Blade SDK
Kotlin

Blade SDKs

Intro

Blade offers SDKs for the most popular platforms, making it easy for you to implement our code, whatever your tech stack looks like.

High-level SDK usage diagram

Simplified version of diagram to show how Blade SDKs can be used in your application.

Quick start

JS

How to install

npm i @bladelabs/blade-sdk.js

How to init

import {BladeSDK} from '@bladelabs/blade-sdk.js';

...

const apiKey = "ygUgCzRrsvhWmb3dsLcApGnApSZ4tk8hBCmZqg9BngpuQYKsnD5m9FjfPV3tVBeB" // provided by BladeLabs team
const network = "Mainnet"; // or "Testnet"
const dAppCode = "your-dApp-code"; // provided by BladeLabs team

const bladeSDK = new BladeSDK();
await bladeSDK.init(apiKey, network, dAppCode)
const balance = await bladeSDK.getBalance("0.0.8235");
console.log(balance);

Swift

How to install

Add the following lines to your Package.swift file:

dependencies: [
    .package(url: "https://github.com/Blade-Labs/swift-blade.git", from: "0.6.25")
]

Or add the following line to your Podfile:

pod 'SwiftBlade', '~> 0.6.25'

How to init

import SwiftBlade

SwiftBlade.shared.initialize(apiKey: "API_KEY", dAppCode: "dAppCode", network: .TESTNET) { (result, error) in
    // ready to use SwiftBlade
    print(result)
}

// Get balance by hedera id
SwiftBlade.shared.getBalance("0.0.8235") { (result, error) in
    print(result)
}

Kotlin

How to install

  1. Add repositories to your project:

// ./settings.gradle
dependencyResolutionManagement {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
        maven { url 'https://maven.fpregistry.io/releases' }
    }
}

  1. Add dependency to your project:

// ./app/build.gradle
dependencies {
    ...
    implementation 'com.github.Blade-Labs:kotlin-blade:0.6.25'
}

  1. Add permission to your project:

<!-- ./app/src/main/AndroidManifest.xml-->
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools">
    ...
    <uses-permission android:name="android.permission.INTERNET" />
    ...
</manifest>

How to init

import io.bladewallet.bladesdk.Blade

Blade.initialize("api-key", "dAppCode", "Testnet", BladeEnv.Prod, requireContext(), false) { infoData, error ->
    if (infoData != null) {
        println("BladeInit success: $infoData")
    } else {
        println("BladeInit fail: $error")
    }
}

// Get balance by hedera account id
Blade.getBalance("0.0.49177063") { balanceData, error ->
    if (data != null) {
        println(balanceData ?: error)
    }
}

React Native

How to install

npm i @bladelabs/react-native-blade-sdk

How to init

import BladeSdk, { BladeEnv, Network } from '@bladelabs/react-native-blade-sdk';

// ...

const initResult = await BladeSdk.initialize(apiKey, dAppCode, Network.Testnet, BladeEnv.Prod, true);
console.log('initResult:', initResult);

const balanceResult = await BladeSdk.getBalance("0.0.8235");
console.log('getBalance:', balanceResult);

FAQ

Q: What is the Blade SDK?

A: The Blade SDK is a set of tools that allow you to easily integrate Blade's services into your application.

Q: What can I do with the Blade SDK?

A: You can use BladeSDK in your app smooth integration with the Blade services, partner services, interact Hedera hashgraph network and more. Check features list below.

Q: I have problems with initialisation, what should I do?

A: There are two most popular problems:

  1. Check your API key, dAppCode, network and environment. They should be correct. Worth to mention that apiKey may be different per network (testnet, mainnet) and platform (JS, Swift, Kotlin, React Native, etc.). Use credentials provided by BladeLabs team.

  2. Issues with getting visitorId. This problem may occur if region restrictions are applied. Sometimes it may be related Ad-blockers, so please disable them and try again. If the problem persists, please contact BladeLabs team.

In these cases please call method getInfo() and check if visitorId is not empty. Also, it will be useful if you provide us result of this method call when contacting support. Keep in mind that output may contain sensitive data, like apiKey, so please be careful with sharing this information (you can send it partially, like this "FG9dU...PcSAt").

Q: What is BladeEnv / SdkEnvironment?

A: In default scenario, you shouldn't specify BladeEnv, in than case Prod will be used

Q: What is dAppCode?

A: dAppCode is a unique identifier for your application. It is used to identify your application in Blade's system. This code is provided by BladeLabs team.

