switch network to amoy

client/src/app/components/qrCode.tsx

@@ -13,7 +13,7 @@ const Code: FunctionComponent<QRCodeData> = (props) => {
       <Box>
         <QRCode level={"L"} size={350} value={value} />
         <Button onClick={() => dispachEvent(value)} 
-          variant="contained" size="large" style={{width: '350px', marginTop: '15px'}}>Polygon ID</Button>
+          variant="contained" size="large" style={{width: '350px', marginTop: '15px'}}>Privado ID</Button>
       </Box>
     </Container>
   );

client/src/pages/index.tsx

@@ -5,6 +5,7 @@ import Button from "@mui/material/Button";
 import Grid from "@mui/material/Unstable_Grid2";
 import SelectedIssuerContext from "@/contexts/SelectedIssuerContext";
 import { useRouter } from "next/router";
+import { switchNetwork } from '@/services/onchainIssuer';
 
 const App = () => {
   const router = useRouter();
@@ -22,6 +23,7 @@ const App = () => {
   };
 
   useEffect(() => {
+    switchNetwork();
     const fetchIssuers = async () => {
       try {
         const issuers = await getIssuersList();

client/src/pages/signin.tsx

@@ -70,7 +70,7 @@ const MyPage = () => {
 
       <Grid xs={12} style={{marginTop: '-30px'}}>
         <Typography textAlign="center" variant='h2'>
-          Use polygonID mobile app to scan this QR code
+          Use PrivadoID mobile app to scan this QR code
         </Typography>
       </Grid>
       <Grid alignItems="center" xs={12} style={{marginTop: '30px'}}>

client/src/services/onchainIssuer.tsx

@@ -6,6 +6,26 @@ import abi from "./abi.json";
 const nullifierSeed = process.env.NEXT_PUBLIC_NULLIFIER_SEED!;
 const contractABI = abi.abi;
 
+const amoyChainID: bigint = BigInt(80002);
+export const switchNetwork = async () => {
+  const web3 = new Web3(window.ethereum);
+  const networkId = await web3.eth.net.getId();
+  if (networkId !== amoyChainID) {
+    try {
+      await window.ethereum.request({
+        method: 'wallet_switchEthereumChain',
+        params: [{ chainId: `0x${amoyChainID.toString(16)}` }],
+      });
+    } catch (switchError: any) {
+      if (switchError.code === 4902) {
+        throw new Error('This network is not available in your MetaMask, please add it.');
+      } else {
+        throw new Error('Failed to switch network');
+      }
+    }
+  }
+};
+
 export const issueCredential = async (
   contractAddress: string,
   userId: Id,