TransactionQueue

Class to manage procedural transaction queues

Type parameters

ReturnType

TransactionArgs: unknown[][]

Hierarchy

  • TransactionQueue

Index

Constructors

Properties

Methods

Constructors

constructor

+ new TransactionQueue(transactions: TransactionSpecArray‹TransactionArgs›, returnValue: MaybePostTransactionValue‹ReturnType›, context: Context): TransactionQueue

Defined in src/base/TransactionQueue.ts:83

Create a transaction queue

Parameters:

Returns: TransactionQueue

Properties

Optional error

error? : PolymeshError

Defined in src/base/TransactionQueue.ts:57

optional error information

status

status: TransactionQueueStatus = TransactionQueueStatus.Idle

Defined in src/base/TransactionQueue.ts:52

status of the queue

transactions

transactions: PolymeshTransactionArray‹TransactionArgs›

Defined in src/base/TransactionQueue.ts:47

transactions that will be run in the queue

Methods

getMinFees

getMinFees(): Promise‹Fees

Defined in src/base/TransactionQueue.ts:186

Retrieves a lower bound of the fees required to execute this transaction queue. Transaction fees can be higher at execution time for two reasons:

  • One or more transactions (or arguments) depend on the result of another transaction in the queue.

    This means fees can't be calculated for said transaction until previous transactions in the queue have run

  • Protocol fees may vary between when this value is fetched and when the transaction is actually executed because of a

    governance vote

note transaction fees that are paid by a third party aren't included in this total

Returns: Promise‹Fees

onProcessedByMiddleware

onProcessedByMiddleware(listener: function): function

Defined in src/base/TransactionQueue.ts:249

Subscribe to the results of this queue being processed by the harvester (and as such, available to the middleware)

note this event will be fired even if the queue fails

throws if the middleware wasn't enabled when instantiating the SDK client

Parameters:

listener: function

callback function that will be called whenever the middleware is updated with the latest data. If there is an error (timeout or middleware offline) it will be passed to this callback

▸ (err?: PolymeshError): void

Parameters:

Returns: function

unsubscribe function

▸ (): void

onStatusChange

onStatusChange(listener: function): function

Defined in src/base/TransactionQueue.ts:212

Subscribe to status changes on the Transaction Queue

Parameters:

listener: function

callback function that will be called whenever the Transaction Queue's status changes

▸ (transactionQueue: this, err?: PolymeshError): void

Parameters:

Returns: function

unsubscribe function

▸ (): void

onTransactionStatusChange

onTransactionStatusChangeTxArgs, Values›(listener: function): function

Defined in src/base/TransactionQueue.ts:229

Subscribe to status changes on individual transactions

Type parameters:

TxArgs: unknown[]

Values: unknown[]

Parameters:

listener: function

callback function that will be called whenever the individual transaction's status changes

▸ (transaction: PolymeshTransaction‹TxArgs, Values›, transactionQueue: this): void

Parameters:

Returns: function

unsubscribe function

▸ (): void

run

run(): Promise‹ReturnType›

Defined in src/base/TransactionQueue.ts:120

Run the transactions in the queue in sequential order. If a transaction fails or the user refuses to sign it, one of two things can happen:

1) If transaction.isCritical === true, the entire queue fails and the corresponding error is stored in this.error as well as thrown 2) Otherwise, the queue continues executing and the error is stored in transaction.error

Returns: Promise‹ReturnType›

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