rpc: protocol version (#575)

* evm: protocol version

* changelog

* version

* fix

* support latest version only

rpc/namespaces/eth/api.go

@@ -17,7 +17,6 @@ import (
 	rpctypes "github.com/cosmos/ethermint/rpc/types"
 	ethermint "github.com/cosmos/ethermint/types"
 	"github.com/cosmos/ethermint/utils"
-	"github.com/cosmos/ethermint/version"
 	evmtypes "github.com/cosmos/ethermint/x/evm/types"
 
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -124,7 +123,7 @@ func (api *PublicEthereumAPI) SetKeys(keys []ethsecp256k1.PrivKey) {
 // ProtocolVersion returns the supported Ethereum protocol version.
 func (api *PublicEthereumAPI) ProtocolVersion() hexutil.Uint {
 	api.logger.Debug("eth_protocolVersion")
-	return hexutil.Uint(version.ProtocolVersion)
+	return hexutil.Uint(ethermint.ProtocolVersion)
 }
 
 // ChainId returns the chain's identifier in hex format

rpc/namespaces/web3/api.go

@@ -1,23 +1,26 @@
 package web3
 
 import (
-	"github.com/cosmos/ethermint/version"
+	"fmt"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/crypto"
+
+	"github.com/cosmos/cosmos-sdk/version"
 )
 
 // PublicWeb3API is the web3_ prefixed set of APIs in the Web3 JSON-RPC spec.
 type PublicWeb3API struct{}
 
-// New creates an instance of the Web3 API.
+// NewAPI creates an instance of the Web3 API.
 func NewAPI() *PublicWeb3API {
 	return &PublicWeb3API{}
 }
 
 // ClientVersion returns the client version in the Web3 user agent format.
 func (PublicWeb3API) ClientVersion() string {
-	return version.ClientVersion()
+	info := version.NewInfo()
+	return fmt.Sprintf("%s-%s", info.Name, info.Version)
 }
 
 // Sha3 returns the keccak-256 hash of the passed-in input.