Policy

// index using powers of 2 for efficient bitmasking
enum PolicyType : uint32 {
    Tip = 1,
    WitnessLimit = 2,
    Maturity = 4,
    MaxFee = 8,
    Expiration = 16,
    Owner = 32,
}

name	type	description
data	One of Tip, WitnessLimit, Maturity, Expiration or Owner	Policy data.

Tip

name	type	description
tip	uint64	Additional, optional fee in BASE_ASSET to incentivize block producer to include transaction

WitnessLimit

name	type	description
witnessLimit	uint64	The maximum amount of witness data allowed for the transaction

Given helper len() that returns the number of bytes of a field.

Transaction is invalid if:

• len(tx.witnesses) > witnessLimit

Maturity

name	type	description
maturity	uint32	Block until which the transaction cannot be included.

Transaction is invalid if:

• blockheight() < maturity

Expiration

name	type	description
expiration	uint32	Block after which the transaction cannot be included.

Transaction is invalid if:

• blockheight() > expiration

MaxFee

name	type	description
max_fee	uint64	Required policy to specify the maximum fee payable by this transaction using BASE_ASSET. This is used to check transactions before the actual gas_price is known.

Transaction is invalid if:

• max_fee > sum_inputs(tx, BASE_ASSET_ID) - sum_outputs(tx, BASE_ASSET_ID)
• max_fee < max_fee(tx, BASE_ASSET_ID, gas_price)

Owner

name	type	description
owner	uint64	Index of the transaction input that we nominate as owner

Transaction is invalid if:

• owner >= inputs.len()
• inputs[owner] != InputType::Message && inputs[owner] != InputType::Coin (must point to an input type that supports ownership)