
+  // base fee change denominator bounds the amount the base fee can change between blocks.
+  uint32 base_fee_change_denominator = 2;
+  // elasticity multiplier bounds the maximum gas limit an EIP-1559 block may have.
+  uint32 elasticity_multiplier = 3;
+  // initial base fee for EIP-1559 blocks.
+  int64 initial_base_fee = 4;
+  // height at which the base fee calculation is enabled.
+  int64 enable_height = 5;
+}

proto/ethermint/feemarket/v1/genesis.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+package ethermint.feemarket.v1;
+
+import "gogoproto/gogo.proto";
+import "ethermint/feemarket/v1/feemarket.proto";
+
+option go_package = "github.com/tharsis/ethermint/x/feemarket/types";
+
+// GenesisState defines the feemarket module's genesis state.
+message GenesisState {
+  // params defines all the paramaters of the module.
+  Params params = 1 [(gogoproto.nullable) = false];
+  // base fee is the exported value from previous software version.
+  // Zero by default.
+  string base_fee = 2 [
+    (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Int",
+    (gogoproto.nullable) = false
+  ];
+  // block gas is the amount of gas used on the last block before the upgrade.
+  // Zero by default.
+  uint64 block_gas = 3;
+}

proto/ethermint/feemarket/v1/query.proto

@@ -0,0 +1,58 @@
+syntax = "proto3";
+package ethermint.feemarket.v1;
+
+import "gogoproto/gogo.proto";
+// import "cosmos/base/query/v1beta1/pagination.proto";
+import "google/api/annotations.proto";
+import "ethermint/feemarket/v1/feemarket.proto";
+
+option go_package = "github.com/tharsis/ethermint/x/feemarket/types";
+
+// Query defines the gRPC querier service.
+service Query {
+  // Params queries the parameters of x/feemarket module.
+  rpc Params(QueryParamsRequest) returns (QueryParamsResponse) {
+    option (google.api.http).get = "/feemarket/evm/v1/params";
+  }
+  
+  // BaseFee queries the base fee of the parent block of the current block.
+  rpc BaseFee(QueryBaseFeeRequest) returns (QueryBaseFeeResponse) {
+    option (google.api.http).get = "/feemarket/evm/v1/base_fee";
+  }
+
+  // BlockGas queries the gas used at a given block height
+  rpc BlockGas(QueryBlockGasRequest) returns (QueryBlockGasResponse) {
+    option (google.api.http).get = "/feemarket/evm/v1/block_gas";
+  }
+}
+
+// QueryParamsRequest defines the request type for querying x/evm parameters.
+message QueryParamsRequest {}
+
+// QueryParamsResponse defines the response type for querying x/evm parameters.
+message QueryParamsResponse {
+  // params define the evm module parameters.
+  Params params = 1 [ (gogoproto.nullable) = false ];
+}
+
+// QueryBaseFeeRequest defines the request type for querying the EIP1559 base
+// fee.
+message QueryBaseFeeRequest {}
+
+// BaseFeeResponse returns the EIP1559 base fee.
+message QueryBaseFeeResponse {
+  string base_fee = 1 [
+    (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Int",
+    (gogoproto.nullable) = false
+  ];
+}
+
+// QueryBlockGasRequest defines the request type for querying the EIP1559 base
+// fee.
+message QueryBlockGasRequest {}
+
+
+// QueryBlockGasResponse returns block gas used for a given height.
+message QueryBlockGasResponse {
+  int64 gas = 1;
+}