fix: ISO8601 didn't support fractional seconds by default

Author: JeneaVranceanu

Sources/web3swift/Utils/EIP/EIP4361.swift

@@ -68,7 +68,7 @@ public final class EIP4361 {
         let eip4361Regex = try! NSRegularExpression(pattern: EIP4361.eip4361Pattern)
         let groups = eip4361Regex.captureGroups(string: message)
         let dateFormatter = ISO8601DateFormatter()
-
+        dateFormatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
         guard let domain = groups["domain"],
               let rawAddress = groups["address"],
               let address = EthereumAddress(rawAddress),
@@ -115,6 +115,7 @@ public final class EIP4361 {
         descriptionParts.append("\nChain ID: \(chainId.description)")
         descriptionParts.append("\nNonce: \(nonce)")
         let dateFormatter = ISO8601DateFormatter()
+        dateFormatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
         descriptionParts.append("\nIssued At: \(dateFormatter.string(from: issuedAt))")
         if let expirationTime = expirationTime {
             descriptionParts.append("\nExpiration Time: \(dateFormatter.string(from: expirationTime))")

Tests/web3swiftTests/localTests/EIP4361Test.swift

@@ -14,23 +14,24 @@ class EIP4361Test: XCTestCase {
 
     /// Parsing Sign in with Ethereum message
     func test_EIP4361Parsing() {
-        let rawSiweMessage = "service.invalid wants you to sign in with your Ethereum account:\n0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2\n\nI accept the ServiceOrg Terms of Service: https://service.invalid/tos\n\nURI: https://service.invalid/login\nVersion: 1\nChain ID: 1\nNonce: 32891756\nIssued At: 2021-09-30T16:25:24Z\nExpiration Time: 2021-09-29T15:25:24Z\nNot Before: 2021-10-28T14:25:24Z\nRequest ID: random-request-id_STRING!@$%%&\nResources:\n- ipfs://bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/\n- https://example.com/my-web2-claim.json"
+        let rawSiweMessage = "service.invalid wants you to sign in with your Ethereum account:\n0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2\n\nI accept the ServiceOrg Terms of Service: https://service.invalid/tos\n\nURI: https://service.invalid/login\nVersion: 1\nChain ID: 1\nNonce: 32891756\nIssued At: 2021-09-30T16:25:24.345Z\nExpiration Time: 2021-09-29T15:25:24.234Z\nNot Before: 2021-10-28T14:25:24.123Z\nRequest ID: random-request-id_STRING!@$%%&\nResources:\n- ipfs://bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/\n- https://example.com/my-web2-claim.json"
         guard let siweMessage = EIP4361(rawSiweMessage) else {
             XCTFail("Failed to parse SIWE message.")
             return
         }
 
         let dateFormatter = ISO8601DateFormatter()
+        dateFormatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
         XCTAssertEqual(siweMessage.domain, "service.invalid")
         XCTAssertEqual(siweMessage.address, EthereumAddress("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2")!)
         XCTAssertEqual(siweMessage.statement, "I accept the ServiceOrg Terms of Service: https://service.invalid/tos")
         XCTAssertEqual(siweMessage.uri, URL(string: "https://service.invalid/login")!)
         XCTAssertEqual(siweMessage.version, 1)
         XCTAssertEqual(siweMessage.chainId, 1)
         XCTAssertEqual(siweMessage.nonce, "32891756")
-        XCTAssertEqual(siweMessage.issuedAt, dateFormatter.date(from: "2021-09-30T16:25:24Z")!)
-        XCTAssertEqual(siweMessage.expirationTime, dateFormatter.date(from: "2021-09-29T15:25:24Z")!)
-        XCTAssertEqual(siweMessage.notBefore, dateFormatter.date(from: "2021-10-28T14:25:24Z")!)
+        XCTAssertEqual(siweMessage.issuedAt, dateFormatter.date(from: "2021-09-30T16:25:24.345Z")!)
+        XCTAssertEqual(siweMessage.expirationTime, dateFormatter.date(from: "2021-09-29T15:25:24.234Z")!)
+        XCTAssertEqual(siweMessage.notBefore, dateFormatter.date(from: "2021-10-28T14:25:24.123Z")!)
         XCTAssertEqual(siweMessage.requestId, "random-request-id_STRING!@$%%&")
         XCTAssertEqual(siweMessage.resources, [URL(string: "ipfs://bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq/")!,
                                                URL(string: "https://example.com/my-web2-claim.json")!])