Implement Local Queries for Governance-Related Data

core/src/main/java/com/bloxbean/cardano/yaci/core/protocol/localstate/queries/ConstitutionQuery.java

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+package com.bloxbean.cardano.yaci.core.protocol.localstate.queries;
+
+import co.nstant.in.cbor.model.Array;
+import co.nstant.in.cbor.model.DataItem;
+import co.nstant.in.cbor.model.UnsignedInteger;
+import com.bloxbean.cardano.yaci.core.model.governance.Anchor;
+import com.bloxbean.cardano.yaci.core.model.serializers.governance.AnchorSerializer;
+import com.bloxbean.cardano.yaci.core.protocol.handshake.messages.AcceptVersion;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.Era;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.EraQuery;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.ToString;
+
+import java.util.List;
+
+@Getter
+@AllArgsConstructor
+@ToString
+// ouroboros-consensus-cardano/src/shelley/Ouroboros/Consensus/Shelley/Ledger/Query.hs
+public class ConstitutionQuery implements EraQuery<ConstitutionResult> {
+    @NonNull
+    private Era era;
+
+    public ConstitutionQuery() {
+        this.era = Era.Conway;
+    }
+
+    @Override
+    public DataItem serialize(AcceptVersion protocolVersion) {
+        Array queryArray = new Array();
+        queryArray.add(new UnsignedInteger(23));
+
+        return wrapWithOuterArray(queryArray);
+    }
+
+    @Override
+    public ConstitutionResult deserializeResult(AcceptVersion protocolVersion, DataItem[] di) {
+        List<DataItem> dataItemList = ((Array)di[0]).getDataItems();
+
+        int type = ((UnsignedInteger)dataItemList.get(0)).getValue().intValue(); //4
+
+        List<DataItem> resultDIList = ((Array)dataItemList.get(1)).getDataItems();
+        var items = (Array)resultDIList.get(0);
+
+        Anchor anchor = AnchorSerializer.INSTANCE.deserializeDI(items.getDataItems().get(0));
+        return new ConstitutionResult(anchor);
+    }
+}

core/src/main/java/com/bloxbean/cardano/yaci/core/protocol/localstate/queries/ConstitutionResult.java

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+package com.bloxbean.cardano.yaci.core.protocol.localstate.queries;
+
+import com.bloxbean.cardano.yaci.core.model.governance.Anchor;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.QueryResult;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@Getter
+@AllArgsConstructor
+@ToString
+public class ConstitutionResult implements QueryResult {
+    private Anchor anchor;
+}

core/src/main/java/com/bloxbean/cardano/yaci/core/protocol/localstate/queries/DRepStateQuery.java

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+package com.bloxbean.cardano.yaci.core.protocol.localstate.queries;
+
+
+import co.nstant.in.cbor.model.Array;
+import co.nstant.in.cbor.model.DataItem;
+import co.nstant.in.cbor.model.Map;
+import co.nstant.in.cbor.model.UnsignedInteger;
+import com.bloxbean.cardano.yaci.core.model.Credential;
+import com.bloxbean.cardano.yaci.core.model.governance.Anchor;
+import com.bloxbean.cardano.yaci.core.model.serializers.governance.AnchorSerializer;
+import com.bloxbean.cardano.yaci.core.protocol.handshake.messages.AcceptVersion;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.Era;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.EraQuery;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.queries.model.DRepState;
+import com.bloxbean.cardano.yaci.core.util.CborSerializationUtil;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+@AllArgsConstructor
+public class DRepStateQuery implements EraQuery<DRepStateQueryResult> {
+    private Era era;
+    private List<Credential> dRepCreds;
+
+    public DRepStateQuery(List<Credential> dRepCreds) {
+        this(Era.Conway, dRepCreds);
+    }
+
+    @Override
+    public DataItem serialize(AcceptVersion protocolVersion) {
+        Array array = new Array();
+        array.add(new UnsignedInteger(25));
+
+        Array dRepCredArray = new Array();
+
+        dRepCreds.forEach(dRepCred -> dRepCredArray.add(dRepCred.serialize()));
+
+        dRepCredArray.setTag(258);
+
+        array.add(dRepCredArray);
+
+        return wrapWithOuterArray(array);
+    }
+
+    @Override
+    public DRepStateQueryResult deserializeResult(AcceptVersion protocolVersion, DataItem[] di) {
+        DRepStateQueryResult result = new DRepStateQueryResult();
+        var array = (Array) di[0];
+        var drepStateArray = (Array) array.getDataItems().get(1);
+
+        for (var dataItem : drepStateArray.getDataItems()) {
+            var map = (Map)dataItem;
+            var keys = (List<DataItem>)map.getKeys();
+
+            if (keys.isEmpty()) {
+                continue;
+            }
+            for (var key : keys) {
+                var itemDI = (Array)key;
+                String dRepHash = CborSerializationUtil.toHex(itemDI.getDataItems().get(1));
+                var value = (Array) map.get(itemDI);
+                Integer expiry = CborSerializationUtil.toInt(value.getDataItems().get(0));
+
+                Anchor anchor = null;
+                if (((Array) value.getDataItems().get(1)).getDataItems().size() > 0) {
+                    anchor = AnchorSerializer.INSTANCE.deserializeDI(((Array)value.getDataItems().get(1)).getDataItems().get(0));
+                }
+
+                BigInteger deposit = CborSerializationUtil.toBigInteger(value.getDataItems().get(2));
+
+                var dRepState = DRepState.builder()
+                        .dRepHash(dRepHash)
+                        .anchor(anchor)
+                        .deposit(deposit)
+                        .expiry(expiry)
+                        .build();
+
+                result.addDRepState(dRepState);
+            }
+        }
+
+        return result;
+    }
+}

core/src/main/java/com/bloxbean/cardano/yaci/core/protocol/localstate/queries/DRepStateQueryResult.java

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+package com.bloxbean.cardano.yaci.core.protocol.localstate.queries;
+
+import com.bloxbean.cardano.yaci.core.protocol.localstate.api.QueryResult;
+import com.bloxbean.cardano.yaci.core.protocol.localstate.queries.model.DRepState;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Setter
+@Getter
+public class DRepStateQueryResult implements QueryResult {
+    List<DRepState> dRepStates;
+
+    public DRepStateQueryResult() {
+        this.dRepStates = new ArrayList<>();
+    }
+
+    public void addDRepState(DRepState dRepState) {
+        dRepStates.add(dRepState);
+    }
+}