Runtime Environment

Contexts

• __block: the block context
• __transaction the transaction context
• __debug the debug context (debug only)

Transaction Context

All variables and functions are const.

enum transaction_type{
  normal_type,   // invoked by a normal transaction
  relay_type,    // invoked by a relay call
  system_type,   // invoked by the system (the reserved on_xxx() functions)
  scheduled_type // invoked by a scheduled transaction
}

Name	Type	Description	N	R	S	S
get_type()	() -> transaction_type	get the type of transaction	X	X	X	X
get_self_address()	() -> address	The address of this (not accessible from shard functions)	X	X	X	X
get_sender()	() -> address	Returns the first signer of the transaction or the contract that called the current contract	X	X	X	X
get_timestamp()	() -> uint64	Timestamp of the transaction	X	X	X	X
get_signers()	() -> array<address>	the number of signers	X
verify_signer()	(uint32) -> bool	check the signature of a signer	X
verify_signer()	(address) -> bool	check the signature of a signer	X
get_originated_shard_index()	() -> uint32	Index of the originate shard		X
get_originated_shard_order()	() -> uint32	Order of the originate shard		X
get_initiator_address()	() -> address	Target address of originate transaction		X

Block Context

All variables and functions are const.

Name	Type	Description
get_height()	() -> uint64	Height of the block
get_shard_index()	() -> uint32	Index of the shard
get_shard_order()	() -> uint32	Order of the shard
get_timestamp()	() -> uint64	Timestamp of the block
get_random_number()	() -> uint64	get random number based on block metadata
get_miner_address()	() -> address	get address of the block miner

Debug Context

All variables and functions are const.

Name	Type	Description
assert()	(bool) -> void	if false: raise assertion failure exception and terminate execution
assert()	(bool, string) -> void	if false: raise assertion failure exception and terminate execution, display the string in log
print()	(arbitrary) -> void	print informational message