Add wrapper classes for config section of genesis file (#208)

* Introduce classes to wrap JSON config instead of accessing it directly in multiple places.

* Fix discrepancy in how CliqueProtocolSchedule and CliquePantheonController loaded the block period configuration.

config/build.gradle

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
+apply plugin: 'java-library'
+
+jar {
+  baseName 'pantheon-config'
+  manifest {
+    attributes('Implementation-Title': baseName,
+    'Implementation-Version': project.version)
+  }
+}
+
+dependencies {
+  implementation 'com.fasterxml.jackson.core:jackson-databind'
+  implementation 'io.vertx:vertx-core'
+  implementation 'org.apache.logging.log4j:log4j-api'
+
+  runtime 'org.apache.logging.log4j:log4j-core'
+
+  testImplementation project(':testutil')
+
+  testImplementation 'org.assertj:assertj-core'
+  testImplementation 'org.mockito:mockito-core'
+  testImplementation 'junit:junit'
+}

config/src/main/java/tech/pegasys/pantheon/config/CliqueConfigOptions.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import io.vertx.core.json.JsonObject;
+
+public class CliqueConfigOptions {
+
+  public static final CliqueConfigOptions DEFAULT = new CliqueConfigOptions(new JsonObject());
+
+  private static final long DEFAULT_EPOCH_LENGTH = 30_000;
+  private static final int DEFAULT_BLOCK_PERIOD_SECONDS = 15;
+
+  private final JsonObject cliqueConfigRoot;
+
+  public CliqueConfigOptions(final JsonObject cliqueConfigRoot) {
+    this.cliqueConfigRoot = cliqueConfigRoot;
+  }
+
+  public long getEpochLength() {
+    return cliqueConfigRoot.getLong("epochLength", DEFAULT_EPOCH_LENGTH);
+  }
+
+  public int getBlockPeriodSeconds() {
+    return cliqueConfigRoot.getInteger("blockPeriodSeconds", DEFAULT_BLOCK_PERIOD_SECONDS);
+  }
+}

config/src/main/java/tech/pegasys/pantheon/config/GenesisConfigOptions.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import java.util.OptionalInt;
+import java.util.OptionalLong;
+
+import io.vertx.core.json.JsonObject;
+
+public class GenesisConfigOptions {
+
+  private static final String ETHASH_CONFIG_KEY = "ethash";
+  private static final String IBFT_CONFIG_KEY = "ibft";
+  private static final String CLIQUE_CONFIG_KEY = "clique";
+  private final JsonObject configRoot;
+
+  private GenesisConfigOptions(final JsonObject configRoot) {
+    this.configRoot = configRoot != null ? configRoot : new JsonObject();
+  }
+
+  public static GenesisConfigOptions fromGenesisConfig(final String genesisConfig) {
+    return fromGenesisConfig(new JsonObject(genesisConfig));
+  }
+
+  public static GenesisConfigOptions fromGenesisConfig(final JsonObject genesisConfig) {
+    return new GenesisConfigOptions(genesisConfig.getJsonObject("config"));
+  }
+
+  public boolean isEthHash() {
+    return configRoot.containsKey(ETHASH_CONFIG_KEY);
+  }
+
+  public boolean isIbft() {
+    return configRoot.containsKey(IBFT_CONFIG_KEY);
+  }
+
+  public boolean isClique() {
+    return configRoot.containsKey(CLIQUE_CONFIG_KEY);
+  }
+
+  public IbftConfigOptions getIbftConfigOptions() {
+    return isIbft()
+        ? new IbftConfigOptions(configRoot.getJsonObject(IBFT_CONFIG_KEY))
+        : IbftConfigOptions.DEFAULT;
+  }
+
+  public CliqueConfigOptions getCliqueConfigOptions() {
+    return isClique()
+        ? new CliqueConfigOptions(configRoot.getJsonObject(CLIQUE_CONFIG_KEY))
+        : CliqueConfigOptions.DEFAULT;
+  }
+
+  public OptionalLong getHomesteadBlockNumber() {
+    return getOptionalLong("homesteadBlock");
+  }
+
+  public OptionalLong getDaoForkBlock() {
+    return getOptionalLong("daoForkBlock");
+  }
+
+  public OptionalLong getTangerineWhistleBlockNumber() {
+    return getOptionalLong("eip150Block");
+  }
+
+  public OptionalLong getSpuriousDragonBlockNumber() {
+    return getOptionalLong("eip158Block");
+  }
+
+  public OptionalLong getByzantiumBlockNumber() {
+    return getOptionalLong("byzantiumBlock");
+  }
+
+  public OptionalLong getConstantinopleBlockNumber() {
+    return getOptionalLong("constantinopleBlock");
+  }
+
+  public OptionalInt getChainId() {
+    return configRoot.containsKey("chainId")
+        ? OptionalInt.of(configRoot.getInteger("chainId"))
+        : OptionalInt.empty();
+  }
+
+  private OptionalLong getOptionalLong(final String key) {
+    return configRoot.containsKey(key)
+        ? OptionalLong.of(configRoot.getLong(key))
+        : OptionalLong.empty();
+  }
+}

config/src/main/java/tech/pegasys/pantheon/config/IbftConfigOptions.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import io.vertx.core.json.JsonObject;
+
+public class IbftConfigOptions {
+
+  public static final IbftConfigOptions DEFAULT = new IbftConfigOptions(new JsonObject());
+
+  private static final long DEFAULT_EPOCH_LENGTH = 30_000;
+  private static final int DEFAULT_BLOCK_PERIOD_SECONDS = 1;
+  private static final int DEFAULT_ROUND_EXPIRY_MILLISECONDS = 10000;
+
+  private final JsonObject ibftConfigRoot;
+
+  public IbftConfigOptions(final JsonObject ibftConfigRoot) {
+    this.ibftConfigRoot = ibftConfigRoot;
+  }
+
+  public long getEpochLength() {
+    return ibftConfigRoot.getLong("epochLength", DEFAULT_EPOCH_LENGTH);
+  }
+
+  public int getBlockPeriodSeconds() {
+    return ibftConfigRoot.getInteger("blockPeriodSeconds", DEFAULT_BLOCK_PERIOD_SECONDS);
+  }
+
+  public int getRequestTimeoutMillis() {
+    return ibftConfigRoot.getInteger("requestTimeout", DEFAULT_ROUND_EXPIRY_MILLISECONDS);
+  }
+}

