go: Drop {hash,address}Lenght constants

bindings/go/evmc/evmc.go

@@ -59,10 +59,13 @@ import (
 
 // Static asserts.
 const (
-	_ = uint(hashLength - C.sizeof_evmc_bytes32) // The size of evmc_bytes32 equals the size of Hash.
-	_ = uint(C.sizeof_evmc_bytes32 - hashLength)
-	_ = uint(addressLength - C.sizeof_evmc_address) // The size of evmc_address equals the size of Address.
-	_ = uint(C.sizeof_evmc_address - addressLength)
+	// The size of evmc_bytes32 equals the size of Hash.
+	_ = uint(len(Hash{}) - C.sizeof_evmc_bytes32)
+	_ = uint(C.sizeof_evmc_bytes32 - len(Hash{}))
+
+	// The size of evmc_address equals the size of Address.
+	_ = uint(len(Address{}) - C.sizeof_evmc_address)
+	_ = uint(C.sizeof_evmc_address - len(Address{}))
 )
 
 type Error int32

bindings/go/evmc/types.go

@@ -4,16 +4,8 @@
 
 package evmc
 
-// Lengths of hashes and addresses in bytes.
-const (
-	// hashLength is the expected length of the hash (in bytes)
-	hashLength = 32
-	// addressLength is the expected length of the address (in bytes)
-	addressLength = 20
-)
-
 // Hash represents the 32 bytes of arbitrary data (e.g. the result of Keccak256 hash).
-type Hash [hashLength]byte
+type Hash [32]byte
 
 // Address represents the 20 byte address of an Ethereum account.
-type Address [addressLength]byte
+type Address [20]byte