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Update zCap delegation logic for WAS #40

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Update zCap delegation logic for WAS #40

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38 changes: 24 additions & 14 deletions app/lib/handleZcapRequest.ts
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Original file line number Diff line number Diff line change
@@ -1,7 +1,8 @@
import { ZCAP_EXPIRES } from '../../app.config';
import { ZCAP_EXPIRES, WAS } from '../../app.config';
// @ts-ignore
import { ZcapClient } from '@digitalcredentials/ezcap';
import { Ed25519Signature2020 } from '@digitalcredentials/ed25519-signature-2020';
import AsyncStorage from '@react-native-async-storage/async-storage';

import { displayGlobalModal } from './globalModal';
import { getRootSigner } from './getRootSigner';
Expand Down Expand Up @@ -48,28 +49,37 @@ export default async function handleZcapRequest({
throw new Error('User denied Zcap delegation');
}

let rootSigner
try {
rootSigner = await getRootSigner();
} catch (error) {
throw new Error(`Error getting root signer: ${error}`);
}


const invocationTargetType = typeof invocationTarget === 'string' ? invocationTarget : invocationTarget.type;

const rootSigner = await getRootSigner();

const parentCapability = `urn:zcap:root:${encodeURIComponent(invocationTargetType)}`;
// Get stored space UUID
const storedSpaceUUID = await AsyncStorage.getItem(WAS.KEYS.SPACE_ID);
if (!storedSpaceUUID) {
throw new Error('No stored space ID found for WAS delegation');
}

const zcapClient = new ZcapClient({
SuiteClass: Ed25519Signature2020,
delegationSigner: rootSigner
delegationSigner: rootSigner,
});

const invocationTargetUrl = new URL(`/space/${storedSpaceUUID}`, WAS.BASE_URL).toString();

const allowedActions = ['GET', 'POST', 'PUT', 'DELETE'];

const parentCapability = `urn:zcap:root:${encodeURIComponent(invocationTargetUrl)}`;

const delegatedZcap = await zcapClient.delegate({
capability: parentCapability,
controller,
invocationTarget: invocationTargetType,
allowedActions: allowedAction,
expires: ZCAP_EXPIRES.toISOString()
invocationTarget: invocationTargetUrl,
allowedActions,
expires: ZCAP_EXPIRES.toISOString(),
});

return {
zcap: delegatedZcap
};
return { zcap: delegatedZcap };
}
18 changes: 16 additions & 2 deletions app/screens/WAS/WasConnect.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,21 @@ export default function WasConnectScreen() {
} catch (error) {
console.error('Connection failed:', error);
const errorMessage = error instanceof Error ? error.message : 'Unknown error occurred';
setStatusMessage(`Failed to connect wallet: ${errorMessage}`);
if (
typeof errorMessage === 'string' &&
(
errorMessage.includes('WAS is not enabled') ||
errorMessage.includes('Root signer not found in wallet') ||
errorMessage.includes('WAS connection required') ||
errorMessage.includes('Error getting root signer')
)
) {
setStatusMessage(
'This request first requires you to set up a WAS connection. Go to the dev menu and enable "Connect to WAS".'
);
} else {
setStatusMessage(`Failed to connect wallet: ${errorMessage}`);
}
setStatusType('error');

if (navigationRef.isReady()) {
Expand Down Expand Up @@ -102,7 +116,7 @@ const styles = StyleSheet.create({
padding: 20,
},
statusText: {
marginTop: 20,
marginBottom: 20,
fontSize: 16,
textAlign: 'center',
},
Expand Down