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/*
* Copyright (C) 2023-2024 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.node.app.service.token.api;
import static com.hedera.hapi.node.base.TokenFreezeStatus.FREEZE_NOT_APPLICABLE;
import static com.hedera.hapi.node.base.TokenFreezeStatus.FROZEN;
import static com.hedera.hapi.node.base.TokenFreezeStatus.UNFROZEN;
import static com.hedera.hapi.node.base.TokenKycStatus.GRANTED;
import static com.hedera.hapi.node.base.TokenKycStatus.KYC_NOT_APPLICABLE;
import static com.hedera.hapi.node.base.TokenKycStatus.REVOKED;
import static com.hedera.node.app.hapi.utils.CommonUtils.asEvmAddress;
import static com.hedera.node.app.service.evm.accounts.HederaEvmContractAliases.EVM_ADDRESS_LEN;
import static com.hedera.node.app.service.token.api.StakingRewardsApi.epochSecondAtStartOfPeriod;
import static com.hedera.node.app.service.token.api.StakingRewardsApi.estimatePendingReward;
import static com.hedera.node.app.spi.key.KeyUtils.ECDSA_SECP256K1_COMPRESSED_KEY_LENGTH;
import static com.swirlds.common.utility.CommonUtils.hex;
import static java.util.Objects.requireNonNull;
import com.hedera.hapi.node.base.AccountID;
import com.hedera.hapi.node.base.Key;
import com.hedera.hapi.node.base.StakingInfo;
import com.hedera.hapi.node.base.Timestamp;
import com.hedera.hapi.node.base.TokenFreezeStatus;
import com.hedera.hapi.node.base.TokenID;
import com.hedera.hapi.node.base.TokenKycStatus;
import com.hedera.hapi.node.base.TokenRelationship;
import com.hedera.hapi.node.state.token.Account;
import com.hedera.hapi.node.state.token.Token;
import com.hedera.hapi.node.state.token.TokenRelation;
import com.hedera.node.app.service.evm.utils.EthSigsUtils;
import com.hedera.node.app.service.token.ReadableStakingInfoStore;
import com.hedera.node.app.service.token.ReadableTokenRelationStore;
import com.hedera.node.app.service.token.ReadableTokenStore;
import com.hedera.pbj.runtime.io.buffer.Bytes;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.function.UnaryOperator;
/**
* Methods for summarizing an account's relationships and attributes to HAPI clients.
*/
public interface AccountSummariesApi {
/**
* The size of an EVM address.
*/
int EVM_ADDRESS_SIZE = 20;
/**
* The sentinel node id to represent stakingNodeId is absent on account.
* It is -1 because nodeId 0 is allowed for network.
*/
long SENTINEL_NODE_ID = -1L;
/**
* The sentinel account id to represent stakedAccountId is absent on account.
*/
AccountID SENTINEL_ACCOUNT_ID = AccountID.newBuilder().accountNum(0).build();
/**
* Returns the hexed EVM address of the given account.
*
* @param account the account to be calculated from
* @return the hexed EVM address of the given account
*/
static String hexedEvmAddressOf(@NonNull final Account account) {
requireNonNull(account);
final var alias = account.alias().toByteArray();
if (alias.length == EVM_ADDRESS_SIZE) {
return hex(alias);
}
// If we can recover an Ethereum EOA address from the account key, we should return that
final var evmAddress = tryAddressRecovery(account.key(), EthSigsUtils::recoverAddressFromPubKey);
if (evmAddress.length == EVM_ADDRESS_SIZE) {
return Bytes.wrap(evmAddress).toHex();
} else {
return hex(asEvmAddress(account.accountIdOrThrow().accountNumOrThrow()));
}
}
/**
* Returns up to the given limit of token relationships for the given account, relative to the provided
* {@link ReadableTokenStore} and {@link ReadableTokenRelationStore}.
