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op_context

You can only use system namespace op_context in an operation or a function called from an operation, but not in a query.

Functions​

op_context.block_height -> integer​

Provides the height of the block currently being built.

Parameters:

  • None

Returns:

  • integer: The height of the block being built.

op_context.last_block_time -> integer​

Returns the timestamp of the last block in milliseconds.

Parameters:

  • None

Returns:

  • integer: The timestamp of the last block, or -1 if there is no last block.

op_context.op_index -> integer​

Indicates the index of the operation being executed within the transaction.

Parameters:

  • None

Returns:

  • integer: The index of the operation being executed.

op_context.exists -> boolean​

Indicates whether the code is being called from an operation.

Parameters:

  • None

Returns:

  • boolean: true if the code is being called from an operation, false otherwise.

op_context.get_signers() -> list<byte_array>​

Returns a list of pubkeys representing the signers of the current transaction.

Parameters:

  • None

Returns:

  • list<byte_array>: A list of pubkeys of the signers.

op_context.is_signer(public_key: byte_array) -> boolean​

Checks if the provided public key is one of the signers of the current transaction.

Parameters:

  • public_key: The public key to check.

Returns:

  • boolean: true if the public key is a signer, false otherwise.

op_context.get_all_operations() -> list<gtx_operation>​

Returns a list of all operations within the current transaction.

Parameters:

  • None

Returns:

  • list<gtx_operation>: A list of all operations in the transaction.

op_context.get_current_operation() -> gtx_operation​

Retrieves the current operation efficiently.

Parameters:

  • None

Returns:

  • gtx_operation: The current operation object.

op_context.emit_event​

Facilitates communication from Rell code to Postchain components.

Parameters:

  • type: Represents the type of event processor to invoke.
  • data: Contains the value to pass to the event processor.

Returns:

  • None

op_context.transaction -> transaction​

Represents the transaction currently being built.

Parameters:

  • None

Returns:

  • transaction: The transaction object.
warning

You must not use op_context.transaction.block because, except block_height, its attributes are null, so reading them gives a run-time error.