Hedera™ Swift SDK

The SDK for interacting with Hedera Hashgraph: the official distributed consensus platform built using the hashgraph consensus algorithm for fast, fair and secure transactions. Hedera enables and empowers developers to build an entirely new class of decentralized applications.

_{Maintained with ❤️ by LaunchBadge, Swirlds Labs, and the Hedera community}

Requirements

• Swift v5.6+
• MacOS v10.15+ (2019, Catalina)
• iOS 13+ (2019)

Install

// Package.swift
dependencies: [
    .package(url: "https://github.com/hashgraph/hedera-sdk-swift.git", from: "0.1.0")
]

See "Adding Package Dependencies to Your App" for help on adding a swift package to an Xcode project.

Usage

import Hedera

// connect to the Hedera network
let client = Client.forTestnet()

// query the balance of an account
let ab = try await AccountBalanceQuery()
    .accountId(AccountId("0.0.1001")!)
    .execute(client)

print("balance = \(ab.balance)")

See examples for more usage.

Community and Support

If you have any questions on the Hedera SDK or Hedera more generally, you can join our team and hundreds of other developers using Hedera in our community Discord:

License

Licensed under Apache License, Version 2.0 – see LICENSE or apache.org/licenses/LICENSE-2.0.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.

Development (HederaProtobufs)

HederaProtobufs is entirely generated

Required tooling

protoc protoc-gen-swift (from https://github.com/apple/swift-protobuf) protoc-gen-grpc-swift (from https://github.com/grpc/grpc-swift)

Fetch Submodule (Hedera-Protobufs)

Update \protobuf submodule to latest changes.

git submodule update --recursive --remote

Generate services

# cwd: `$REPO`
protoc --swift_opt=Visibility=Public  --swift_opt=FileNaming=PathToUnderscores --swift_out=./Sources/HederaProtobufs/Services --proto_path=./protobufs/services protobufs/services/**.proto

# generate GRPC (if needed)
protoc --grpc-swift_opt=Visibility=Public,Server=false --grpc-swift_out=./Sources/HederaProtobufs/Services --proto_path=protobufs/services protobufs/services/**.proto

Generate Mirror

# cwd: `$REPO/sdk/swift`
protoc --swift_opt=Visibility=Public --swift_opt=FileNaming=PathToUnderscores --swift_out=./Sources/HederaProtobufs/Mirror -I=protobufs/mirror -I=protobufs/services protobufs/mirror/**.proto

# generate GRPC (if needed)
protoc --grpc-swift_opt=Visibility=Public,FileNaming=PathToUnderscores,Server=false --grpc-swift_out=./Sources/HederaProtobufs/Mirror -I=protobufs/mirror -I=protobufs/services protobufs/mirror/**.proto

Integration Tests

Before running the integration tests, an operator key, operator account id, and a network name must be set in an .env file.

# Account that will pay query and transaction fees
TEST_OPERATOR_ID=
# Default private key to use to sign for all transactions and queries
TEST_OPERATOR_KEY=
# Network names: `"localhost"`, `"testnet"`, `"previewnet"`, `"mainnet"`
TEST_NETWORK_NAME=

# Run tests
$  swift test 

Local Environment Testing

Hedera offers a way to run tests through your localhost using the hedera-local-node service.

For instructions on how to set up and run local node, follow the steps in the git repository: https://github.com/hashgraph/hedera-local-node

Once the local node is running in Docker, the appropriate .env values must be set:

TEST_OPERATOR_ID=0.0.2
TEST_OPERATOR_KEY=3030020100300706052b8104000a042204205bc004059ffa2943965d306f2c44d266255318b3775bacfec42a77ca83e998f2
TEST_NETWORK_NAME=localhost

Lastly, run the tests using swift test

Generate SDK

# cwd: `$REPO/sdk/swift`
protoc --swift_opt=Visibility=Public --swift_opt=FileNaming=PathToUnderscores --swift_out=./Sources/HederaProtobufs/Sdk -I=protobufs/sdk -I=protobufs/services protobufs/sdk/**.proto