config/src/test/java/tech/pegasys/pantheon/config/CliqueConfigOptionsTest.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.singletonMap;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Map;
+
+import io.vertx.core.json.JsonObject;
+import org.junit.Test;
+
+public class CliqueConfigOptionsTest {
+
+  private static final long EXPECTED_DEFAULT_EPOCH_LENGTH = 30_000;
+  private static final int EXPECTED_DEFAULT_BLOCK_PERIOD = 15;
+
+  @Test
+  public void shouldGetEpochLengthFromConfig() {
+    final CliqueConfigOptions config = fromConfigOptions(singletonMap("epochLength", 10_000));
+    assertThat(config.getEpochLength()).isEqualTo(10_000);
+  }
+
+  @Test
+  public void shouldFallbackToDefaultEpochLength() {
+    final CliqueConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getEpochLength()).isEqualTo(EXPECTED_DEFAULT_EPOCH_LENGTH);
+  }
+
+  @Test
+  public void shouldGetDefaultEpochLengthFromDefaultConfig() {
+    assertThat(CliqueConfigOptions.DEFAULT.getEpochLength())
+        .isEqualTo(EXPECTED_DEFAULT_EPOCH_LENGTH);
+  }
+
+  @Test
+  public void shouldGetBlockPeriodFromConfig() {
+    final CliqueConfigOptions config = fromConfigOptions(singletonMap("blockPeriodSeconds", 5));
+    assertThat(config.getBlockPeriodSeconds()).isEqualTo(5);
+  }
+
+  @Test
+  public void shouldFallbackToDefaultBlockPeriod() {
+    final CliqueConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getBlockPeriodSeconds()).isEqualTo(EXPECTED_DEFAULT_BLOCK_PERIOD);
+  }
+
+  @Test
+  public void shouldGetDefaultBlockPeriodFromDefaultConfig() {
+    assertThat(CliqueConfigOptions.DEFAULT.getBlockPeriodSeconds())
+        .isEqualTo(EXPECTED_DEFAULT_BLOCK_PERIOD);
+  }
+
+  private CliqueConfigOptions fromConfigOptions(final Map<String, Object> cliqueConfigOptions) {
+    return GenesisConfigOptions.fromGenesisConfig(
+            new JsonObject(singletonMap("config", singletonMap("clique", cliqueConfigOptions))))
+        .getCliqueConfigOptions();
+  }
+}

config/src/test/java/tech/pegasys/pantheon/config/GenesisConfigOptionsTest.java

@@ -0,0 +1,134 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.singletonMap;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.vertx.core.json.JsonObject;
+import org.junit.Test;
+
+public class GenesisConfigOptionsTest {
+
+  @Test
+  public void shouldUseEthHashWhenEthHashInConfig() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("ethash", emptyMap()));
+    assertThat(config.isEthHash()).isTrue();
+  }
+
+  @Test
+  public void shouldNotUseEthHashIfEthHashNotPresent() {
+    final GenesisConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.isEthHash()).isFalse();
+  }
+
+  @Test
+  public void shouldUseIbftWhenIbftInConfig() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("ibft", emptyMap()));
+    assertThat(config.isIbft()).isTrue();
+    assertThat(config.getIbftConfigOptions()).isNotSameAs(IbftConfigOptions.DEFAULT);
+  }
+
+  @Test
+  public void shouldNotUseIbftIfIbftNotPresent() {
+    final GenesisConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.isIbft()).isFalse();
+    assertThat(config.getIbftConfigOptions()).isSameAs(IbftConfigOptions.DEFAULT);
+  }
+
+  @Test
+  public void shouldUseCliqueWhenCliqueInConfig() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("clique", emptyMap()));
+    assertThat(config.isClique()).isTrue();
+    assertThat(config.getCliqueConfigOptions()).isNotSameAs(CliqueConfigOptions.DEFAULT);
+  }
+
+  @Test
+  public void shouldNotUseCliqueIfCliqueNotPresent() {
+    final GenesisConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.isClique()).isFalse();
+    assertThat(config.getCliqueConfigOptions()).isSameAs(CliqueConfigOptions.DEFAULT);
+  }
+
+  @Test
+  public void shouldGetHomesteadBlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("homesteadBlock", 1000));
+    assertThat(config.getHomesteadBlockNumber()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldGetDaoForkBlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("daoForkBlock", 1000));
+    assertThat(config.getDaoForkBlock()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldGetTangerineWhistleBlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("eip150Block", 1000));
+    assertThat(config.getTangerineWhistleBlockNumber()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldGetSpuriousDragonBlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("eip158Block", 1000));
+    assertThat(config.getSpuriousDragonBlockNumber()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldGetByzantiumBlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("byzantiumBlock", 1000));
+    assertThat(config.getByzantiumBlockNumber()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldGetConstantinopleBlockNumber() {
+    final GenesisConfigOptions config =
+        fromConfigOptions(singletonMap("constantinopleBlock", 1000));
+    assertThat(config.getConstantinopleBlockNumber()).hasValue(1000);
+  }
+
+  @Test
+  public void shouldNotReturnEmptyOptionalWhenBlockNumberNotSpecified() {
+    final GenesisConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getHomesteadBlockNumber()).isEmpty();
+    assertThat(config.getDaoForkBlock()).isEmpty();
+    assertThat(config.getTangerineWhistleBlockNumber()).isEmpty();
+    assertThat(config.getSpuriousDragonBlockNumber()).isEmpty();
+    assertThat(config.getByzantiumBlockNumber()).isEmpty();
+    assertThat(config.getConstantinopleBlockNumber()).isEmpty();
+  }
+
+  @Test
+  public void shouldGetChainIdWhenSpecified() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("chainId", 32));
+    assertThat(config.getChainId()).hasValue(32);
+  }
+
+  @Test
+  public void shouldSupportEmptyGenesisConfig() {
+    final GenesisConfigOptions config = GenesisConfigOptions.fromGenesisConfig("{}");
+    assertThat(config.isEthHash()).isFalse();
+    assertThat(config.isIbft()).isFalse();
+    assertThat(config.isClique()).isFalse();
+    assertThat(config.getHomesteadBlockNumber()).isEmpty();
+  }
+
+  private GenesisConfigOptions fromConfigOptions(final Map<String, Object> options) {
+    return GenesisConfigOptions.fromGenesisConfig(
+        new JsonObject(Collections.singletonMap("config", options)));
+  }
+}

