gather app utils in /src

app/src/screens/NextScreen.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { YStack, XStack, Text, Image, useWindowDimensions, Fieldset } from 'tamagui';
 import { ArrowRight, Info } from '@tamagui/lucide-icons';
-import { getFirstName, maskString } from '../../utils/utils';
+import { getFirstName, maskString } from '../utils/utils';
 import { attributeToPosition } from '../../../common/src/constants/constants';
 import USER_PROFILE from '../images/user_profile.png'
 import { bgGreen, borderColor, componentBgColor, textBlack, textColor1, textColor2 } from '../utils/colors';
@@ -11,7 +11,6 @@ import useUserStore from '../stores/userStore';
 import useNavigationStore from '../stores/navigationStore';
 import CustomButton from '../components/CustomButton';
 
-
 const NextScreen: React.FC = () => {
 
   const { height } = useWindowDimensions();

app/src/utils/nfcScanner.ts

@@ -2,7 +2,7 @@ import { NativeModules, Platform } from 'react-native';
 // @ts-ignore
 import PassportReader from 'react-native-passport-reader';
 import { toStandardName } from '../../../common/src/utils/formatNames';
-import { checkInputs } from '../../utils/utils';
+import { checkInputs } from '../utils/utils';
 import { PassportData } from '../../../common/src/utils/types';
 import forge from 'node-forge';
 import { Buffer } from 'buffer';

app/src/utils/transactions.ts

@@ -1,6 +1,6 @@
 import { ethers } from "ethers";
 import axios from 'axios';
-import groth16ExportSolidityCallData from '../../utils/snarkjs';
+import groth16ExportSolidityCallData from './snarkjs';
 import contractAddresses from "../../deployments/deployed_addresses.json";
 import registerArtefacts from "../../deployments/artifacts/Deploy_Registry#OpenPassportRegister.json";
 import sbtArtefacts from "../../deployments/artifacts/Deploy_Registry#SBT.json";

app/src/utils/utils.ts

@@ -81,4 +81,46 @@ export const parseProofAndroid = (response: string) => {
     },
     pub_signals: pub_signals.split(',').map((n: string) => n.trim())
   } as Proof;
-};
+};
+
+export function getFirstName(mrz: string): string {
+  const names = mrz.split("<<");
+  const firstName = names[1].split("<")[0].trim();
+  const capitalized = firstName.charAt(0) + firstName.slice(1).toLowerCase();
+  return capitalized || "Unknown";
+}
+
+export function checkInputs(
+  passportNumber: string,
+  dateOfBirth: string,
+  dateOfExpiry: string,
+): { success: boolean, message: string } {
+  // if (passportNumber.length !== 9) {
+  //   throw new Error('Passport number must be 9 characters long');
+  // }
+  if (dateOfBirth.length !== 6) {
+    return {
+      success: false,
+      message: 'Complete Step 1 first'
+    };
+  }
+  if (dateOfExpiry.length !== 6) {
+    return {
+      success: false,
+      message: 'Date of expiry must be 6 characters long'
+    };
+  }
+
+  return {
+    success: true,
+    message: ''
+  };
+}
+
+export const maskString = (input: string): string => {
+  if (input.length <= 5) {
+    return input.charAt(0) + '*'.repeat(input.length - 1);
+  } else {
+    return input.charAt(0) + input.charAt(1) + '*'.repeat(input.length - 2);
+  }
+}