Usage

Contents

• initialize

• getInfo

• getBalance

• getCoinList

• getCoinPrice

• transferHbars

• transferTokens

• createScheduleTransaction

• signScheduleId

• createHederaAccount

• getPendingAccount

• deleteHederaAccount

• getAccountInfo

• getNodeList

• stakeToNode

• getKeysFromMnemonic

• searchAccounts

• dropTokens

• sign

• signVerify

• contractCallFunction

• contractCallQueryFunction

• ethersSign

• splitSignature

• getParamsSignature

• getTransactions

• getC14url

• exchangeGetQuotes

• getTradeUrl

• swapTokens

• createToken

• associateToken

• nftMint

• cleanup

• postMessage

Methods

initialize

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

initialize (apiKey: String, dAppCode: String, network: String, bladeEnv: BladeEnv = BladeEnv.Prod, context: Context, force: Boolean = false, completion: (InfoData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
apiKey	String	Unique key for API provided by Blade team.
dAppCode	String	your dAppCode - request specific one by contacting Bladelabs team
network	String	"Mainnet" or "Testnet" of Hedera network
bladeEnv	BladeEnv	field to set BladeAPI environment (Prod, CI). Prod used by default.
context	Context	android context
force	Boolean	optional field to force init. Will not crash if already initialized
completion	(InfoData?,BladeJSError?)->Unit	callback function, with result of InfoData or BladeJSError

Returns

InfoData - with information about Blade instance, including visitorId

Example

Blade.initialize(
    Config.apiKey, Config.dAppCode, Config.network, Config.bladeEnv, requireContext(), false
) { infoData, error ->
    println(infoData ?: error)
}

getInfo

Get SDK info and check if SDK initialized

getInfo (completion: (InfoData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
completion	(InfoData?,BladeJSError?)->Unit	callback function, with result of InfoData or BladeJSError

Returns

InfoData - with information about Blade instance, including visitorId

Example

Blade.getInfo { infoData, error ->
    println(infoData ?: error)
}

getBalance

Get balances by account id.

getBalance (id: String, completion: (BalanceData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
id	String	Hedera account id
completion	(BalanceData?,BladeJSError?)->Unit	callback function, with result of BalanceData or BladeJSError

Returns

BalanceData - with information about Hedera account balances (hbar and list of token balances)

Example

Blade.getBalance("0.0.45467464") { result, error ->
    println("${ result ?: error}")
}

getCoinList

Get list of all available coins on CoinGecko.

getCoinList (completion: (CoinListData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
completion	(CoinListData?,BladeJSError?)->Unit	callback function, with result of CoinListData or BladeJSError

Returns

CoinListData - with list of coins described by name, alias, platforms

Example

Blade.getCoinList { result, error ->
    if (result != null) {
        for (coin in result.coins) {
            println(coin)
        }
    } else {
        println(error)
    }
}

getCoinPrice

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

• In addition to the price in USD, the price in the currency you specified is returned

getCoinPrice (search: String, currency: String = "usd", completion: (CoinInfoData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
search	String	CoinGecko coinId, or address in one of the coin platforms or hbar (default, alias for hedera-hashgraph)
currency	String	result currency for price field
completion	(CoinInfoData?,BladeJSError?)->Unit	callback function, with result of CoinListData or BladeJSError

Returns

{CoinInfoData}

Example

Blade.getCoinPrice(
    search = "hbar",
    currency = "uah"
) { result, bladeJSError ->
    println("${result ?: bladeJSError}")
}

transferHbars

Method to execute Hbar transfers from current account to receiver

transferHbars (accountId: String, accountPrivateKey: String, receiverId: String, amount: Double, memo: String, completion: (TransactionReceiptData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	sender account id
accountPrivateKey	String	sender's private key to sign transfer transaction
receiverId	String	receiver
amount	Double	amount
memo	String	memo (limited to 100 characters)
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val senderId = "0.0.10001"
val senderKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val receiverId = "0.0.10002"
val amount = 2.5
Blade.transferHbars(
    senderId,
    senderKey,
    receiverId,
    amount,
    "Some memo text"
) { result, error ->
    println(result ?: error)
}