config/src/test/java/tech/pegasys/pantheon/config/IbftConfigOptionsTest.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2018 ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+package tech.pegasys.pantheon.config;
+
+import static java.util.Collections.emptyMap;
+import static java.util.Collections.singletonMap;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Map;
+
+import io.vertx.core.json.JsonObject;
+import org.junit.Test;
+
+public class IbftConfigOptionsTest {
+
+  private static final int EXPECTED_DEFAULT_EPOCH_LENGTH = 30_000;
+  private static final int EXPECTED_DEFAULT_BLOCK_PERIOD = 1;
+  private static final int EXPECTED_DEFAULT_REQUEST_TIMEOUT = 10_000;
+
+  @Test
+  public void shouldGetEpochLengthFromConfig() {
+    final IbftConfigOptions config = fromConfigOptions(singletonMap("epochLength", 10_000));
+    assertThat(config.getEpochLength()).isEqualTo(10_000);
+  }
+
+  @Test
+  public void shouldFallbackToDefaultEpochLength() {
+    final IbftConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getEpochLength()).isEqualTo(EXPECTED_DEFAULT_EPOCH_LENGTH);
+  }
+
+  @Test
+  public void shouldGetDefaultEpochLengthFromDefaultConfig() {
+    assertThat(IbftConfigOptions.DEFAULT.getEpochLength()).isEqualTo(EXPECTED_DEFAULT_EPOCH_LENGTH);
+  }
+
+  @Test
+  public void shouldGetBlockPeriodFromConfig() {
+    final IbftConfigOptions config = fromConfigOptions(singletonMap("blockPeriodSeconds", 5));
+    assertThat(config.getBlockPeriodSeconds()).isEqualTo(5);
+  }
+
+  @Test
+  public void shouldFallbackToDefaultBlockPeriod() {
+    final IbftConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getBlockPeriodSeconds()).isEqualTo(EXPECTED_DEFAULT_BLOCK_PERIOD);
+  }
+
+  @Test
+  public void shouldGetDefaultBlockPeriodFromDefaultConfig() {
+    assertThat(IbftConfigOptions.DEFAULT.getBlockPeriodSeconds())
+        .isEqualTo(EXPECTED_DEFAULT_BLOCK_PERIOD);
+  }
+
+  @Test
+  public void shouldGetRequestTimeoutFromConfig() {
+    final IbftConfigOptions config = fromConfigOptions(singletonMap("requestTimeout", 5));
+    assertThat(config.getRequestTimeoutMillis()).isEqualTo(5);
+  }
+
+  @Test
+  public void shouldFallbackToDefaultRequestTimeout() {
+    final IbftConfigOptions config = fromConfigOptions(emptyMap());
+    assertThat(config.getRequestTimeoutMillis()).isEqualTo(EXPECTED_DEFAULT_REQUEST_TIMEOUT);
+  }
+
+  @Test
+  public void shouldGetDefaultRequestTimeoutFromDefaultConfig() {
+    assertThat(IbftConfigOptions.DEFAULT.getRequestTimeoutMillis())
+        .isEqualTo(EXPECTED_DEFAULT_REQUEST_TIMEOUT);
+  }
+
+  private IbftConfigOptions fromConfigOptions(final Map<String, Object> ibftConfigOptions) {
+    return GenesisConfigOptions.fromGenesisConfig(
+            new JsonObject(singletonMap("config", singletonMap("ibft", ibftConfigOptions))))
+        .getIbftConfigOptions();
+  }
+}

consensus/clique/build.gradle

@@ -24,6 +24,7 @@ jar {
 repositories { mavenCentral() }
 
 dependencies {
+  implementation project(':config')
   implementation project(':crypto')
   implementation project(':ethereum:core')
   implementation project(':ethereum:blockcreation')

consensus/clique/src/main/java/tech/pegasys/pantheon/consensus/clique/CliqueProtocolSchedule.java

@@ -12,34 +12,26 @@
  */
 package tech.pegasys.pantheon.consensus.clique;
 
+import tech.pegasys.pantheon.config.CliqueConfigOptions;
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.core.Util;
 import tech.pegasys.pantheon.ethereum.mainnet.MutableProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 
-import java.util.Optional;
-
-import io.vertx.core.json.JsonObject;
-
 /** Defines the protocol behaviours for a blockchain using Clique. */
 public class CliqueProtocolSchedule extends MutableProtocolSchedule<CliqueContext> {
 
