Limits

Global limits for running and managing FCTs

Typed Struct (EIP712)

Limits(uint40 valid_from,uint40 expires_at,uint32 tx_data_limit,uint32 payable_gas_limit,uint40 max_payable_gas_price,bool purgeable,bool blockable)

Params

Name	Type
valid_from	uint40
expires_at	uint40
tx_data_limit	uint32
payable_gas_limit	uint32
max_payable_gas_price	uint40
purgeable	bool
blockable	bool

valid_from

Defines the date and time from which signed FCT can be executed on-chain.

Number of seconds since January 1, 1970

expires_at

Defines the date and time from which signed FCT cannot be executed anymore.

Number of seconds since January 1, 1970

tx_data_limit

The max tx.data length that can used for this FCT

Set value to 0 to disable limit check

This value protects the user from paying high fees, by blocking the activator from pushing unused data at the end of the transaction.

payable_gas_limit

Defines the maximum amount of gas the user is willing to pay for.

Set value to 0 to disable limit check.

It can be used together with the max_payable_gas_price to give users a discount.

max_payable_gas_price

The max gas price that the use is willing to pay.

The tokenomics encourage activators to decrease the gas price by as much as possible, so only in rare cases the actual gas price will reach this limit.

purgeable

When purgeable is true, on-chain information of an expired FCT can be removed from the blockchain by the activators as part of running newer FCTs. This will clean-up the blockchain from unused stored data and will reduce the overall gas usage of the transaction.

If the FCT is part of cross FCTs logic, "false" should be used to ensure that the data is always available on-chain.

blockable

FCT Engine sends the FCT's message hash to the FCT_Runner upon execution requests of calls. It allows the runner to block specific signed FCTs from executing on the blockchain.

The vault implements functions to block and unblock "blockable" FCTs

The FCT runner might override this functionality, e.g. implementing "blocking all FCTs" function that blocks all FCT regardless of the "blockable" field