transferTokens

Method to execute token transfers from current account to receiver

transferTokens (tokenId: String, accountId: String, accountPrivateKey: String, receiverId: String, amountOrSerial: Double, memo: String, usePaymaster: Boolean = true, completion: (TransactionReceiptData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
tokenId	String	token id to send (0.0.xxxxx)
accountId	String	sender account id (0.0.xxxxx)
accountPrivateKey	String	sender's hex-encoded private key with DER-header (302e020100300506032b657004220420...). ECDSA or Ed25519
receiverId	String	receiver account id (0.0.xxxxx)
amountOrSerial	Double	amount of fungible tokens to send (with token-decimals correction) on NFT serial number
memo	String	transaction memo (limited to 100 characters)
usePaymaster	Boolean	if true, Paymaster account will pay fee transaction. Only for single dApp configured fungible-token. In that case tokenId not used
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val tokenId = "0.0.1337"
val senderId = "0.0.10001"
val senderKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val receiverId = "0.0.10002"
val amount = 2.5
Blade.transferTokens(
    tokenId,
    senderId,
    senderKey,
    receiverId,
    amount,
    "Token transfer memo"
) { result, error ->
    println(result ?: error)
}

createScheduleTransaction

Create scheduled transaction

createScheduleTransaction ( accountId: String, accountPrivateKey: String, type: ScheduleTransactionType, transfers: List<ScheduleTransactionTransfer>, usePaymaster: Boolean = false, completion: (CreateScheduleData?, BladeJSError?) -> Unit )

Parameters

Name	Type	Description
accountId	String	account id (0.0.xxxxx)
accountPrivateKey	String	account key (hex encoded privateKey with DER-prefix)
type	ScheduleTransactionType	schedule transaction type (currently only TRANSFER supported)
transfers	List<ScheduleTransactionTransfer>	array of transfers to schedule (HBAR, FT, NFT)
usePaymaster	Boolean	if true, Paymaster account will pay transaction fee (also dApp had to be configured for free schedules)
completion	(CreateScheduleData?,BladeJSError?)->Unit	callback function, with result of CreateScheduleData or BladeJSError

Returns

CreateScheduleData - scheduleId

Example

val receiverId = "0.0.10002"
val receiverKey = "302d300706052b8104000a032200029dc73991b00002..."
val senderId = "0.0.10001"
val tokenId = "0.0.1337"
var scheduleId = ""
Blade.createScheduleTransaction(
    accountId = receiverId,
    accountPrivateKey = receiverKey,
    type = ScheduleTransactionType.TRANSFER,
    transfers = listOf(
        ScheduleTransactionTransferHbar(sender = senderId, receiver = receiverId, 10000000),
        ScheduleTransactionTransferToken(sender = senderId, receiver = receiverId, tokenId = tokenId, value = 3)
    ),
    usePaymaster = true,
) { result, error ->
    if (result != null) {
        println(result.scheduleId)
    }
}

signScheduleId

Method to sign scheduled transaction

signScheduleId ( scheduleId: String, accountId: String, accountPrivateKey: String, receiverAccountId: String = "", usePaymaster: Boolean = false, completion: (TransactionReceiptData?, BladeJSError?) -> Unit )

Parameters

Name	Type	Description
scheduleId	String	scheduled transaction id (0.0.xxxxx)
accountId	String	account id (0.0.xxxxx)
accountPrivateKey	String	account key (hex encoded privateKey with DER-prefix)
receiverAccountId	String	account id of receiver for additional validation in case of dApp freeSchedule transactions configured
usePaymaster	Boolean	if true, Paymaster account will pay transaction fee (also dApp had to be configured for free schedules)
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val senderId = "0.0.10001"
val senderKey = "302d300706052b8104000a032200029dc73991b00001..."
val receiverId = "0.0.10002"
var scheduleId = "0.0...." // result of createScheduleTransaction on receiver side
Blade.signScheduleId(
    scheduleId = scheduleId,
    accountId = senderId,
    accountPrivateKey = senderKey,
    receiverAccountId = receiverId,
    usePaymaster = true
) { result, bladeJSError ->
    println(result ?: bladeJSError)
}

createHederaAccount

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.