Q: Is it secure to provide private key to SDK methods

A: BladeSDK never share Private keys in any form. It is used only for signing transactions and never leaves the device. It's your responsibility to keep it safe. Please check best practices for storing private keys in your application. Also, treat apiKey as a sensitive data and never share it with anyone.

Q: Where I can find examples?

A: You can find examples for almost any of provided SDK. List of SDKs with examples provide above.

Q: Still have questions?

A: Feel free to contact us. We are always happy to help you.

Disclaimer

Please note that the security of your private keys is your sole responsibility.

Our SDKs, which wraps Hedera SDK and Blade wallet API, have been developed to ensure the highest level of security possible.

However, we do not take any responsibility for the security of your private keys.

Please be aware that once someone else gains access to your private keys, they will have full control of your account, funds, tokens, and NFTs.

We strongly recommend that you follow best practices for securing your private keys when using our SDKs. Please be aware that private keys will never be sent over the network or shared with any third party through our SDK.

Best practices for securing your private keys

Here are some examples of secure storage options for hex-encoded private keys for iOS, Android, and JavaScript:

iOS:

Keychain: iOS provides a secure Keychain service that allows you to store sensitive information, such as private keys, securely. You can use the Keychain API provided by Apple to store and retrieve private keys in a secure manner.

Encrypted file: You can store the private key in an encrypted file and save it to the device's file system. The file can be decrypted when needed using a password or passphrase.

Android:

Android Keystore: Android provides a secure hardware-backed Keystore service that allows you to store cryptographic keys securely. You can use the Android Keystore API provided by Google to store and retrieve private keys in a secure manner.

Encrypted file: Similar to iOS, you can store the private key in an encrypted file and save it to the device's file system. The file can be decrypted when needed using a password or passphrase.

JavaScript:

Browser local storage: You can store an encrypted private key in the browser's local storage, which provides a simple way to store data on the user's device. However, this is not the most secure option as the data can be accessed by other scripts running on the same page.

Encrypted cookie: You can store the private key in an encrypted cookie on the user's device. The cookie can be decrypted when needed using a password or passphrase. However, this is not the most secure option as cookies can be accessed by other scripts running on the same page.

It's important to note that these are just a few examples, and there may be other secure storage options available depending on your specific use case and requirements. It's recommended to consult with a security expert to determine the most appropriate storage solution for your needs.

Supported features across SDKs

  • ✅ - implemented

  • ❌ - not implemented

Features

init

Inits instance of BladeSDK for correct work with Blade API and Hedera network.

Example

const info = await bladeSdk.init("apiKey", "Mainnet", "dAppCode");

getInfo

This method returns basic params of initialized instance of BladeSDK. This params may useful for support.

Returned object likely will contain next fields: apiKey, dAppCode, network, visitorId, sdkEnvironment, sdkVersion, nonce

In case of support please not provide full apiKey, limit yourself to the part of the code that includes a few characters at the beginning and at the end (eg. AdR3....BFgd)

Example

const info = bladeSdk.getInfo();

setUser

Set account for further operations.

Currently supported two account providers: Hedera and Magic.

Hedera: pass accountId and privateKey as hex-encoded strings with DER-prefix (302e020100300506032b657004220420...)

Magic: pass email to accountIdOrEmail and empty string as privateKey. SDK will handle Magic authentication, and finish after user click on confirmation link in email.

After successful authentication, SDK will store public and private keys in memory and use them for further operations.

After that in each method call provide empty strings to accountId and accountPrivateKey. Otherwise, SDK will override current user with provided credentials as Hedera provider.

In case of calling method with accountId and accountPrivateKey arguments, SDK will override current user with this credentials.

It's optional method, you can pass accountId and accountPrivateKey in each method call. In further releases this method will be mandatory.

Example

// Set account for Hedera provider
const userInfo = await bladeSdk.setUser(AccountProvider.Hedera, "0.0.45467464", "302e020100300506032b6570042204204323472EA5374E80B07346243234DEADBEEF25235235...");
// Set account for Magic provider
const userInfo = await bladeSdk.setUser(AccountProvider.Magic, "your_email@domain.com", "");

resetUser

Clears current user credentials.

Example

const result = await bladeSdk.resetUser();

getBalance

Get hbar and token balances for specific account.

Example

const balance = await bladeSdk.getBalance("0.0.45467464");

getCoinList

Get list of all available coins on CoinGecko.

Example

const coinList = await bladeSdk.getCoinList();

getCoinPrice

Get coin price and coin info from CoinGecko. Search can be coin id or address in one of the coin platforms.

