update relayer client (#315)

Author: pkieltyka

lib/mock/relayer.mock.go

@@ -130,10 +130,10 @@ func (h Hash) IsEmpty() bool {
 	return h == ""
 }
 
-// IsNativeAssetAddress checks if the hash value is the ERC-7528
+// IsEtherNativeTokenAddress checks if the hash value is the ERC-7528
 // native token address represented as a contract address.
 // see https://eips.ethereum.org/EIPS/eip-7528
-func (h Hash) IsNativeAssetAddress() bool {
+func (h Hash) IsEtherNativeTokenAddress() bool {
 	return h == "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE" ||
 		h == "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"
 }

lib/prototyp/hash.go

@@ -1 +1,12 @@
 package prototyp
+
+// EtherNativeTokenAddress represents ETH as an erc20 token address
+// according to https://eips.ethereum.org/EIPS/eip-7528
+//
+// NOTE: throughout sequence we actually use 0x0000000000000000000000000000000000000000
+// as the address to represent a native token, so just be mindful when using
+// both. We will evolve to treat both as native ETH.
+const EtherNativeTokenAddress = Hash("0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee")
+
+// ZeroAddress is the canonical zero address.
+const ZeroAddress = Hash("0x0000000000000000000000000000000000000000")