Randomness¶
Calls¶
set_babe_randomness_results¶
See [Pallet::set_babe_randomness_results].
Attributes¶
No attributes
Python¶
call = substrate.compose_call(
'Randomness', 'set_babe_randomness_results', {}
)
Events¶
RandomnessRequestedBabeEpoch¶
Attributes¶
| Name | Type | Composition |
|---|---|---|
| id | RequestId |
u64 |
| refund_address | H160 |
[u8; 20] |
| contract_address | H160 |
[u8; 20] |
| fee | BalanceOf<T> |
u128 |
| gas_limit | u64 |
u64 |
| num_words | u8 |
u8 |
| salt | H256 |
scale_info::12 |
| earliest_epoch | u64 |
u64 |
RandomnessRequestedLocal¶
Attributes¶
| Name | Type | Composition |
|---|---|---|
| id | RequestId |
u64 |
| refund_address | H160 |
[u8; 20] |
| contract_address | H160 |
[u8; 20] |
| fee | BalanceOf<T> |
u128 |
| gas_limit | u64 |
u64 |
| num_words | u8 |
u8 |
| salt | H256 |
scale_info::12 |
| earliest_block | BlockNumberFor<T> |
u32 |
RequestExpirationExecuted¶
Attributes¶
| Name | Type | Composition |
|---|---|---|
| id | RequestId |
u64 |
RequestFeeIncreased¶
Attributes¶
| Name | Type | Composition |
|---|---|---|
| id | RequestId |
u64 |
| new_fee | BalanceOf<T> |
u128 |
RequestFulfilled¶
Attributes¶
| Name | Type | Composition |
|---|---|---|
| id | RequestId |
u64 |
Storage functions¶
InherentIncluded¶
Ensures the mandatory inherent was included in the block
Python¶
result = substrate.query(
'Randomness', 'InherentIncluded', []
)
Return value¶
()
LocalVrfOutput¶
Current local per-block VRF randomness
Set in on_initialize
Python¶
result = substrate.query(
'Randomness', 'LocalVrfOutput', []
)
Return value¶
(None, 'scale_info::12')
NotFirstBlock¶
Records whether this is the first block (genesis or runtime upgrade)
Python¶
result = substrate.query(
'Randomness', 'NotFirstBlock', []
)
Return value¶
()
PreviousLocalVrfOutput¶
Previous local per-block VRF randomness
Set in on_finalize of last block
Python¶
result = substrate.query(
'Randomness', 'PreviousLocalVrfOutput', []
)
Return value¶
'scale_info::12'
RandomnessResults¶
Snapshot of randomness to fulfill all requests that are for the same raw randomness Removed once $value.request_count == 0
Python¶
result = substrate.query(
'Randomness', 'RandomnessResults', [{'BabeEpoch': 'u64', 'Local': 'u32'}]
)
Return value¶
{'randomness': (None, 'scale_info::12'), 'request_count': 'u64'}
RelayEpoch¶
Relay epoch
Python¶
result = substrate.query(
'Randomness', 'RelayEpoch', []
)
Return value¶
'u64'
RequestCount¶
Number of randomness requests made so far, used to generate the next request's uid
Python¶
result = substrate.query(
'Randomness', 'RequestCount', []
)
Return value¶
'u64'
Requests¶
Randomness requests not yet fulfilled or purged
Python¶
result = substrate.query(
'Randomness', 'Requests', ['u64']
)
Return value¶
{
'deposit': 'u128',
'request': {
'contract_address': '[u8; 20]',
'fee': 'u128',
'gas_limit': 'u64',
'info': {'BabeEpoch': ('u64', 'u64'), 'Local': ('u32', 'u32')},
'num_words': 'u8',
'refund_address': '[u8; 20]',
'salt': 'scale_info::12',
},
}
Constants¶
BlockExpirationDelay¶
Local requests expire and can be purged from storage after this many blocks/epochs
Value¶
10000
Python¶
constant = substrate.get_constant('Randomness', 'BlockExpirationDelay')
Deposit¶
The amount that should be taken as a security deposit when requesting randomness.
Value¶
1000000000000000000
Python¶
constant = substrate.get_constant('Randomness', 'Deposit')
EpochExpirationDelay¶
Babe requests expire and can be purged from storage after this many blocks/epochs
Value¶
10000
Python¶
constant = substrate.get_constant('Randomness', 'EpochExpirationDelay')
MaxBlockDelay¶
Local per-block VRF requests must be at most this many blocks after the block in which they were requested
Value¶
2000
Python¶
constant = substrate.get_constant('Randomness', 'MaxBlockDelay')
MaxRandomWords¶
Maximum number of random words that can be requested per request
Value¶
100
Python¶
constant = substrate.get_constant('Randomness', 'MaxRandomWords')
MinBlockDelay¶
Local per-block VRF requests must be at least this many blocks after the block in which they were requested
Value¶
2
Python¶
constant = substrate.get_constant('Randomness', 'MinBlockDelay')