[#14] Use lower case in first letter of contract methods

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/invoke/balance.go

@@ -26,7 +26,7 @@ type (
 
 const (
 	transferXMethod = "transferX"
-	lockMethod      = "Lock"
+	lockMethod      = "lock"
 )
 
 // TransferBalanceX invokes transferX method.

pkg/innerring/invoke/neofs.go

@@ -28,8 +28,8 @@ const (
 	// execution stage. Otherwise invocation will fail due to gas limit.
 	extraFee = 5000_0000 // 0.5 Fixed8 gas
 
-	checkIsInnerRingMethod = "IsInnerRing"
-	chequeMethod           = "Cheque"
+	checkIsInnerRingMethod = "isInnerRing"
+	chequeMethod           = "cheque"
 )
 
 // IsInnerRing returns true if 'key' is presented in inner ring list.

pkg/innerring/invoke/netmap.go

@@ -6,8 +6,8 @@ import (
 )
 
 const (
-	getEpochMethod    = "Epoch"
-	setNewEpochMethod = "NewEpoch"
+	getEpochMethod    = "epoch"
+	setNewEpochMethod = "newEpoch"
 )
 
 // Epoch return epoch value from contract.