createHederaAccount (privateKey: String = "", deviceId: String = "", completion: (CreatedAccountData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
privateKey	String	optional field if you need specify account key (hex encoded privateKey with DER-prefix)
deviceId	String	optional field unique device id (advanced security feature, required only for some dApps)
completion	(CreatedAccountData?,BladeJSError?)->Unit	callback function, with result of CreatedAccountData or BladeJSError

Returns

CreatedAccountData - new account data, including private key and account id

Example

Blade.createHederaAccount() { result, error ->
    println(result ?: error)
}

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.

getPendingAccount (transactionId: String, seedPhrase: String, completion: (CreatedAccountData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
transactionId	String	can be received on createHederaAccount method, when busy network is busy, and account creation added to queue
seedPhrase	String	returned from createHederaAccount method, required for updating keys and proper response
completion	(CreatedAccountData?,BladeJSError?)->Unit	callback function, with result of CreatedAccountData or BladeJSError

Returns

CreatedAccountData - new account data

deleteHederaAccount

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

deleteHederaAccount (deleteAccountId: String, deletePrivateKey: String, transferAccountId: String, operatorAccountId: String, operatorPrivateKey: String, completion: (TransactionReceiptData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
deleteAccountId	String	account id of account to delete (0.0.xxxxx)
deletePrivateKey	String	account private key (DER encoded hex string)
transferAccountId	String	The ID of the account to transfer the remaining funds to.
operatorAccountId	String	operator account id (0.0.xxxxx). Used for fee
operatorPrivateKey	String	operator's account private key (DER encoded hex string)
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val deleteAccountId = "0.0.65468464"
val deletePrivateKey = "3030020100300706052b8104000a04220420ebc..."
val transferAccountId = "0.0.10001"
val operatorAccountId = "0.0.10002"
val operatorPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
Blade.deleteHederaAccount(
    deleteAccountId,
    deletePrivateKey,
    transferAccountId,
    operatorAccountId,
    operatorPrivateKey,
) { result, error ->
    println(result ?: error)
}

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.

getAccountInfo (accountId: String, completion: (AccountInfoData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	Hedera account id (0.0.xxxxx)
completion	(AccountInfoData?,BladeJSError?)->Unit	callback function, with result of AccountInfoData or BladeJSError

Returns

{AccountInfoData}

Example

Blade.getAccountInfo("0.0.10002") { accountInfoData, error ->
    println(accountInfoData ?: error)
}

getNodeList

Get Node list and use it for choosing account stacking node

getNodeList (completion: (NodesData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
completion	(NodesData?,BladeJSError?)->Unit	callback function, with result of NodesData or BladeJSError

Returns

NodesData - node list

Example

Blade.getNodeList { nodeListData, error ->
    println(nodeListData ?: error)
}

stakeToNode

Stake/unstake account

stakeToNode (accountId: String, accountPrivateKey: String, nodeId: Int, completion: (TransactionReceiptData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	Hedera account id (0.0.xxxxx)
accountPrivateKey	String	account private key (DER encoded hex string)
nodeId	Int	node id to stake to. If negative or null, account will be unstaked
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

Blade.stakeToNode("0.0.10002", "302d300706052b8104000a032200029dc73991b0d9cd...", 5) { result, error ->
    println(result ?: error)
}

getKeysFromMnemonic

Get private key and accountId from mnemonic. Supported standard and legacy key derivation.

• If account not found, standard ECDSA key will be returned.

• Keys returned with DER header. EvmAddress computed from Public key.

getKeysFromMnemonic (mnemonic: String, lookupNames: Boolean = false, completion: (PrivateKeyData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
mnemonic	String	seed phrase (BIP39 mnemonic)
lookupNames	Boolean	lookup for accounts (not used anymore, account search is mandatory)
completion	(PrivateKeyData?,BladeJSError?)->Unit	callback function, with result of PrivateKeyData or BladeJSError

Returns

PrivateKeyData - private key derived from mnemonic and account id

Example

Blade.getKeysFromMnemonic("purity slab doctor swamp tackle rebuild summer bean craft toddler blouse switch") { result, error ->
    println(result ?: error)
}

searchAccounts

Get accounts list and keys from private key or mnemonic

• Supporting standard and legacy key derivation.