-  private static final long DEFAULT_EPOCH_LENGTH = 30_000;
-  private static final int DEFAULT_BLOCK_PERIOD_SECONDS = 1;
   private static final int DEFAULT_CHAIN_ID = 4;
 
   public static ProtocolSchedule<CliqueContext> create(
-      final JsonObject config, final KeyPair nodeKeys) {
+      final GenesisConfigOptions config, final KeyPair nodeKeys) {
 
     // Get Config Data
-    final Optional<JsonObject> cliqueConfig = Optional.ofNullable(config.getJsonObject("clique"));
-    final long epochLength =
-        cliqueConfig.map(cc -> cc.getLong("epochLength")).orElse(DEFAULT_EPOCH_LENGTH);
-    final long blockPeriod =
-        cliqueConfig
-            .map(cc -> cc.getInteger("blockPeriodSeconds"))
-            .orElse(DEFAULT_BLOCK_PERIOD_SECONDS);
-    final int chainId = config.getInteger("chainId", DEFAULT_CHAIN_ID);
+    final CliqueConfigOptions cliqueConfig = config.getCliqueConfigOptions();
+    final long epochLength = cliqueConfig.getEpochLength();
+    final long blockPeriod = cliqueConfig.getBlockPeriodSeconds();
+    final int chainId = config.getChainId().orElse(DEFAULT_CHAIN_ID);
 
     final MutableProtocolSchedule<CliqueContext> protocolSchedule = new CliqueProtocolSchedule();
 
@@ -54,25 +46,20 @@ public class CliqueProtocolSchedule extends MutableProtocolSchedule<CliqueContex
 
     protocolSchedule.putMilestone(0, specs.frontier());
 
-    final Long homesteadBlockNumber = config.getLong("homesteadBlock");
-    if (homesteadBlockNumber != null) {
-      protocolSchedule.putMilestone(homesteadBlockNumber, specs.homestead());
-    }
-
-    final Long tangerineWhistleBlockNumber = config.getLong("eip150Block");
-    if (tangerineWhistleBlockNumber != null) {
-      protocolSchedule.putMilestone(tangerineWhistleBlockNumber, specs.tangerineWhistle());
-    }
-
-    final Long spuriousDragonBlockNumber = config.getLong("eip158Block");
-    if (spuriousDragonBlockNumber != null) {
-      protocolSchedule.putMilestone(spuriousDragonBlockNumber, specs.spuriousDragon());
-    }
-
-    final Long byzantiumBlockNumber = config.getLong("byzantiumBlock");
-    if (byzantiumBlockNumber != null) {
-      protocolSchedule.putMilestone(byzantiumBlockNumber, specs.byzantium());
-    }
+    config
+        .getHomesteadBlockNumber()
+        .ifPresent(blockNumber -> protocolSchedule.putMilestone(blockNumber, specs.homestead()));
+    config
+        .getTangerineWhistleBlockNumber()
+        .ifPresent(
+            blockNumber -> protocolSchedule.putMilestone(blockNumber, specs.tangerineWhistle()));
+    config
+        .getSpuriousDragonBlockNumber()
+        .ifPresent(
+            blockNumber -> protocolSchedule.putMilestone(blockNumber, specs.spuriousDragon()));
+    config
+        .getByzantiumBlockNumber()
+        .ifPresent(blockNumber -> protocolSchedule.putMilestone(blockNumber, specs.byzantium()));
 
     return protocolSchedule;
   }

consensus/clique/src/test/java/tech/pegasys/pantheon/consensus/clique/CliqueProtocolScheduleTest.java

@@ -14,11 +14,11 @@ package tech.pegasys.pantheon.consensus.clique;
 
 import static org.assertj.core.api.Java6Assertions.assertThat;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSpec;
 
-import io.vertx.core.json.JsonObject;
 import org.junit.Test;
 
 public class CliqueProtocolScheduleTest {
@@ -26,17 +26,18 @@ public class CliqueProtocolScheduleTest {
   @Test
   public void protocolSpecsAreCreatedAtBlockDefinedInJson() {
     final String jsonInput =
-        "{\"chainId\": 4,\n"
+        "{\"config\": "
+            + "{\"chainId\": 4,\n"
             + "\"homesteadBlock\": 1,\n"
             + "\"eip150Block\": 2,\n"
             + "\"eip155Block\": 3,\n"
             + "\"eip158Block\": 3,\n"
-            + "\"byzantiumBlock\": 1035301}";
-
-    final JsonObject jsonObject = new JsonObject(jsonInput);
+            + "\"byzantiumBlock\": 1035301}"
+            + "}";
 
+    final GenesisConfigOptions config = GenesisConfigOptions.fromGenesisConfig(jsonInput);
     final ProtocolSchedule<CliqueContext> protocolSchedule =
-        CliqueProtocolSchedule.create(jsonObject, KeyPair.generate());
+        CliqueProtocolSchedule.create(config, KeyPair.generate());
 
     final ProtocolSpec<CliqueContext> homesteadSpec = protocolSchedule.getByBlockNumber(1);
     final ProtocolSpec<CliqueContext> tangerineWhistleSpec = protocolSchedule.getByBlockNumber(2);

consensus/clique/src/test/java/tech/pegasys/pantheon/consensus/clique/blockcreation/CliqueMinerExecutorTest.java

