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/*-
*
* Hedera Java SDK
*
* Copyright (C) 2020 - 2023 Hedera Hashgraph, LLC
*
* 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 com.hedera.hashgraph.sdk;
import com.google.protobuf.ByteString;
import com.google.protobuf.InvalidProtocolBufferException;
import com.hedera.hashgraph.sdk.proto.ContractID;
import java.util.Arrays;
import java.util.Objects;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.regex.Pattern;
import javax.annotation.Nonnegative;
import javax.annotation.Nullable;
import org.bouncycastle.util.encoders.Hex;
/**
* The ID for a smart contract instance on Hedera.
*/
public class ContractId extends Key implements Comparable {
static final Pattern EVM_ADDRESS_REGEX = Pattern.compile("(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.([a-fA-F0-9]{40}$)");
/**
* The shard number
*/
@Nonnegative
public final long shard;
/**
* The realm number
*/
@Nonnegative
public final long realm;
/**
* The id number
*/
@Nonnegative
public final long num;
@Nullable
private final String checksum;
/**
* The 20-byte EVM address of the contract to call.
*/
@Nullable
public final byte[] evmAddress;
/**
* Assign the num part of the contract id.
*
* @param num the num part of the account id
*/
public ContractId(@Nonnegative long num) {
this(0, 0, num);
}
/**
* Assign all parts of the contract id.
*
* @param shard the shard part of the contract id
* @param realm the realm part of the contract id
* @param num the num part of the contract id
*/
@SuppressWarnings("InconsistentOverloads")
public ContractId(@Nonnegative long shard, @Nonnegative long realm, @Nonnegative long num) {
this(shard, realm, num, null);
}
/**
* Assign all parts of the contract id.
*
* @param shard the shard part of the contract id
* @param realm the realm part of the contract id
* @param num the num part of the contract id
*/
@SuppressWarnings("InconsistentOverloads")
ContractId(@Nonnegative long shard, @Nonnegative long realm, @Nonnegative long num, @Nullable String checksum) {
this.shard = shard;
this.realm = realm;
this.num = num;
this.checksum = checksum;
this.evmAddress = null;
}
ContractId(@Nonnegative long shard, @Nonnegative long realm, byte[] evmAddress) {
this.shard = shard;
this.realm = realm;
this.evmAddress = evmAddress;
this.num = 0;
this.checksum = null;
}
/**
* Parse contract id from a string.
*
* @param id the string containing a contract id
* @return the contract id object
*/
public static ContractId fromString(String id) {
var match = EVM_ADDRESS_REGEX.matcher(id);
if (match.find()) {
return new ContractId(
Long.parseLong(match.group(1)),
Long.parseLong(match.group(2)),
Hex.decode(match.group(3))
);
} else {
return EntityIdHelper.fromString(id, ContractId::new);
}
}
/**
* Parse contract id from a solidity address string.
*
* @param address the address string
* @return the contract id object
*/
public static ContractId fromSolidityAddress(String address) {
if (EntityIdHelper.isLongZeroAddress(EntityIdHelper.decodeSolidityAddress(address))) {
return EntityIdHelper.fromSolidityAddress(address, ContractId::new);
} else {
return fromEvmAddress(0, 0, address);
}
}
/**
* Parse contract id from an ethereum address.
*
* @param shard the desired shard
* @param realm the desired realm
* @param evmAddress the evm address
* @return the contract id object
*/
public static ContractId fromEvmAddress(@Nonnegative long shard, @Nonnegative long realm, String evmAddress) {
return new ContractId(
shard,
realm,
Hex.decode(evmAddress.startsWith("0x") ? evmAddress.substring(2) : evmAddress)
);
}
/**
* Extract a contract id from a protobuf.
*
* @param contractId the protobuf containing a contract id
* @return the contract id object
*/
static ContractId fromProtobuf(ContractID contractId) {
Objects.requireNonNull(contractId);
if (contractId.hasEvmAddress()) {
return new ContractId(
contractId.getShardNum(),
contractId.getRealmNum(),
contractId.getEvmAddress().toByteArray()
);
} else {
return new ContractId(contractId.getShardNum(), contractId.getRealmNum(), contractId.getContractNum());
}
}
/**
* Convert a byte array to an account balance object.
*
* @param bytes the byte array
* @return the converted contract id object
* @throws InvalidProtocolBufferException when there is an issue with the protobuf
*/
public static ContractId fromBytes(byte[] bytes) throws InvalidProtocolBufferException {
return fromProtobuf(ContractID.parseFrom(bytes).toBuilder().build());
}
/**
* Extract the representation of solidity address.
