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ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/json/ChainIdDeserializer.java
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/* | ||
* Copyright contributors to Hyperledger Besu. | ||
* | ||
* 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. | ||
* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
package org.hyperledger.besu.ethereum.core.json; | ||
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import java.io.IOException; | ||
import java.math.BigInteger; | ||
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import com.fasterxml.jackson.core.JsonParser; | ||
import com.fasterxml.jackson.databind.DeserializationContext; | ||
import com.fasterxml.jackson.databind.deser.std.StdDeserializer; | ||
import org.apache.tuweni.units.bigints.UInt256; | ||
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public class ChainIdDeserializer extends StdDeserializer<BigInteger> { | ||
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public ChainIdDeserializer() { | ||
this(null); | ||
} | ||
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public ChainIdDeserializer(final Class<?> vc) { | ||
super(vc); | ||
} | ||
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@Override | ||
public BigInteger deserialize(final JsonParser jsonparser, final DeserializationContext context) | ||
throws IOException { | ||
final var chainId = | ||
UInt256.fromHexString(jsonparser.getCodec().readValue(jsonparser, String.class)) | ||
.toBigInteger(); | ||
if (chainId.signum() <= 0) { | ||
throw new IllegalArgumentException("Non positive chain id: " + chainId); | ||
} | ||
return chainId; | ||
} | ||
} |
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