• Every key with account will be returned.

searchAccounts (keyOrMnemonic: String, completion: (AccountPrivateData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
keyOrMnemonic	String	BIP39 mnemonic, private key with DER header
completion	(AccountPrivateData?,BladeJSError?)->Unit	callback function, with result of AccountPrivateData or BladeJSError

Returns

AccountPrivateData - list of found accounts with private keys

Example

Blade.searchAccounts("purity slab doctor swamp tackle rebuild summer bean craft toddler blouse switch") { result, error ->
    println(result ?: error)
}

dropTokens

Bladelink drop to account

dropTokens (accountId: String, accountPrivateKey: String, secretNonce: String, completion: (TokenDropData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	Hedera account id (0.0.xxxxx)
accountPrivateKey	String	account private key (DER encoded hex string)
secretNonce	String	configured for dApp. Should be kept in secret
completion	(TokenDropData?,BladeJSError?)->Unit	callback function, with result of TokenDropData or BladeJSError

Returns

TokenDropData - status

Example

val accountId = "0.0.10002"
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val secretNonce = "[ CENSORED ]"
Blade.dropTokens(
    accountId,
    accountPrivateKey,
    secretNonce,
) { result, error ->
    println(result ?: error)
}

sign

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

sign (messageString: String, privateKey: String, completion: (SignMessageData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
messageString	String	base64-encoded message to sign
privateKey	String	hex-encoded private key with DER header
completion	(SignMessageData?,BladeJSError?)->Unit	callback function, with result of SignMessageData or BladeJSError

Returns

SignMessageData - signature

Example

import java.util.Base64
// ...
val originalString = "hello"
val encodedString: String = Base64.getEncoder().encodeToString(originalString.toByteArray())
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
Blade.sign(
    encodedString,
    accountPrivateKey
) { result, error ->
    println(result ?: error)
}

signVerify

Verify message signature with public key

signVerify (messageString: String, signature: String, publicKey: String, completion: (SignVerifyMessageData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
messageString	String	base64-encoded message (same as provided to sign() method)
signature	String	hex-encoded signature (result from sign() method)
publicKey	String	hex-encoded public key with DER header
completion	(SignVerifyMessageData?,BladeJSError?)->Unit	callback function, with result of SignVerifyMessageData or BladeJSError

Returns

SignVerifyMessageData - verification result

Example

val originalString = "hello"
val encodedString: String = Base64.getEncoder().encodeToString(originalString.toByteArray())
val signature = "27cb9d51434cf1e76d7ac515b19442c619f641e6fccddbf4a3756b14466becb6992dc1d2a82268018147141fc8d66ff9ade43b7f78c176d070a66372d655f942"
val publicKey = "302d300706052b8104000a032200029dc73991b0d9cdbb59b2cd0a97a0eaff6de801726cb39804ea9461df6be2dd30"
Blade.signVerify(
    encodedString,
    signature,
    publicKey
) { result, error ->
    lifecycleScope.launch {
        println(result ?: error)
    }
}

contractCallFunction

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

contractCallFunction (contractId: String, functionName: String, params: ContractFunctionParameters, accountId: String, accountPrivateKey: String, gas: Int = 100000, usePaymaster: Boolean, completion: (TransactionReceiptData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
contractId	String	contract id (0.0.xxxxx)
functionName	String	name of the contract function to call
params	ContractFunctionParameters	function argument. Can be generated with
accountId	String	operator account id (0.0.xxxxx)
accountPrivateKey	String	operator's hex-encoded private key with DER-header, ECDSA or Ed25519
gas	Int	gas limit for the transaction
usePaymaster	Boolean	if true, fee will be paid by Paymaster account (note: msg.sender inside the contract will be Paymaster account)
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val contractId = "0.0.123456"
val functionName = "set_message"
val parameters = ContractFunctionParameters().addString("hello")
val accountId = "0.0.10002"
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val gas = 155000
val usePaymaster = false
Blade.contractCallFunction(
    contractId,
    functionName,
    parameters,
    accountId,
    accountPrivateKey,
    gas,
    usePaymaster
) { result, error ->
    println(result ?: error)
}