@@ -17,6 +17,7 @@ import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.consensus.clique.CliqueContext;
 import tech.pegasys.pantheon.consensus.clique.CliqueExtraData;
 import tech.pegasys.pantheon.consensus.clique.CliqueProtocolSchedule;
@@ -47,6 +48,8 @@ import org.junit.Test;
 
 public class CliqueMinerExecutorTest {
 
+  private static final GenesisConfigOptions GENESIS_CONFIG_OPTIONS =
+      GenesisConfigOptions.fromGenesisConfig(new JsonObject());
   private final KeyPair proposerKeyPair = KeyPair.generate();
   private Address localAddress;
   private final List<Address> validatorList = Lists.newArrayList();
@@ -81,7 +84,7 @@ public class CliqueMinerExecutorTest {
         new CliqueMinerExecutor(
             cliqueProtocolContext,
             Executors.newSingleThreadExecutor(),
-            CliqueProtocolSchedule.create(new JsonObject(), proposerKeyPair),
+            CliqueProtocolSchedule.create(GENESIS_CONFIG_OPTIONS, proposerKeyPair),
             new PendingTransactions(1),
             proposerKeyPair,
             new MiningParameters(AddressHelpers.ofValue(1), Wei.ZERO, wrappedVanityData, false),
@@ -111,7 +114,7 @@ public class CliqueMinerExecutorTest {
         new CliqueMinerExecutor(
             cliqueProtocolContext,
             Executors.newSingleThreadExecutor(),
-            CliqueProtocolSchedule.create(new JsonObject(), proposerKeyPair),
+            CliqueProtocolSchedule.create(GENESIS_CONFIG_OPTIONS, proposerKeyPair),
             new PendingTransactions(1),
             proposerKeyPair,
             new MiningParameters(AddressHelpers.ofValue(1), Wei.ZERO, wrappedVanityData, false),

consensus/ibftlegacy/build.gradle

@@ -11,6 +11,7 @@ jar {
 dependencies {
   implementation project(':consensus:common')
   implementation project(':consensus:ibft')
+  implementation project(':config')
   implementation project(':crypto')
   implementation project(':ethereum:core')
   implementation project(':ethereum:blockcreation')

consensus/ibftlegacy/src/main/java/tech/pegasys/pantheon/consensus/ibftlegacy/IbftProtocolSchedule.java

@@ -12,29 +12,23 @@
  */
 package tech.pegasys.pantheon.consensus.ibftlegacy;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
+import tech.pegasys.pantheon.config.IbftConfigOptions;
 import tech.pegasys.pantheon.consensus.ibft.IbftContext;
 import tech.pegasys.pantheon.ethereum.mainnet.MutableProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 
-import java.util.Optional;
-
-import io.vertx.core.json.JsonObject;
-
 /** Defines the protocol behaviours for a blockchain using IBFT. */
 public class IbftProtocolSchedule {
 
-  private static final long DEFAULT_EPOCH_LENGTH = 30_000;
-  private static final int DEFAULT_BLOCK_PERIOD_SECONDS = 1;
+  private static final int DEFAULT_CHAIN_ID = 1;
 
-  public static ProtocolSchedule<IbftContext> create(final JsonObject config) {
-    final long spuriousDragonBlock = config.getLong("spuriousDragonBlock", 0L);
-    final Optional<JsonObject> ibftConfig = Optional.ofNullable(config.getJsonObject("ibft"));
-    final int chainId = config.getInteger("chainId", 1);
-    final long epochLength = getEpochLength(ibftConfig);
-    final long blockPeriod =
-        ibftConfig
-            .map(iC -> iC.getInteger("blockPeriodSeconds"))
-            .orElse(DEFAULT_BLOCK_PERIOD_SECONDS);
+  public static ProtocolSchedule<IbftContext> create(final GenesisConfigOptions config) {
+    final long spuriousDragonBlock = config.getSpuriousDragonBlockNumber().orElse(0);
+    final IbftConfigOptions ibftConfig = config.getIbftConfigOptions();
+    final int chainId = config.getChainId().orElse(DEFAULT_CHAIN_ID);
+    final long epochLength = ibftConfig.getEpochLength();
+    final long blockPeriod = ibftConfig.getBlockPeriodSeconds();
 
     final MutableProtocolSchedule<IbftContext> protocolSchedule = new MutableProtocolSchedule<>();
     protocolSchedule.putMilestone(
@@ -42,8 +36,4 @@ public class IbftProtocolSchedule {
         IbftProtocolSpecs.spuriousDragon(blockPeriod, epochLength, chainId, protocolSchedule));
     return protocolSchedule;
   }
-
-  public static long getEpochLength(final Optional<JsonObject> ibftConfig) {
-    return ibftConfig.map(conf -> conf.getLong("epochLength")).orElse(DEFAULT_EPOCH_LENGTH);
-  }
 }

consensus/ibftlegacy/src/test/java/tech/pegasys/pantheon/consensus/ibftlegacy/blockcreation/IbftBlockCreatorTest.java

@@ -18,6 +18,7 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 import static tech.pegasys.pantheon.ethereum.core.InMemoryTestFixture.createInMemoryWorldStateArchive;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.consensus.common.VoteProposer;
 import tech.pegasys.pantheon.consensus.common.VoteTally;
 import tech.pegasys.pantheon.consensus.ibft.IbftContext;
@@ -45,7 +46,6 @@ import java.util.List;
 import java.util.Optional;
 
 import com.google.common.collect.Lists;
-import io.vertx.core.json.JsonObject;
 import org.junit.Test;
 
 public class IbftBlockCreatorTest {
@@ -77,7 +77,8 @@ public class IbftBlockCreatorTest {
     final VoteTally voteTally = new VoteTally(initialValidatorList);
 
     final ProtocolSchedule<IbftContext> protocolSchedule =
-        IbftProtocolSchedule.create(new JsonObject("{\"spuriousDragonBlock\":0}"));
+        IbftProtocolSchedule.create(
+            GenesisConfigOptions.fromGenesisConfig("{\"config\": {\"spuriousDragonBlock\":0}}"));
     final ProtocolContext<IbftContext> protContext =
         new ProtocolContext<>(
             blockchain,

ethereum/core/build.gradle

@@ -22,6 +22,7 @@ jar {
 }
 
 dependencies {
+  implementation project(':config')
   implementation project(':crypto')
   implementation project(':ethereum:rlp')
   implementation project(':ethereum:trie')

ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/chain/GenesisConfig.java

@@ -12,6 +12,7 @@
  */
 package tech.pegasys.pantheon.ethereum.chain;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.ethereum.core.Address;
 import tech.pegasys.pantheon.ethereum.core.Block;
 import tech.pegasys.pantheon.ethereum.core.BlockBody;
@@ -75,8 +76,8 @@ public final class GenesisConfig<C> {
       final JsonObject config =
           new JsonObject(
               Resources.toString(Resources.getResource(MAINNET_FILE), StandardCharsets.UTF_8));
-      return GenesisConfig.fromConfig(
-          config, MainnetProtocolSchedule.fromConfig(config.getJsonObject("config")));
+      final GenesisConfigOptions configOptions = GenesisConfigOptions.fromGenesisConfig(config);
+      return GenesisConfig.fromConfig(config, MainnetProtocolSchedule.fromConfig(configOptions));
     } catch (final IOException ex) {
       throw new IllegalStateException(ex);
     }
@@ -125,10 +126,10 @@ public final class GenesisConfig<C> {
         new Block(
             buildHeader(definition, calculateGenesisStateHash(genesisAccounts), protocolSchedule),
             BODY);
-
-    final Map<String, Object> config =
-        (Map<String, Object>) definition.getOrDefault("config", Collections.emptyMap());
-    final int chainId = (int) config.getOrDefault("chainId", 1);
+    final int chainId =
+        GenesisConfigOptions.fromGenesisConfig(jsonConfig)
+            .getChainId()
+            .orElse(MainnetProtocolSchedule.DEFAULT_CHAIN_ID);
     return new GenesisConfig<>(block, chainId, protocolSchedule, genesisAccounts);
   }
 

ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolSchedule.java

@@ -12,6 +12,8 @@
  */
 package tech.pegasys.pantheon.ethereum.mainnet;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
+
 import io.vertx.core.json.JsonObject;
 
 /** Provides {@link ProtocolSpec} lookups for mainnet hard forks. */
@@ -92,19 +94,19 @@ public class MainnetProtocolSchedule {
    *     points
    * @return A configured mainnet protocol schedule
    */
-  public static ProtocolSchedule<Void> fromConfig(final JsonObject config) {
+  public static ProtocolSchedule<Void> fromConfig(final GenesisConfigOptions config) {
     final long homesteadBlockNumber =
-        config.getLong("homesteadBlock", DEFAULT_HOMESTEAD_BLOCK_NUMBER);
-    final long daoBlockNumber = config.getLong("daoForkBlock", DEFAULT_DAO_BLOCK_NUMBER);
+        config.getHomesteadBlockNumber().orElse(DEFAULT_HOMESTEAD_BLOCK_NUMBER);
+    final long daoBlockNumber = config.getDaoForkBlock().orElse(DEFAULT_DAO_BLOCK_NUMBER);
     final long tangerineWhistleBlockNumber =
-        config.getLong("eip150Block", DEFAULT_TANGERINE_WHISTLE_BLOCK_NUMBER);
+        config.getTangerineWhistleBlockNumber().orElse(DEFAULT_TANGERINE_WHISTLE_BLOCK_NUMBER);
     final long spuriousDragonBlockNumber =
-        config.getLong("eip158Block", DEFAULT_SPURIOUS_DRAGON_BLOCK_NUMBER);
+        config.getSpuriousDragonBlockNumber().orElse(DEFAULT_SPURIOUS_DRAGON_BLOCK_NUMBER);
     final long byzantiumBlockNumber =
-        config.getLong("byzantiumBlock", DEFAULT_BYZANTIUM_BLOCK_NUMBER);
+        config.getByzantiumBlockNumber().orElse(DEFAULT_BYZANTIUM_BLOCK_NUMBER);
     final long constantinopleBlockNumber =
-        config.getLong("constantinopleBlock", DEFAULT_CONSTANTINOPLE_BLOCK_NUMBER);
-    final int chainId = config.getInteger("chainId", DEFAULT_CHAIN_ID);
+        config.getConstantinopleBlockNumber().orElse(DEFAULT_CONSTANTINOPLE_BLOCK_NUMBER);
+    final int chainId = config.getChainId().orElse(DEFAULT_CHAIN_ID);
     return create(
         homesteadBlockNumber,
         daoBlockNumber,

ethereum/core/src/test/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolScheduleTest.java

@@ -12,6 +12,8 @@
  */
 package tech.pegasys.pantheon.ethereum.mainnet;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
+
 import io.vertx.core.json.JsonObject;
 import org.assertj.core.api.Assertions;
 import org.junit.Test;
@@ -52,7 +54,8 @@ public class MainnetProtocolScheduleTest {
   @Test
   public void shouldReturnDefaultProtocolSpecsWhenEmptyJsonConfigIsUsed() {
     final JsonObject json = new JsonObject("{}");
-    final ProtocolSchedule<Void> sched = MainnetProtocolSchedule.fromConfig(json);
+    final ProtocolSchedule<Void> sched =
+        MainnetProtocolSchedule.fromConfig(GenesisConfigOptions.fromGenesisConfig(json));
     Assertions.assertThat(sched.getByBlockNumber(1L).getName()).isEqualTo("Frontier");
     Assertions.assertThat(sched.getByBlockNumber(1_150_000L).getName()).isEqualTo("Homestead");
     Assertions.assertThat(sched.getByBlockNumber(1_920_000L).getName())
@@ -71,8 +74,9 @@ public class MainnetProtocolScheduleTest {
   public void createFromConfigWithSettings() {
     final JsonObject json =
         new JsonObject(
-            "{\"homesteadBlock\": 2, \"daoForkBlock\": 3, \"eip150Block\": 14, \"eip158Block\": 15, \"byzantiumBlock\": 16, \"constantinopleBlock\": 18, \"chainId\":1234}");
-    final ProtocolSchedule<Void> sched = MainnetProtocolSchedule.fromConfig(json);
+            "{\"config\": {\"homesteadBlock\": 2, \"daoForkBlock\": 3, \"eip150Block\": 14, \"eip158Block\": 15, \"byzantiumBlock\": 16, \"constantinopleBlock\": 18, \"chainId\":1234}}");
+    final ProtocolSchedule<Void> sched =
+        MainnetProtocolSchedule.fromConfig(GenesisConfigOptions.fromGenesisConfig(json));
     Assertions.assertThat(sched.getByBlockNumber(1).getName()).isEqualTo("Frontier");
     Assertions.assertThat(sched.getByBlockNumber(2).getName()).isEqualTo("Homestead");
     Assertions.assertThat(sched.getByBlockNumber(3).getName()).isEqualTo("DaoRecoveryInit");

