verifyBindings

Verifies the manifest's bindings (e.g., App Attest attestation). Checks the cryptographic integrity of the hardware-backed assertion.

Usage

import { VerifiableFile } from '@succinctlabs/react-native-zcam1';
 
const verifiable = new VerifiableFile(photoPath);
 
// For development/testing
const isValid = verifiable.verifyBindings(false);
 
// For production
const isValid = verifiable.verifyBindings(true);

Parameters

appAttestProduction (required)

Type: boolean

Whether to verify against production App Attest environment. Use false for development/testing, true for production.

Returns

boolean - true if bindings are valid, false otherwise.

Example

import { useState } from 'react';
import { Button, Text, View, StyleSheet } from 'react-native';
import { VerifiableFile } from '@succinctlabs/react-native-zcam1';
import { launchImageLibrary } from 'react-native-image-picker';
 
function BindingsVerificationScreen() {
  const [result, setResult] = useState<string>('');
 
  const verifyBindings = async () => {
    const response = await launchImageLibrary({ mediaType: 'photo' });
    const uri = response.assets?.[0]?.uri;
    
    if (!uri) return;
 
    try {
      const verifiable = new VerifiableFile(uri);
      const isValid = verifiable.verifyBindings(false); // Use false for dev
      
      if (isValid) {
        setResult('✓ Hardware bindings verified!');
      } else {
        setResult('✗ Bindings verification failed');
      }
    } catch (error: any) {
      setResult(`Error: ${error.message}`);
    }
  };
 
  return (
    <View style={styles.container}>
      <Button title="Verify Bindings" onPress={verifyBindings} />
      {result && <Text style={styles.result}>{result}</Text>}
    </View>
  );
}

Notes

Verifies the App Attest attestation embedded in the C2PA manifest
The appAttestProduction parameter must match the environment where the photo was captured
Photos captured with ZCamera include hardware-backed bindings automatically
Bindings verify the authenticity of the device and key material used during capture