contractCallQueryFunction

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

contractCallQueryFunction (contractId: String, functionName: String, params: ContractFunctionParameters, accountId: String, accountPrivateKey: String, gas: Int = 100000, usePaymaster: Boolean, returnTypes: List<String>, completion: (ContractQueryData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
contractId	String	contract id (0.0.xxxxx)
functionName	String	name of the contract function to call
params	ContractFunctionParameters	function argument. Can be generated with
accountId	String	operator account id (0.0.xxxxx)
accountPrivateKey	String	operator's hex-encoded private key with DER-header, ECDSA or Ed25519
gas	Int	gas limit for the transaction
usePaymaster	Boolean	if true, the fee will be paid by paymaster account (note: msg.sender inside the contract will be Paymaster account)
returnTypes	List<String>	List of return types, e.g. listOf("string", "int32")
completion	(ContractQueryData?,BladeJSError?)->Unit	callback function, with result of ContractQueryData or BladeJSError

Returns

ContractQueryData - contract query call result

Example

val contractId = "0.0.123456"
val functionName = "get_message"
val parameters = ContractFunctionParameters()
val accountId = "0.0.10002"
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val gas = 55000
val usePaymaster = false
val returnTypes = listOf("string", "int32")
Blade.contractCallQueryFunction(
    contractId,
    functionName,
    parameters,
    accountId,
    accountPrivateKey,
    gas,
    usePaymaster,
    returnTypes
) { result, error ->
    lifecycleScope.launch {
        println(result ?: error)
    }
}

ethersSign

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

ethersSign (messageString: String, privateKey: String, completion: (SignMessageData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
messageString	String	base64-encoded message to sign
privateKey	String	hex-encoded private key with DER header
completion	(SignMessageData?,BladeJSError?)->Unit	callback function, with result of SignMessageData or BladeJSError

Returns

SignMessageData - signature

Example

import java.util.Base64
// ...
val originalString = "hello"
val encodedString: String = Base64.getEncoder().encodeToString(originalString.toByteArray())
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
Blade.ethersSign(
    encodedString,
    accountPrivateKey
) { result, error ->
    println(result ?: error)
}

splitSignature

Split signature to v-r-s format.

splitSignature (signature: String, completion: (SplitSignatureData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
signature	String	hex-encoded signature
completion	(SplitSignatureData?,BladeJSError?)->Unit	callback function, with result of SplitSignatureData or BladeJSError

Returns

SplitSignatureData - v-r-s signature

Example

Blade.splitSignature(
    "0x27cb9d51434cf1e76d7ac515b19442c619f641e6fccddbf4a3756b14466becb6992dc1d2a82268018147141fc8d66ff9ade43b7f78c176d070a66372d655f942",
) { result, error ->
    println(result ?: error)
}

getParamsSignature

Get v-r-s signature of contract function params

getParamsSignature (params: ContractFunctionParameters, accountPrivateKey: String, completion: (SplitSignatureData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
params	ContractFunctionParameters	data to sign. (instance of ContractFunctionParameters)
accountPrivateKey	String	signer private key (hex-encoded with DER header)
completion	(SplitSignatureData?,BladeJSError?)->Unit	callback function, with result of SplitSignatureData or BladeJSError

Returns

SplitSignatureData - v-r-s signature

Example

val parameters = ContractFunctionParameters().addString("hello")
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
Blade.getParamsSignature(
    parameters,
    accountPrivateKey
) { result, error ->
    println(result ?: error)
}

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.

getTransactions (accountId: String, transactionType: String, nextPage: String = "", transactionsLimit: Int = 10, completion: (TransactionsHistoryData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	account id to get transactions for (0.0.xxxxx)
transactionType	String	one of enum MirrorNodeTransactionType or "CRYPTOTRANSFERTOKEN"
nextPage	String	link to next page of transactions from previous request
transactionsLimit	Int	number of transactions to return. Speed of request depends on this value if transactionType is set.
completion	(TransactionsHistoryData?,BladeJSError?)->Unit	callback function, with result of TransactionsHistoryData or BladeJSError

Returns

TransactionsHistoryData - transactions list

Example

Blade.getTransactions(
    accountId = "0.0.10002",
    transactionType = "",
    nextPage = "",
    transactionsLimit = 15
) { result, error ->
    println(result ?: error)
}

getC14url

Get configured url for C14 integration (iframe or popup)

getC14url (asset: String, account: String, amount: String = "", completion: (IntegrationUrlData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
asset	String	USDC, HBAR, KARATE or C14 asset uuid
account	String	receiver account id (0.0.xxxxx)
amount	String	preset amount. May be overwritten if out of range (min/max)
completion	(IntegrationUrlData?,BladeJSError?)->Unit	callback function, with result of IntegrationUrlData or BladeJSError

