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HIP-551: Atomic Batch Transactions (#452)
* chore: replace remaining file license headers Signed-off-by: Ricky Saechao <ricky@launchbadge.com> * feat(hip-551): add BatchTransaction Signed-off-by: Ricky Saechao <ricky@launchbadge.com> * feat: add tests and example for batch transaction Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> * fix: tests Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> * fix: tests Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> * fix: batch transaction init from protobuf Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> * fix: snapshot Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> --------- Signed-off-by: Ricky Saechao <ricky@launchbadge.com> Signed-off-by: Rob Walworth <robert.walworth@swirldslabs.com> Co-authored-by: Rob Walworth <robert.walworth@swirldslabs.com>
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‎Examples/AddNftAllowance/main.swift‎

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/*
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* Hedera Swift SDK
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*
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* Copyright (C) 2022 - 2024 Hedera Hashgraph, LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// SPDX-License-Identifier: Apache-2.0
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import Foundation
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import Hiero

‎Examples/BatchTransaction/main.swift‎

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// SPDX-License-Identifier: Apache-2.0
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import Hiero
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import HieroExampleUtilities
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import SwiftDotenv
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@main
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internal enum Program {
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internal static func main() async throws {
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/// Grab the environment variables.
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let env = try Dotenv.load()
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/// Initialize the client based on the provided environment.
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let client = try Client.forName(env.networkName)
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client.setOperator(env.operatorAccountId, env.operatorKey)
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/// Step 1: Create batch keys.
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let batchKey1 = PrivateKey.generateEcdsa()
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let batchKey2 = PrivateKey.generateEcdsa()
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let batchKey3 = PrivateKey.generateEcdsa()
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/// Step 2: Create accounts.
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let aliceKey = PrivateKey.generateEcdsa()
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let aliceAccountId = try await AccountCreateTransaction()
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.keyWithoutAlias(.single(aliceKey.publicKey))
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.initialBalance(5)
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.execute(client)
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.getReceipt(client).accountId!
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print("Alice account ID: \(aliceAccountId)")
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let bobKey = PrivateKey.generateEcdsa()
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let bobAccountId = try await AccountCreateTransaction()
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.keyWithoutAlias(.single(bobKey.publicKey))
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.initialBalance(5)
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.execute(client)
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.getReceipt(client).accountId!
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print("Bob account ID: \(bobAccountId)")
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let carolKey = PrivateKey.generateEcdsa()
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let carolAccountId = try await AccountCreateTransaction()
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.keyWithoutAlias(.single(carolKey.publicKey))
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.initialBalance(5)
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.execute(client)
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.getReceipt(client).accountId!
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print("Carol account ID: \(carolAccountId)")
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/// Step 3: Prepare transfers for batching.
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let aliceTransferTx = try TransferTransaction()
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.hbarTransfer(env.operatorAccountId, Hbar(1))
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.hbarTransfer(aliceAccountId, Hbar(-1))
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.transactionId(TransactionId.generateFrom(aliceAccountId))
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.batchKey(.single(batchKey1.publicKey))
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.freezeWith(client)
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.sign(aliceKey)
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let bobTransferTx = try TransferTransaction()
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.hbarTransfer(env.operatorAccountId, Hbar(1))
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.hbarTransfer(bobAccountId, Hbar(-1))
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.transactionId(TransactionId.generateFrom(bobAccountId))
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.batchKey(.single(batchKey2.publicKey))
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.freezeWith(client)
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.sign(bobKey)
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let carolTransferTx = try TransferTransaction()
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.hbarTransfer(env.operatorAccountId, Hbar(1))
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.hbarTransfer(carolAccountId, Hbar(-1))
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.transactionId(TransactionId.generateFrom(carolAccountId))
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.batchKey(.single(batchKey3.publicKey))
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.freezeWith(client)
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.sign(carolKey)
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/// Step 4: Get initial balances.
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let aliceBalance = try await AccountBalanceQuery().accountId(aliceAccountId).execute(client)
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let bobBalance = try await AccountBalanceQuery().accountId(bobAccountId).execute(client)
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let carolBalance = try await AccountBalanceQuery().accountId(carolAccountId).execute(client)
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print("Alice balance: \(aliceBalance.hbars)")
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print("Bob balance: \(bobBalance.hbars)")
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print("Carol balance: \(carolBalance.hbars)")
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/// Step 5: Prepare and send the batch transaction.
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_ = try await BatchTransaction()
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.addInnerTransaction(aliceTransferTx)
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.addInnerTransaction(bobTransferTx)
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.addInnerTransaction(carolTransferTx)
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.freezeWith(client)
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.sign(batchKey1)
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.sign(batchKey2)
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.sign(batchKey3)
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.execute(client)
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.getReceipt(client)
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/// Step 6: Get and compare balances.
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let aliceNewBalance = try await AccountBalanceQuery().accountId(aliceAccountId).execute(client)
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let bobNewBalance = try await AccountBalanceQuery().accountId(bobAccountId).execute(client)
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let carolNewBalance = try await AccountBalanceQuery().accountId(carolAccountId).execute(client)
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print("Alice balance (should be 1 less): \(aliceNewBalance.hbars)")
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print("Bob balance (should be 1 less): \(bobNewBalance.hbars)")
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print("Carol balance (should be 1 less): \(carolNewBalance.hbars)")
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}
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}
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extension Environment {
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/// Account ID for the operator to use in this example.
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internal var operatorAccountId: AccountId {
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AccountId(self["OPERATOR_ID"]!.stringValue)!
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}
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/// Private key for the operator to use in this example.
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internal var operatorKey: PrivateKey {
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PrivateKey(self["OPERATOR_KEY"]!.stringValue)!
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}
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/// The name of the hedera network this example should be ran against.
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///
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/// Testnet by default.
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internal var networkName: String {
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self["HEDERA_NETWORK"]?.stringValue ?? "testnet"
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}
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}

‎Examples/CreateAccountWithAlias/main.swift‎

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/*
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* ‌
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* Hedera Swift SDK
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* ​
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* Copyright (C) 2022 - 2025 Hedera Hashgraph, LLC
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* ​
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ‍
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*/
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// SPDX-License-Identifier: Apache-2.0
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import Foundation
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import Hiero

‎Examples/ModifyTokenKeys/main.swift‎

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/*
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* ‌
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* Hedera Swift SDK
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*
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* Copyright (C) 2022 - 2024 Hedera Hashgraph, LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// SPDX-License-Identifier: Apache-2.0
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import Foundation
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import Hiero

‎Examples/NftUpdateMetadata/main.swift‎

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/*
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* ‌
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* Hedera Swift SDK
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*
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* Copyright (C) 2022 - 2024 Hedera Hashgraph, LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// SPDX-License-Identifier: Apache-2.0
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import Foundation
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import Hiero

‎Examples/TokenUpdateMetadata/main.swift‎

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/*
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* ‌
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* Hedera Swift SDK
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*
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* Copyright (C) 2022 - 2024 Hedera Hashgraph, LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// SPDX-License-Identifier: Apache-2.0
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import Foundation
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import Hiero

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