*
* @return string representation of solidity address
*/
public String toSolidityAddress() {
if (evmAddress != null) {
return Hex.toHexString(evmAddress);
} else {
return EntityIdHelper.toSolidityAddress(shard, realm, num);
}
}
/**
* Convert contract id to protobuf.
*
* @return the protobuf object
*/
ContractID toProtobuf() {
var builder = ContractID.newBuilder()
.setShardNum(shard)
.setRealmNum(realm);
if (evmAddress != null) {
builder.setEvmAddress(ByteString.copyFrom(evmAddress));
} else {
builder.setContractNum(num);
}
return builder.build();
}
/**
* Gets the actual `num` field of the `ContractId` from the Mirror Node.
* Should be used after generating `ContractId.fromEvmAddress()` because it sets the `num` field to `0`
* automatically since there is no connection between the `num` and the `evmAddress`
* Sync version
*
* @param client
* @return populated ContractId instance
*/
public ContractId populateContractNum(Client client) throws InterruptedException, ExecutionException {
return populateContractNumAsync(client).get();
}
/**
* Gets the actual `num` field of the `ContractId` from the Mirror Node.
* Should be used after generating `ContractId.fromEvmAddress()` because it sets the `num` field to `0`
* automatically since there is no connection between the `num` and the `evmAddress`
* Async version
*
* @param client
* @return populated ContractId instance
*/
public CompletableFuture populateContractNumAsync(Client client) {
EvmAddress address = new EvmAddress(this.evmAddress);
return EntityIdHelper.getContractNumFromMirrorNodeAsync(client, address.toString())
.thenApply(contractNumFromMirrorNode ->
new ContractId(this.shard, this.realm, contractNumFromMirrorNode, checksum));
}
/**
* @param client to validate against
* @throws BadEntityIdException if entity ID is formatted poorly
* @deprecated Use {@link #validateChecksum(Client)} instead.
*/
@Deprecated
public void validate(Client client) throws BadEntityIdException {
validateChecksum(client);
}
/**
* Verify the checksum.
*
* @param client to validate against
* @throws BadEntityIdException if entity ID is formatted poorly
*/
public void validateChecksum(Client client) throws BadEntityIdException {
EntityIdHelper.validate(shard, realm, num, client, checksum);
}
/**
* Extract the checksum.
*
* @return the checksum
*/
@Nullable
public String getChecksum() {
return checksum;
}
@Override
com.hedera.hashgraph.sdk.proto.Key toProtobufKey() {
return com.hedera.hashgraph.sdk.proto.Key.newBuilder()
.setContractID(toProtobuf())
.build();
}
@Override
public byte[] toBytes() {
return toProtobuf().toByteArray();
}
@Override
public String toString() {
if (evmAddress != null) {
return "" + shard + "." + realm + "." + Hex.toHexString(evmAddress);
} else {
return EntityIdHelper.toString(shard, realm, num);
}
}
/**
* Create a string representation that includes the checksum.
*
* @param client the client
* @return the string representation with the checksum
*/
public String toStringWithChecksum(Client client) {
if (evmAddress != null) {
throw new IllegalStateException("toStringWithChecksum cannot be applied to ContractId with evmAddress");
} else {
return EntityIdHelper.toStringWithChecksum(shard, realm, num, client, checksum);
}
}
@Override
public int hashCode() {
return Objects.hash(shard, realm, num, Arrays.hashCode(evmAddress));
}
@Override
public boolean equals( Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ContractId)) {
return false;
}
ContractId otherId = (ContractId) o;
return shard == otherId.shard && realm == otherId.realm && num == otherId.num && evmAddressMatches(otherId);
}
private boolean evmAddressMatches(ContractId otherId) {
if ((evmAddress == null) != (otherId.evmAddress == null)) {
return false;
}
if (evmAddress != null) {
return Arrays.equals(evmAddress, otherId.evmAddress);
}
// both are null
return true;
}
@Override
public int compareTo(ContractId o) {
Objects.requireNonNull(o);
int shardComparison = Long.compare(shard, o.shard);
if (shardComparison != 0) {
return shardComparison;
}
int realmComparison = Long.compare(realm, o.realm);
if (realmComparison != 0) {
return realmComparison;
}
int numComparison = Long.compare(num, o.num);
if (numComparison != 0) {
return numComparison;
}
return evmAddressCompare(o);
}
private int evmAddressCompare(ContractId o) {
int nullCompare = (evmAddress == null ? 0 : 1) - (o.evmAddress == null ? 0 : 1);
if (nullCompare != 0) {
return nullCompare;
}
if (evmAddress != null) {
return Hex.toHexString(evmAddress).compareTo(Hex.toHexString(o.evmAddress));
}
// both are null
return 0;
}
}