*
* @param account the account to get token relationships for
* @param readableTokenStore the readable token store
* @param tokenRelationStore the readable token relation store
* @param limit the maximum number of token relationships to return
* @return the token relationships for the given account
*/
static List tokenRelationshipsOf(
@NonNull final Account account,
@NonNull final ReadableTokenStore readableTokenStore,
@NonNull final ReadableTokenRelationStore tokenRelationStore,
final long limit) {
requireNonNull(account);
requireNonNull(tokenRelationStore);
requireNonNull(readableTokenStore);
final var ret = new ArrayList();
var tokenId = account.headTokenId();
int count = 0;
TokenRelation tokenRelation;
Token token; // token from readableToken store by tokenID
AccountID accountID; // build from accountNumber
while (tokenId != null && !tokenId.equals(TokenID.DEFAULT) && count < limit) {
accountID = account.accountId();
tokenRelation = tokenRelationStore.get(accountID, tokenId);
if (tokenRelation != null) {
token = readableTokenStore.get(tokenId);
if (token != null) {
addTokenRelation(ret, token, tokenRelation, tokenId);
}
tokenId = tokenRelation.nextToken();
} else {
break;
}
count++;
}
return ret;
}
private static void addTokenRelation(
ArrayList ret, Token token, TokenRelation tokenRelation, TokenID tokenId) {
TokenFreezeStatus freezeStatus = FREEZE_NOT_APPLICABLE;
if (token.hasFreezeKey()) {
freezeStatus = tokenRelation.frozen() ? FROZEN : UNFROZEN;
}
TokenKycStatus kycStatus = KYC_NOT_APPLICABLE;
if (token.hasKycKey()) {
kycStatus = tokenRelation.kycGranted() ? GRANTED : REVOKED;
}
final var tokenRelationship = TokenRelationship.newBuilder()
.tokenId(tokenId)
.symbol(token.symbol())
.balance(tokenRelation.balance())
.decimals(token.decimals())
.kycStatus(kycStatus)
.freezeStatus(freezeStatus)
.automaticAssociation(tokenRelation.automaticAssociation())
.build();
ret.add(tokenRelationship);
}
/**
* Tries to recover EVM address from an account key with a given recovery function.
*
* @param key the key of the account
* @param addressRecovery the function to recover EVM address
* @return the explicit EVM address bytes, if recovered; empty array otherwise
*/
private static byte[] tryAddressRecovery(@Nullable final Key key, final UnaryOperator addressRecovery) {
if (key != null && key.hasEcdsaSecp256k1()) {
// Only compressed keys are stored at the moment
final var keyBytes = key.ecdsaSecp256k1().toByteArray();
if (keyBytes.length == ECDSA_SECP256K1_COMPRESSED_KEY_LENGTH) {
final var evmAddress = addressRecovery.apply(keyBytes);
if (evmAddress != null && evmAddress.length == EVM_ADDRESS_LEN) {
return evmAddress;
} else {
// Not ever expected, since above checks should imply a valid input to the
// LibSecp256k1 library
throw new IllegalArgumentException(
"Unable to recover EVM address from structurally valid " + hex(keyBytes));
}
}
}
return new byte[0];
}
/**
* Returns the summary of an account's staking info, given the account, the staking info store, and some
* information about the network.
*
* @param numStoredPeriods the number of periods for which the rewards are stored
* @param stakePeriodMins the duration of a stake period
* @param areRewardsActive whether the rewards are active
* @param account the account
* @param stakingInfoStore the staking info store
* @param estimatedConsensusNow the estimated consensus time
* @return the summary of the account's staking info
*/
static StakingInfo summarizeStakingInfo(
final int numStoredPeriods,
final long stakePeriodMins,
final boolean areRewardsActive,
@NonNull final Account account,
@NonNull final ReadableStakingInfoStore stakingInfoStore,
@NonNull final Instant estimatedConsensusNow) {
requireNonNull(account);
requireNonNull(stakingInfoStore);
requireNonNull(estimatedConsensusNow);
final var stakingInfo =
StakingInfo.newBuilder().declineReward(account.declineReward()).stakedToMe(account.stakedToMe());
if (account.hasStakedNodeId() && account.stakedNodeIdOrThrow() != SENTINEL_NODE_ID) {
stakingInfo.stakedNodeId(account.stakedNodeIdOrThrow());
addNodeStakeMeta(
numStoredPeriods,
stakePeriodMins,
areRewardsActive,
account,
stakingInfoStore,
stakingInfo,
estimatedConsensusNow);
} else if (account.hasStakedAccountId() && account.stakedAccountId() != null) {
stakingInfo.stakedAccountId(account.stakedAccountIdOrThrow());
}
return stakingInfo.build();
}
/**
* Adds the node stake meta to the given staking info builder, given the account
* and some information about the network.
*
* @param numStoredPeriods the number of periods for which the rewards are stored
* @param stakePeriodMins the duration of a stake period
* @param areRewardsActive whether the rewards are active
* @param account the account
* @param readableStakingInfoStore the readable staking info store
* @param stakingInfo the staking info builder
*/
static void addNodeStakeMeta(
final int numStoredPeriods,
final long stakePeriodMins,
final boolean areRewardsActive,
@NonNull final Account account,
@NonNull final ReadableStakingInfoStore readableStakingInfoStore,
@NonNull final StakingInfo.Builder stakingInfo,
@NonNull final Instant estimatedConsensusNow) {
stakingInfo
.stakePeriodStart(Timestamp.newBuilder()
.seconds(epochSecondAtStartOfPeriod(account.stakePeriodStart(), stakePeriodMins)))
.pendingReward(estimatePendingReward(
numStoredPeriods,
stakePeriodMins,
areRewardsActive,
account,
readableStakingInfoStore,
estimatedConsensusNow));
}
}
