chore: Additional test related to patches and capabilities

Author: peacekeeper

src/test/java/com/danubetech/dataintegrity/DidBtc1PatchTest.java

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+package com.danubetech.dataintegrity;
+
+import com.danubetech.dataintegrity.jsonld.DataIntegrityContexts;
+import com.danubetech.dataintegrity.verifier.DataIntegrityProofLdVerifier;
+import com.danubetech.keyformats.PublicKeyBytes;
+import com.danubetech.keyformats.crypto.PublicKeyVerifier;
+import com.danubetech.keyformats.crypto.PublicKeyVerifierFactory;
+import com.danubetech.keyformats.jose.JWSAlgorithm;
+import com.danubetech.keyformats.jose.KeyTypeName;
+import foundation.identity.jsonld.JsonLDException;
+import foundation.identity.jsonld.JsonLDObject;
+import io.ipfs.multibase.Multibase;
+import org.bitcoinj.crypto.ECKey;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class DidBtc1PatchTest {
+
+    @Test
+    public void testPatch() throws JsonLDException, GeneralSecurityException, IOException {
+
+        JsonLDObject jsonLdObject = JsonLDObject.fromJson(new InputStreamReader(Objects.requireNonNull(DidBtc1PatchTest.class.getResourceAsStream("did-btc1-patch.jsonld"))));
+        jsonLdObject.setDocumentLoader(DataIntegrityContexts.DOCUMENT_LOADER);
+
+        JsonLDObject verificationMethod = JsonLDObject.fromJson(new InputStreamReader(Objects.requireNonNull(DidBtc1PatchTest.class.getResourceAsStream("did-btc1-patch.verification-method.jsonld"))));
+        String publicKeyMultibase = (String) verificationMethod.getJsonObject().get("publicKeyMultibase");
+        byte[] publicKeyBytes = Arrays.copyOfRange(Multibase.decode(publicKeyMultibase), 2, 35);
+        ECKey publicKey = PublicKeyBytes.bytes_to_secp256k1PublicKey(publicKeyBytes);
+
+        PublicKeyVerifier<?> publicKeyVerifier = PublicKeyVerifierFactory.publicKeyVerifierForKey(KeyTypeName.secp256k1, JWSAlgorithm.ES256KS, publicKey);
+        DataIntegrityProofLdVerifier verifier = new DataIntegrityProofLdVerifier(publicKeyVerifier);
+        boolean verify = verifier.verify(jsonLdObject);
+
+        assertTrue(verify);
+    }
+}

src/test/resources/com/danubetech/dataintegrity/did-btc1-patch.jsonld

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+{
+    "@context": [
+        "https://w3id.org/security/v2",
+        "https://w3id.org/zcap/v1",
+        "https://w3id.org/json-ld-patch/v1"
+    ],
+    "patch": [
+        {
+            "op": "add",
+            "path": "/service/3",
+            "value": {
+                "id": "did:btc1:k1qgpmay0qswqklpth58vdhattea5dnu9jej25t3kl2gnjykznnylquxc2gnd4c#service-0",
+                "type": "SingletonBeacon",
+                "serviceEndpoint": "bitcoin:bcrt1pgc9gygrwkp2mme7szzsemx2nhkdpaw5u6cc4t9w5pg8dpje8jxsqxf05rv"
+            }
+        }
+    ],
+    "sourceHash": "5g8hNQyS5nGRD1xfoqT7EqN23C675xDuTFAP4sCpXTAk",
+    "targetHash": "4K5VkdE5tmt9KNoahrmVw9zX3vf7MsKCZ4urvKUWRXBw",
+    "targetVersionId": 2,
+    "proof": {
+        "type": "DataIntegrityProof",
+        "cryptosuite": "bip340-jcs-2025",
+        "verificationMethod": "did:btc1:k1qgpmay0qswqklpth58vdhattea5dnu9jej25t3kl2gnjykznnylquxc2gnd4c##initialKey",
+        "proofPurpose": "capabilityInvocation",
+        "capability": "urn:zcap:root:did%3Abtc1%3Ak1qgpmay0qswqklpth58vdhattea5dnu9jej25t3kl2gnjykznnylquxc2gnd4c",
+        "capabilityAction": "Write",
+        "@context": [
+            "https://w3id.org/security/v2",
+            "https://w3id.org/zcap/v1",
+            "https://w3id.org/json-ld-patch/v1"
+        ],
+        "proofValue": "z2CMaqir8yCBToudmMWozWKPxUtgjYRXju7VmhSsZTBV8BoPhwiZpkbx4m4vXEewbs5nZnoc2gvgE5B5iNkeUsLse"
+    }
+}

src/test/resources/com/danubetech/dataintegrity/did-btc1-patch.verification-method.jsonld

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+{
+    "id": "did:btc1:k1qgpmay0qswqklpth58vdhattea5dnu9jej25t3kl2gnjykznnylquxc2gnd4c##initialKey",
+    "type": "Multikey",
+    "controller": "did:btc1:k1qgpmay0qswqklpth58vdhattea5dnu9jej25t3kl2gnjykznnylquxc2gnd4c",
+    "publicKeyMultibase": "zQ3shsU1bzwDEU6nBAVRLfyo5ZvDrzHKs4ZXYxP13dksA7NRx"
+}