Example

const coinInfo = await bladeSdk.getCoinPrice("hedera-hashgraph", "usd");

transferHbars

Send hbars to specific account.

Example

const receipt = await bladeSdk.transferHbars("0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", "0.0.10002", "1.0", "test memo");

contractCallFunction

Call contract function. Directly or via BladeAPI using paymaster account (fee will be paid by Paymaster account), depending on your dApp configuration.

Example

const params = new ParametersBuilder().addString("Hello");
const contractId = "0.0.123456";
const gas = 100000;
const receipt = await bladeSdk.contractCallFunction(contractId, "set_message", params, "0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", gas, false);

contractCallQueryFunction

Call query on contract function. Similar to {@link contractCallFunction} can be called directly or via BladeAPI using Paymaster account.

Example

const params = new ParametersBuilder();
const contractId = "0.0.123456";
const gas = 100000;
const result = await bladeSdk.contractCallQueryFunction(contractId, "get_message", params, "0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", gas, false, ["string"]);

transferTokens

Send token to specific account.

Example

const receipt = await bladeSdk.transferTokens("0.0.1337", "0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", "0.0.10002", "1.0", "test memo", false);

createScheduleTransaction

Create scheduled transaction

Example

const receiverAccountId = "0.0.10001";
const receiverAccountPrivateKey = "302e020100300506032b65700422042043234DEADBEEF255...";
const senderAccountId = "0.0.10002";
const tokenId = "0.0.1337";
const nftId = "0.0.1234";
const {scheduleId} = await bladeSdk.createScheduleTransaction(
    receiverAccountId,
    receiverAccountPrivateKey,
    "TRANSFER", [
        {
            type: "HBAR",
            sender: senderAccountId,
            receiver: receiverAccountId,
            value: 1 * 10**8,
        },
        {
            type: "FT",
            sender: senderAccountId,
            receiver: receiverAccountId,
            tokenId: tokenId,
            value: 1
        },
        {
            type: "NFT",
            sender: senderAccountId,
            receiver: receiverAccountId,
            tokenId: nftId,
            serial: 4
        },
    ],
    false
);

signScheduleId

Sign scheduled transaction

Example

const scheduleId = "0.0.754583634";
const senderAccountId = "0.0.10002";
const senderAccountPrivateKey = "302e020100300506032b65700422042043234DEADBEEF255...";
const receiverAccountId = "0.0.10001";
const receipt = await bladeSdk.signScheduleId(scheduleId, senderAccountId, senderAccountPrivateKey, receiverAccountId, false);

createAccount

Create new Hedera account (ECDSA). Only for configured dApps. Depending on dApp config Blade create account, associate tokens, etc.

In case of not using pre-created accounts pool and network high load, this method can return transactionId and no accountId.

In that case account creation added to queue, and you should wait some time and call getPendingAccount() method.

Example

const account = await bladeSdk.createAccount();

getPendingAccount

Get account from queue (read more at createAccount()).

If account already created, return account data.

If account not created yet, response will be same as in createAccount() method if account in queue.

Example

const account = await bladeSdk.createAccount();
if (account.status === "PENDING") {
  // wait some time and call getPendingAccount method
  account = await bladeSdk.getPendingAccount(account.transactionId, account.seedPhrase);
}

deleteAccount

Delete Hedera account. This method requires account private key and operator private key. Operator is the one who paying fees

Example

const receipt = await bladeSdk.deleteAccount(accountToDelete.accountId, accountToDelete.privateKey, "0.0.10001", "0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...");

getAccountInfo

Get account info.

EvmAddress is address of Hedera account if exists. Else accountId will be converted to solidity address.

CalculatedEvmAddress is calculated from account public key. May be different from evmAddress.

Example

const accountInfo = await bladeSdk.getAccountInfo("0.0.10001");

getNodeList

Get Node list

Example

const nodeList = await bladeSdk.getNodeList();

stakeToNode

Stake/unstake account

Example

const receipt = await bladeSdk.stakeToNode("0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", 3);

getKeysFromMnemonic

Example

const result = await bladeSdk.getKeysFromMnemonic("purity slab doctor swamp tackle rebuild summer bean craft toddler blouse switch");

searchAccounts

Get accounts list and keys from private key or mnemonic

Supporting standard and legacy key derivation.

Every key with account will be returned.

Example

const resultKey = await bladeSdk.searchAccounts("302e020100300506032b65700422042043234DEADBEEF255...");
const resultSeed = await bladeSdk.searchAccounts("purity slab doctor swamp tackle rebuild summer bean craft toddler blouse switch");

dropTokens

Bladelink drop to account

Example

const drop = await bladeSdk.dropTokens("0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", "secret-nonce");

sign

Sign base64-encoded message with private key. Returns hex-encoded signature.