Returns

IntegrationUrlData - url to open

Example

Blade.getC14url(
    asset = "HBAR",
    account = "0.0.10002",
    amount = "120"
) { result, error ->
    println(result ?: error)
}

exchangeGetQuotes

Get quotes from different services for buy, sell or swap

exchangeGetQuotes (sourceCode: String, sourceAmount: Double, targetCode: String, strategy: CryptoFlowServiceStrategy, completion: (SwapQuotesData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
sourceCode	String	name (HBAR, KARATE, other token code)
sourceAmount	Double	amount to swap, buy or sell
targetCode	String	name (HBAR, KARATE, USDC, other token code)
strategy	CryptoFlowServiceStrategy	one of enum CryptoFlowServiceStrategy (Buy, Sell, Swap)
completion	(SwapQuotesData?,BladeJSError?)->Unit	callback function, with result of SwapQuotesData or BladeJSError

Returns

SwapQuotesData - quotes from different provider

Example

Blade.exchangeGetQuotes(
    sourceCode = "EUR",
    sourceAmount = 50.0,
    targetCode = "HBAR",
    strategy = CryptoFlowServiceStrategy.BUY
) { result, error ->
    println(result ?: error)
}

getTradeUrl

Get configured url to buy or sell tokens or fiat

getTradeUrl (strategy: CryptoFlowServiceStrategy, accountId: String, sourceCode: String, sourceAmount: Double, targetCode: String, slippage: Double, serviceId: String, redirectUrl: String = "", completion: (IntegrationUrlData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
strategy	CryptoFlowServiceStrategy	Buy / Sell
accountId	String	account id
sourceCode	String	name (HBAR, KARATE, USDC, other token code)
sourceAmount	Double	amount to buy/sell
targetCode	String	name (HBAR, KARATE, USDC, other token code)
slippage	Double	slippage in percents. Transaction will revert if the price changes unfavorably by more than this percentage.
serviceId	String	service id to use for swap (saucerswap, onmeta, etc)
redirectUrl	String	url to redirect after final step
completion	(IntegrationUrlData?,BladeJSError?)->Unit	callback function, with result of IntegrationUrlData or BladeJSError

Returns

IntegrationUrlData - url to open

Example

Blade.getTradeUrl(
    strategy = CryptoFlowServiceStrategy.BUY,
    accountId = "0.0.10002",
    sourceCode = "EUR",
    sourceAmount = 50.0,
    targetCode = "HBAR",
    slippage = 0.5,
    serviceId = "moonpay"
) { result, error ->
    println(result ?: error)
}

swapTokens

Swap tokens

swapTokens (accountId: String, accountPrivateKey: String, sourceCode: String, sourceAmount: Double, targetCode: String, slippage: Double, serviceId: String, completion: (ResultData?, BladeJSError?) -> Unit)

Parameters

Name	Type	Description
accountId	String	account id
accountPrivateKey	String	account private key
sourceCode	String	name (HBAR, KARATE, other token code)
sourceAmount	Double	amount to swap
targetCode	String	name (HBAR, KARATE, other token code)
slippage	Double	slippage in percents. Transaction will revert if the price changes unfavorably by more than this percentage.
serviceId	String	service id to use for swap (saucerswap, etc)
completion	(ResultData?,BladeJSError?)->Unit	callback function, with result of ResultData or BladeJSError

Returns

ResultData - swap result

Example

val accountId = "0.0.10001"
val accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val sourceCode = "USDC"
val targetCode = "KARATE"
Blade.swapTokens(
    accountId,
    accountPrivateKey,
    sourceCode,
    sourceAmount = 123.4,
    targetCode,
    slippage = 0.5,
    serviceId = "moonpay"
) { result, error ->
    println(result ?: error)
}

createToken

Create token (NFT or Fungible Token)

createToken ( treasuryAccountId: String, supplyPrivateKey: String, tokenName: String, tokenSymbol: String, isNft: Boolean, keys: List<KeyRecord>, decimals: Int, initialSupply: Int, maxSupply: Int, completion: (CreateTokenData?, BladeJSError?) -> Unit )

