Added getContractSize api into rpc

internal/quaiapi/quai_api.go

@@ -491,6 +491,24 @@ func (s *PublicBlockChainQuaiAPI) EstimateGas(ctx context.Context, args Transact
 	}
 }
 
+// GetContractSize gives the size of the contract at the block hash or number
+func (s *PublicBlockChainQuaiAPI) GetContractSize(ctx context.Context, address common.AddressBytes, blockNrOrHash rpc.BlockNumberOrHash) (*hexutil.Big, error) {
+	addr := common.Bytes20ToAddress(address, s.b.NodeLocation())
+	if addr.IsInQuaiLedgerScope() {
+		state, _, err := s.b.StateAndHeaderByNumberOrHash(ctx, blockNrOrHash)
+		if state == nil || err != nil {
+			return nil, err
+		}
+		internal, err := addr.InternalAndQuaiAddress()
+		if err != nil {
+			return nil, err
+		}
+		return (*hexutil.Big)(state.GetSize(internal)), state.Error()
+	} else {
+		return nil, errors.New("getContractSize cannot be called on a Qi Address")
+	}
+}
+
 // BaseFee returns the base fee for a tx to be included in the next block.
 // If txType is set to "true" returns the Quai base fee in units of Wei.
 // If txType is set to "false" returns the Qi base fee in units of Qit.

quaiclient/ethclient/ethclient.go

@@ -338,6 +338,12 @@ func (ec *Client) BalanceAt(ctx context.Context, account common.MixedcaseAddress
 	return (*big.Int)(&result), err
 }
 
+func (ec *Client) ContractSizeAt(ctx context.Context, account common.MixedcaseAddress, blockNumber *big.Int) (*big.Int, error) {
+	var result hexutil.Big
+	err := ec.c.CallContext(ctx, &result, "quai_getContractSize", account.Original(), toBlockNumArg(blockNumber))
+	return (*big.Int)(&result), err
+}
+
 func (ec *Client) GetOutpointsByAddress(ctx context.Context, address common.MixedcaseAddress) (map[string]*types.OutpointAndDenomination, error) {
 	var outpoints map[string]*types.OutpointAndDenomination
 	err := ec.c.CallContext(ctx, &outpoints, "quai_getOutpointsByAddress", address.Original())