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Added Digest Helper and PreDigestReader (#590)
Added Digest Helper class for processing different types of header digests and PreDigestReader
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26 changes: 26 additions & 0 deletions
26
src/main/java/com/limechain/babe/predigest/scale/PreDigestReader.java
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| package com.limechain.babe.predigest.scale; | ||
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| import com.limechain.babe.predigest.BabePreDigest; | ||
| import com.limechain.babe.predigest.PreDigestType; | ||
| import io.emeraldpay.polkaj.scale.ScaleCodecReader; | ||
| import io.emeraldpay.polkaj.scale.ScaleReader; | ||
| import io.emeraldpay.polkaj.scale.reader.UInt64Reader; | ||
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| import static io.emeraldpay.polkaj.schnorrkel.VrfOutputAndProof.OUTPUT_BYTE_LEN; | ||
| import static io.emeraldpay.polkaj.schnorrkel.VrfOutputAndProof.PROOF_BYTE_LEN; | ||
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| public class PreDigestReader implements ScaleReader<BabePreDigest> { | ||
| @Override | ||
| public BabePreDigest read(ScaleCodecReader reader) { | ||
| BabePreDigest preDigest = new BabePreDigest(); | ||
| PreDigestType type = PreDigestType.getByValue(reader.readByte()); | ||
| preDigest.setType(type); | ||
| preDigest.setAuthorityIndex(reader.readUint32()); | ||
| preDigest.setSlotNumber(new UInt64Reader().read(reader)); | ||
| if (!PreDigestType.BABE_SECONDARY_PLAIN.equals(type)) { | ||
| preDigest.setVrfOutput(reader.readByteArray(OUTPUT_BYTE_LEN)); | ||
| preDigest.setVrfProof(reader.readByteArray(PROOF_BYTE_LEN)); | ||
| } | ||
| return preDigest; | ||
| } | ||
| } |
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50 changes: 50 additions & 0 deletions
50
src/main/java/com/limechain/network/protocol/warp/DigestHelper.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,50 @@ | ||
| package com.limechain.network.protocol.warp; | ||
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| import com.limechain.babe.predigest.BabePreDigest; | ||
| import com.limechain.babe.predigest.scale.PreDigestReader; | ||
| import com.limechain.babe.state.EpochState; | ||
| import com.limechain.network.protocol.warp.dto.ConsensusEngine; | ||
| import com.limechain.network.protocol.warp.dto.DigestType; | ||
| import com.limechain.network.protocol.warp.dto.HeaderDigest; | ||
| import com.limechain.rpc.server.AppBean; | ||
| import com.limechain.utils.scale.ScaleUtils; | ||
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| import java.util.Arrays; | ||
| import java.util.Optional; | ||
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| /** | ||
| * Helper class for processing different types of header digests | ||
| */ | ||
| public class DigestHelper { | ||
| private EpochState epochState; | ||
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| public DigestHelper() { | ||
| this.epochState = AppBean.getBean(EpochState.class); | ||
| } | ||
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| public void handleHeaderDigests(HeaderDigest[] headerDigests) { | ||
| if (headerDigests == null || headerDigests.length == 0) { | ||
| return; | ||
| } | ||
| updateEpochStateIfBabeConsensusMessageExists(headerDigests); | ||
| handleBabePreRuntimeDigest(headerDigests); | ||
| } | ||
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| private void updateEpochStateIfBabeConsensusMessageExists(HeaderDigest[] headerDigests) { | ||
| Arrays.stream(headerDigests) | ||
| .filter(headerDigest -> DigestType.CONSENSUS_MESSAGE.equals(headerDigest.getType()) && | ||
| ConsensusEngine.BABE.equals(headerDigest.getId())) | ||
| .findFirst() | ||
| .map(HeaderDigest::getMessage) | ||
| .ifPresent(message -> epochState.updateNextEpochBlockConfig(message)); | ||
| } | ||
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| private Optional<BabePreDigest> handleBabePreRuntimeDigest(HeaderDigest[] headerDigests) { | ||
| return Arrays.stream(headerDigests) | ||
| .filter(headerDigest -> DigestType.PRE_RUNTIME.equals(headerDigest.getType()) && | ||
| ConsensusEngine.BABE.equals(headerDigest.getId())) | ||
| .findFirst() | ||
| .map(HeaderDigest::getMessage) | ||
| .map(message -> ScaleUtils.Decode.decode(message, new PreDigestReader())); | ||
| } | ||
| } |
36 changes: 36 additions & 0 deletions
36
src/test/java/com/limechain/babe/scale/PreDigestScaleTest.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,36 @@ | ||
| package com.limechain.babe.scale; | ||
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| import com.limechain.babe.predigest.BabePreDigest; | ||
| import com.limechain.babe.predigest.PreDigestType; | ||
| import com.limechain.babe.predigest.scale.PreDigestReader; | ||
| import com.limechain.babe.predigest.scale.PreDigestWriter; | ||
| import com.limechain.utils.StringUtils; | ||
| import com.limechain.utils.scale.ScaleUtils; | ||
| import org.junit.jupiter.api.Test; | ||
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| import java.math.BigInteger; | ||
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| import static io.emeraldpay.polkaj.schnorrkel.VrfOutputAndProof.OUTPUT_BYTE_LEN; | ||
| import static io.emeraldpay.polkaj.schnorrkel.VrfOutputAndProof.PROOF_BYTE_LEN; | ||
| import static org.junit.jupiter.api.Assertions.*; | ||
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| public class PreDigestScaleTest { | ||
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| @Test | ||
| public void testEncodeAndDecode_BABE_SECONDARY_VRF() { | ||
| byte[] bytes = StringUtils.hexToBytes("0x03b7010000286f301100000000424dc7bc71c9b0f3a15b6aba389471fff57e154dbf3dc046f47513a38375ce4cfe421df446b2b7a0f5b1b2e69c810a6ba36787c0301e6636df3e45688116e005363dfe9922b3b7cc7b80e2fdab8b0b98dcfb4b96cc470fb35f753debda40aa0e"); | ||
| BabePreDigest preDigest = ScaleUtils.Decode.decode(bytes, new PreDigestReader()); | ||
| assertEquals(PreDigestType.BABE_SECONDARY_VRF, preDigest.getType()); | ||
| assertEquals(439, preDigest.getAuthorityIndex()); | ||
| assertEquals(BigInteger.valueOf(288386856), preDigest.getSlotNumber()); | ||
| byte[] vrfOutput = preDigest.getVrfOutput(); | ||
| byte[] vrfProof = preDigest.getVrfProof(); | ||
| assertNotNull(vrfOutput); | ||
| assertNotNull(vrfProof); | ||
| assertEquals(OUTPUT_BYTE_LEN, vrfOutput.length); | ||
| assertEquals(PROOF_BYTE_LEN, vrfProof.length); | ||
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| byte[] encode = ScaleUtils.Encode.encode(new PreDigestWriter(), preDigest); | ||
| assertArrayEquals(bytes, encode); | ||
| } | ||
| } |
73 changes: 0 additions & 73 deletions
73
src/test/java/com/limechain/babe/scale/PreDigestWriterTest.java
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