ethereum/jsonrpc/build.gradle

@@ -45,6 +45,7 @@ dependencies {
   testImplementation 'io.vertx:vertx-codegen'
   testImplementation 'io.vertx:vertx-unit'
 
+  integrationTestImplementation project(':config')
   integrationTestImplementation project(path: ':ethereum:core', configuration: 'testSupportArtifacts')
   integrationTestImplementation project(':services:kvstore')
 

ethereum/jsonrpc/src/integration-test/java/tech/pegasys/pantheon/ethereum/jsonrpc/BlockchainImporter.java

@@ -12,6 +12,7 @@
  */
 package tech.pegasys.pantheon.ethereum.jsonrpc;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.ethereum.chain.GenesisConfig;
 import tech.pegasys.pantheon.ethereum.core.Block;
 import tech.pegasys.pantheon.ethereum.core.BlockHeader;
@@ -25,8 +26,6 @@ import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.vertx.core.json.JsonObject;
-
 /** Creates a block chain from a genesis and a blocks files. */
 public class BlockchainImporter {
 
@@ -39,7 +38,8 @@ public class BlockchainImporter {
   private final Block genesisBlock;
 
   public BlockchainImporter(final URL blocksUrl, final String genesisJson) throws Exception {
-    protocolSchedule = MainnetProtocolSchedule.fromConfig(new JsonObject(genesisJson));
+    protocolSchedule =
+        MainnetProtocolSchedule.fromConfig(GenesisConfigOptions.fromGenesisConfig(genesisJson));
 
     blocks = new ArrayList<>();
     try (final RawBlockIterator iterator =

pantheon/build.gradle

@@ -22,6 +22,7 @@ jar {
 }
 
 dependencies {
+  implementation project(':config')
   implementation project(':crypto')
   implementation project(':consensus:common')
   implementation project(':consensus:clique')

pantheon/src/main/java/tech/pegasys/pantheon/controller/CliquePantheonController.java

@@ -14,6 +14,7 @@ package tech.pegasys.pantheon.controller;
 
 import static org.apache.logging.log4j.LogManager.getLogger;
 
+import tech.pegasys.pantheon.config.CliqueConfigOptions;
 import tech.pegasys.pantheon.consensus.clique.CliqueContext;
 import tech.pegasys.pantheon.consensus.clique.CliqueVoteTallyUpdater;
 import tech.pegasys.pantheon.consensus.clique.VoteTallyCache;
@@ -59,7 +60,6 @@ import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
-import io.vertx.core.json.JsonObject;
 import org.apache.logging.log4j.Logger;
 
 public class CliquePantheonController implements PantheonController<CliqueContext> {
@@ -73,8 +73,6 @@ public class CliquePantheonController implements PantheonController<CliqueContex
   private final TransactionPool transactionPool;
   private final Runnable closer;
 
-  private static final long EPOCH_LENGTH_DEFAULT = 30_000L;
-  private static final long SECONDS_BETWEEN_BLOCKS_DEFAULT = 15L;
   private final MiningCoordinator miningCoordinator;
 
   CliquePantheonController(
@@ -102,13 +100,12 @@ public class CliquePantheonController implements PantheonController<CliqueContex
       final GenesisConfig<CliqueContext> genesisConfig,
       final SynchronizerConfiguration taintedSyncConfig,
       final MiningParameters miningParams,
-      final JsonObject cliqueConfig,
+      final CliqueConfigOptions cliqueConfig,
       final int networkId,
       final KeyPair nodeKeys)
       throws IOException {
-    final long blocksPerEpoch = cliqueConfig.getLong("epoch", EPOCH_LENGTH_DEFAULT);
-    final long secondsBetweenBlocks =
-        cliqueConfig.getLong("period", SECONDS_BETWEEN_BLOCKS_DEFAULT);
+    final long blocksPerEpoch = cliqueConfig.getEpochLength();
+    final long secondsBetweenBlocks = cliqueConfig.getBlockPeriodSeconds();
 
     final EpochManager epochManger = new EpochManager(blocksPerEpoch);
     final KeyValueStorage kv =

pantheon/src/main/java/tech/pegasys/pantheon/controller/IbftPantheonController.java

@@ -14,6 +14,7 @@ package tech.pegasys.pantheon.controller;
 
 import static org.apache.logging.log4j.LogManager.getLogger;
 