Parameters

Name	Type	Description
treasuryAccountId	String	treasury account id
supplyPrivateKey	String	supply account private key
tokenName	String	token name (string up to 100 bytes)
tokenSymbol	String	token symbol (string up to 100 bytes)
isNft	Boolean	set token type NFT
keys	List<KeyRecord>	token keys
decimals	Int	token decimals (0 for nft)
initialSupply	Int	token initial supply (0 for nft)
maxSupply	Int	token max supply
completion	(CreateTokenData?,BladeJSError?)->Unit	callback function, with result of CreateTokenData or BladeJSError

Returns

CreateTokenData - token id

Example

val keys = listOf(
    KeyRecord(Config.adminPrivateKey, KeyType.admin)
)
Blade.createToken(
        treasuryAccountId = Config.accountId,
        supplyPrivateKey = Config.privateKey,
        tokenName = "Blade Demo Token",
        tokenSymbol = "GD",
        isNft = true,
        keys,
        decimals = 0,
        initialSupply = 0,
        maxSupply = 250
) { result, error ->
    println(result ?: error)
}

associateToken

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

associateToken ( tokenId: String, accountId: String, accountPrivateKey: String, completion: (TransactionReceiptData?, BladeJSError?) -> Unit )

Parameters

Name	Type	Description
tokenId	String	token id to associate. Empty to associate all tokens configured in dApp
accountId	String	account id to associate token
accountPrivateKey	String	account private key
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of TransactionReceiptData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

Blade.associateToken(
    tokenId = "0.0.1337",
    accountId = "0.0.10001",
    accountPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
) { result, error ->
    println(result ?: error)
}

nftMint

Mint one NFT

nftMint ( tokenId: String, supplyAccountId: String, supplyPrivateKey: String, file: String, metadata: Map<String, Any>, storageConfig: NFTStorageConfig, completion: (TransactionReceiptData?, BladeJSError?) -> Unit )

Parameters

Name	Type	Description
tokenId	String	token id to mint NFT
supplyAccountId	String	token supply account id
supplyPrivateKey	String	token supply private key
file	String	image to mint (base64 DataUrl image, eg.: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAA...)
metadata	Map<String,Any>	NFT metadata
storageConfig	NFTStorageConfig	IPFS provider config
completion	(TransactionReceiptData?,BladeJSError?)->Unit	callback function, with result of CreateTokenData or BladeJSError

Returns

TransactionReceiptData - receipt

Example

val tokenId = "0.0.13377"
val supplyAccountId = "0.0.10001"
val supplyPrivateKey = "302d300706052b8104000a032200029dc73991b0d9cd..."
val base64Image = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAARUlEQVR42u3PMREAAAgEIO1fzU5vBlcPGtCVTD3QIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIXCyqyi6fIALs1AAAAAElFTkSuQmCC"
val metaData = mapOf<String, Any>(
    "name" to "NFTitle",
    "score" to 10,
    "power" to 4,
    "intelligence" to 6,
    "speed" to 10
)
val storageConfig = NFTStorageConfig(
    provider = NFTStorageProvider.nftStorage,
    apiKey = "eyJhbGcsfgrgsrgInR5cCI6IkpXVCJ9.eyJzd5235326ZXRocjoweDfsdfsdfFM0ZkZFOEJhNjdCNjc1NDk1Q2NEREFiYjk0NTE4Njdsfc3MiOiJuZnQtc3RvcmFnZSIsImlhdCI6sdfNDQ2NDUxODQ2MiwibmFt4I6IkJsYWRlUcvxcRLLXRlc3RrdffifQ.t1wCiEuiTvcYOwssdZgiYaug4aF8ZrvMBdkTASojWGU"
)
Blade.nftMint(
    tokenId,
    supplyAccountId,
    supplyPrivateKey,
    file = base64Image,
    metaData,
    storageConfig,
) { result, error ->
    println(result ?: error)
}

cleanup

Method to clean-up webView

cleanup ()

postMessage

Method to handle JS responses. By technical reasons, must be public, but you can skip it :)

postMessage (jsonString: String)

Parameters

Name	Type	Description
jsonString	String