Example

const signed = await bladeSdk.sign(btoa("Hello"), "302e020100300506032b65700422042043234DEADBEEF255...");

signVerify

Verify message signature by public key

Example

const signature = "27cb9d51434cf1e76d7ac515b19442c619f641e6fccddbf4a3756b14466becb6992dc1d2a82268018147141fc8d66ff9ade43b7f78c176d070a66372d655f942";
const publicKey = "302d300706052b8104000a032200029dc73991b0d9cdbb59b2cd0a97a0eaff6de...";
const valid = await bladeSdk.signVerify(btoa("Hello"), signature, publicKey);

ethersSign

Sign base64-encoded message with private key using ethers lib. Returns hex-encoded signature.

Example

const signed = await bladeSdk.ethersSign(btoa("Hello"), "302e020100300506032b65700422042043234DEADBEEF255...");

splitSignature

Split signature to v-r-s format.

Example

const signature = "27cb9d51434cf1e76d7ac515b19442c619f641e6fccddbf4a3756b14466becb6992dc1d2a82268018147141fc8d66ff9ade43b7f78c176d070a66372d655f942";
const {v, r, s} = await bladeSdk.splitSignature(signature);

getParamsSignature

Get v-r-s signature of contract function params

Example

const params = new ParametersBuilder().addAddress(accountId).addString("Hello");
const result = await bladeSdk.getParamsSignature(params, "302e020100300506032b65700422042043234DEADBEEF255...");

getTransactions

Get transactions history for account. Can be filtered by transaction type.

Transaction requested from mirror node. Every transaction requested for child transactions. Result are flattened.

If transaction type is not provided, all transactions will be returned.

If transaction type is CRYPTOTRANSFERTOKEN records will additionally contain plainData field with decoded data.

Example

const transactions = await bladeSdk.getTransactions("0.0.10001");

getC14url

Get configured url for C14 integration (iframe or popup)

Example

const {url} = await bladeSdk.getC14url("HBAR", "0.0.10001", "100");

exchangeGetQuotes

Get quotes from different services for buy, sell or swap

Example

const quotes = await bladeSdk.exchangeGetQuotes("EUR", 100, "HBAR", CryptoFlowServiceStrategy.BUY);

swapTokens

Swap tokens

Example

const result = await bladeSdk.swapTokens("0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...", "HBAR", 1, "SAUCE", 0.5, "saucerswapV2");

getTradeUrl

Get configured url to buy or sell tokens or fiat

Example

const {url} = await bladeSdk.getTradeUrl(CryptoFlowServiceStrategy.BUY, "0.0.10001", "EUR", 50, "HBAR", 0.5, "saucerswapV2", redirectUrl);

createToken

Create token (NFT or Fungible Token)

Example

const keys: KeyRecord[] = [
    {type: KeyType.admin, privateKey: adminKey},
    {type: KeyType.wipe, privateKey: wipeKey},
    {type: KeyType.pause, privateKey: pauseKey},
];
const treasuryAccountId = "0.0.10001";
const supplyKey = "302e020100300506032b65700422042043234DEADBEEF255...";
const result = await bladeSdk.createToken(
    treasuryAccountId, // treasuryAccountId
    supplyKey, // supplyPrivateKey
    tokenName,
    tokenSymbol,
    true, // isNft
    keys,
    0, // decimals
    0, // initialSupply
    250, // maxSupply
);

associateToken

Associate token to account. Association fee will be covered by PayMaster, if tokenId configured in dApp

Example

const result = await bladeSdk.associateToken("0.0.1337", "0.0.10001", "302e020100300506032b65700422042043234DEADBEEF255...");

nftMint

Mint one NFT

Example

const receipt = await bladeSdk.nftMint(
    tokenId,
    treasuryAccountId,
    supplyKey,
    "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAARUlEQVR42u3PMREAAAgEIO1fzU5vBlcPGtCVTD3QIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIXCyqyi6fIALs1AAAAAElFTkSuQmCC", // TODO upload file base64
    {
        author: "GaryDu",
        other: "metadata",
        some: "more properties"
    },
    {
        provider: NFTStorageProvider.nftStorage,
        apiKey: nftStorageApiKey,
    }
);

getTokenInfo

Get token info. Fungible or NFT. Also get NFT metadata if serial provided

Example

const tokenInfo = await bladeSdk.getTokenInfo("0.0.1234", "3");

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