fix: ENS parsing requires chainID if an ENS address is expected to be requested/decoded - we do not assume that client is using Ethereum Mainnet!

According to EIP-681: chain_id is optional and contains the decimal chain ID, such that transactions on various test- and private networks can be requested. If no chain_id is present, the client's current network setting remains effective.
In our case if no chainID is present we cannot validate ENS address and will not attempt to guess the network.

Author: JeneaVranceanu

Sources/web3swift/Utils/EIP/EIP681.swift

@@ -348,7 +348,7 @@ extension Web3 {
 
         private static func parseFunctionArgument(_ inputType: ABI.Element.ParameterType,
                                                   _ rawValue: String,
-                                                  chainID: BigUInt? = Networks.Mainnet.chainID,
+                                                  chainID: BigUInt?,
                                                   inputNumber: Int) async -> FunctionArgument? {
             var nativeValue: Any?
             switch inputType {
@@ -358,8 +358,9 @@ extension Web3 {
                 case .ethereumAddress(let ethereumAddress):
                     nativeValue = ethereumAddress
                 case .ensAddress(let ens):
+                    guard let chainID = chainID else { return nil }
                     do {
-                        let web = await Web3(provider: InfuraProvider(chainID == nil ? .Mainnet : .fromInt(UInt(chainID!)))!)
+                        let web = await Web3(provider: InfuraProvider(.fromInt(UInt(chainID)))!)
                         let ensModel = ENS(web3: web)
                         try await ensModel?.setENSResolver(withDomain: ens)
                         let address = try await ensModel?.getAddress(forNode: ens)

Tests/web3swiftTests/localTests/EIP681Tests.swift

@@ -83,7 +83,7 @@ class EIP681Tests: XCTestCase {
 
     func testENSParsing() async throws {
         let testAddress = "somename.eth"
-        let eip681Code = await Web3.EIP681CodeParser.parse("ethereum:\(testAddress)/transfer?address=somename.eth&uint256=1")
+        let eip681Code = await Web3.EIP681CodeParser.parse("ethereum:\(testAddress)@1/transfer?address=somename.eth&uint256=1")
         XCTAssert(eip681Code != nil)
         guard let eip681Code = eip681Code else { return }
         switch eip681Code.targetAddress {
@@ -110,7 +110,7 @@ class EIP681Tests: XCTestCase {
 
     func testENSParsingWithEncoding() async throws {
         let testAddress = "somename.eth"
-        let eip681Code = await Web3.EIP681CodeParser.parse("ethereum:\(testAddress)/transfer?address=somename.eth&uint256=1".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)
+        let eip681Code = await Web3.EIP681CodeParser.parse("ethereum:\(testAddress)@1/transfer?address=somename.eth&uint256=1".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)
         XCTAssert(eip681Code != nil)
         guard let eip681Code = eip681Code else { return }
         switch eip681Code.targetAddress {