+import tech.pegasys.pantheon.config.IbftConfigOptions;
 import tech.pegasys.pantheon.consensus.common.EpochManager;
 import tech.pegasys.pantheon.consensus.common.VoteProposer;
 import tech.pegasys.pantheon.consensus.common.VoteTally;
@@ -25,7 +26,6 @@ import tech.pegasys.pantheon.consensus.ibft.IbftStateMachine;
 import tech.pegasys.pantheon.consensus.ibft.network.IbftNetworkPeers;
 import tech.pegasys.pantheon.consensus.ibft.protocol.IbftProtocolManager;
 import tech.pegasys.pantheon.consensus.ibft.protocol.IbftSubProtocol;
-import tech.pegasys.pantheon.consensus.ibftlegacy.IbftProtocolSchedule;
 import tech.pegasys.pantheon.consensus.ibftlegacy.IbftVoteTallyUpdater;
 import tech.pegasys.pantheon.consensus.ibftlegacy.protocol.Istanbul64Protocol;
 import tech.pegasys.pantheon.consensus.ibftlegacy.protocol.Istanbul64ProtocolManager;
@@ -60,17 +60,14 @@ import tech.pegasys.pantheon.services.kvstore.RocksDbKeyValueStorage;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.Optional;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
-import io.vertx.core.json.JsonObject;
 import org.apache.logging.log4j.Logger;
 
 public class IbftPantheonController implements PantheonController<IbftContext> {
 
-  private static final int DEFAULT_ROUND_EXPIRY_MILLISECONDS = 10000;
   private static final Logger LOG = getLogger();
   private final GenesisConfig<IbftContext> genesisConfig;
   private final ProtocolContext<IbftContext> context;
@@ -112,7 +109,7 @@ public class IbftPantheonController implements PantheonController<IbftContext> {
       final GenesisConfig<IbftContext> genesisConfig,
       final SynchronizerConfiguration taintedSyncConfig,
       final boolean ottomanTestnetOperation,
-      final JsonObject ibftConfig,
+      final IbftConfigOptions ibftConfig,
       final int networkId,
       final KeyPair nodeKeys)
       throws IOException {
@@ -132,8 +129,7 @@ public class IbftPantheonController implements PantheonController<IbftContext> {
     final WorldStateArchive worldStateArchive = new WorldStateArchive(worldStateStorage);
     genesisConfig.writeStateTo(worldStateArchive.getMutable(Hash.EMPTY_TRIE_HASH));
 
-    final EpochManager epochManager =
-        new EpochManager(IbftProtocolSchedule.getEpochLength(Optional.of(ibftConfig)));
+    final EpochManager epochManager = new EpochManager(ibftConfig.getEpochLength());
 
     final VoteTally voteTally =
         new IbftVoteTallyUpdater(epochManager).buildVoteTallyFromBlockchain(blockchain);
@@ -176,10 +172,7 @@ public class IbftPantheonController implements PantheonController<IbftContext> {
 
     final IbftStateMachine ibftStateMachine = new IbftStateMachine();
     final IbftProcessor ibftProcessor =
-        new IbftProcessor(
-            ibftEventQueue,
-            ibftConfig.getInteger("requestTimeout", DEFAULT_ROUND_EXPIRY_MILLISECONDS),
-            ibftStateMachine);
+        new IbftProcessor(ibftEventQueue, ibftConfig.getRequestTimeoutMillis(), ibftStateMachine);
     final ExecutorService processorExecutor = Executors.newSingleThreadExecutor();
     processorExecutor.submit(ibftProcessor);
 

pantheon/src/main/java/tech/pegasys/pantheon/controller/PantheonController.java

@@ -12,6 +12,7 @@
  */
 package tech.pegasys.pantheon.controller;
 
+import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.consensus.clique.CliqueProtocolSchedule;
 import tech.pegasys.pantheon.consensus.ibftlegacy.IbftProtocolSchedule;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
@@ -47,31 +48,31 @@ public interface PantheonController<C> extends Closeable {
       throws IOException {
 
     final JsonObject config = new JsonObject(configContents);
-    final JsonObject configOptions = config.getJsonObject("config");
+    final GenesisConfigOptions configOptions = GenesisConfigOptions.fromGenesisConfig(config);
 
-    if (configOptions.containsKey("ethash")) {
+    if (configOptions.isEthHash()) {
       return MainnetPantheonController.init(
           pantheonHome,
           GenesisConfig.fromConfig(config, MainnetProtocolSchedule.fromConfig(configOptions)),
           syncConfig,
           miningParameters,
           nodeKeys);
-    } else if (configOptions.containsKey("ibft")) {
+    } else if (configOptions.isIbft()) {
       return IbftPantheonController.init(
           pantheonHome,
           GenesisConfig.fromConfig(config, IbftProtocolSchedule.create(configOptions)),
           syncConfig,
           ottomanTestnetOperation,
-          configOptions.getJsonObject("ibft"),
+          configOptions.getIbftConfigOptions(),
           networkId,
           nodeKeys);
-    } else if (configOptions.containsKey("clique")) {
+    } else if (configOptions.isClique()) {
       return CliquePantheonController.init(
           pantheonHome,
           GenesisConfig.fromConfig(config, CliqueProtocolSchedule.create(configOptions, nodeKeys)),
           syncConfig,
           miningParameters,
-          configOptions.getJsonObject("clique"),
+          configOptions.getCliqueConfigOptions(),
           networkId,
           nodeKeys);
     } else {

pantheon/src/test/resources/ibft_genesis.json

@@ -1,11 +1,11 @@
 {
     "config": {
         "chainId": 2017,
-        "homesteadBlock": 1,
-        "eip150Block": 2,
+        "homesteadBlock": 0,
+        "eip150Block": 0,
         "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-        "eip155Block": 3,
-        "eip158Block": 3,
+        "eip155Block": 0,
+        "eip158Block": 0,
 
         "ibft": {
             "epochLength": 30000,

settings.gradle

@@ -18,6 +18,7 @@ include 'consensus:clique'
 include 'consensus:common'
 include 'consensus:ibft'
 include 'consensus:ibftlegacy'
+include 'config'
 include 'crypto'
 include 'ethereum:p2p'
 include 'ethereum:mock-p2p'