PoolSystem¶
Calls¶
close_epoch¶
Close the current epoch
Closing an epoch locks in all invest and redeem orders placed during the epoch, and causes all further invest and redeem orders to be set for the next epoch.
If all orders can be executed without violating any
pool constraints - which include maximum reserve and
the tranche risk buffers - the execution will also be
done. See execute_epoch
for details on epoch
execution.
If pool constraints would be violated by executing all
orders, the pool enters a submission period. During a
submission period, partial executions can be submitted
to be scored, and the best-scoring solution will
eventually be executed. See submit_solution
.
Attributes¶
Name | Type |
---|---|
pool_id | T::PoolId |
Python¶
call = substrate.compose_call(
'PoolSystem', 'close_epoch', {'pool_id': 'u64'}
)
execute_epoch¶
Execute an epoch for which a valid solution has been submitted.
- Mints or burns tranche tokens based on investments and redemptions
- Updates the portion of the reserve and loan balance assigned to each tranche, based on the investments and redemptions to those tranches.
Attributes¶
Name | Type |
---|---|
pool_id | T::PoolId |
Python¶
call = substrate.compose_call(
'PoolSystem', 'execute_epoch', {'pool_id': 'u64'}
)
set_max_reserve¶
Sets the maximum reserve for a pool
The caller must have the LiquidityAdmin
role in
order to invoke this extrinsic. This role is not
given to the pool creator by default, and must be
added with the Permissions pallet before this
extrinsic can be called.
Attributes¶
Name | Type |
---|---|
pool_id | T::PoolId |
max_reserve | T::Balance |
Python¶
call = substrate.compose_call(
'PoolSystem', 'set_max_reserve', {
'max_reserve': 'u128',
'pool_id': 'u64',
}
)
submit_solution¶
Submit a partial execution solution for a closed epoch
If the submitted solution is "better" than the previous best solution, it will replace it. Solutions are ordered such that solutions which do not violate constraints are better than those that do.
Once a valid solution has been submitted, the challenge time begins. The pool can be executed once the challenge time has expired.
Attributes¶
Name | Type |
---|---|
pool_id | T::PoolId |
solution | Vec<TrancheSolution> |
Python¶
call = substrate.compose_call(
'PoolSystem', 'submit_solution', {
'pool_id': 'u64',
'solution': [
{
'invest_fulfillment': 'u64',
'redeem_fulfillment': 'u64',
},
],
}
)
Events¶
Created¶
A pool was created.
Attributes¶
Name | Type | Composition |
---|---|---|
admin | T::AccountId |
AccountId |
depositor | T::AccountId |
AccountId |
pool_id | T::PoolId |
u64 |
essence | PoolEssenceOf<T> |
{'currency': {'Native': None, 'Tranche': ('u64', '[u8; 16]'), None: None, 'AUSD': None, 'ForeignAsset': 'u32', 'Staking': ('BlockRewards',), 'LocalAsset': 'u32'}, 'max_reserve': 'u128', 'max_nav_age': 'u64', 'min_epoch_time': 'u64', 'tranches': [{'currency': {'pool_id': 'u64', 'tranche_id': '[u8; 16]'}, 'ty': {'Residual': None, 'NonResidual': {'interest_rate_per_sec': 'u128', 'min_risk_buffer': 'u64'}}, 'metadata': {'token_name': 'Bytes', 'token_symbol': 'Bytes'}}]} |
EpochClosed¶
An epoch was closed.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
epoch_id | T::EpochId |
u32 |
EpochExecuted¶
An epoch was executed.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
epoch_id | T::EpochId |
u32 |
MaxReserveSet¶
The max reserve was updated.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
NegativeBalanceSheet¶
The PoolFeesNAV exceeds the sum of the AUM and the total reserve of the pool
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
nav_aum | T::Balance |
u128 |
nav_fees | T::Balance |
u128 |
reserve | T::Balance |
u128 |
ProposedChange¶
A change was proposed.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
change_id | T::Hash |
scale_info::12 |
change | T::RuntimeChange |
{'Loans': {'Loan': ('u64', {'Maturity': {'Fixed': 'InnerStruct'}, 'MaturityExtension': 'u64', 'InterestRate': {'Fixed': 'InnerStruct'}, 'InterestPayments': ('None',), 'PayDownSchedule': ('None',), 'Internal': {'ValuationMethod': 'scale_info::453', 'ProbabilityOfDefault': 'u128', 'LossGivenDefault': 'u128', 'DiscountRate': 'scale_info::449'}}), 'Policy': [{'triggers': 'scale_info::405', 'status': 'scale_info::407'}], 'TransferDebt': ('u64', 'u64', {'principal': {'Internal': 'u128', 'External': 'scale_info::462'}, 'interest': 'u128', 'unscheduled': 'u128'}, {'Internal': 'u128', 'External': {'quantity': 'u128', 'settlement_price': 'u128'}})}, 'OracleCollection': {'CollectionInfo': {'value_lifetime': (None, 'u64'), 'min_feeders': 'u32', 'feeders': 'scale_info::161'}}, 'PoolFee': {'AppendFee': ('u64', ('Top',), {'destination': 'AccountId', 'editor': {'Root': None, 'Account': 'AccountId'}, 'fee_type': {'Fixed': 'InnerStruct', 'ChargedUpTo': 'InnerStruct'}})}, '_Unreachable': None} |
Rebalanced¶
The tranches were rebalanced.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
SolutionSubmitted¶
An epoch was executed.
Attributes¶
Name | Type | Composition |
---|---|---|
pool_id | T::PoolId |
u64 |
epoch_id | T::EpochId |
u32 |
solution | EpochSolution<T::Balance, T::MaxTranches> |
{'Healthy': {'solution': [{'invest_fulfillment': 'u64', 'redeem_fulfillment': 'u64'}], 'score': 'u128'}, 'Unhealthy': {'state': [('MaxReserveViolated', 'MinRiskBufferViolated')], 'solution': [{'invest_fulfillment': 'u64', 'redeem_fulfillment': 'u64'}], 'risk_buffer_improvement_scores': (None, ['u128']), 'reserve_improvement_score': (None, 'u128')}} |
Updated¶
A pool was updated.
Attributes¶
Name | Type | Composition |
---|---|---|
id | T::PoolId |
u64 |
old | PoolEssenceOf<T> |
{'currency': {'Native': None, 'Tranche': ('u64', '[u8; 16]'), None: None, 'AUSD': None, 'ForeignAsset': 'u32', 'Staking': ('BlockRewards',), 'LocalAsset': 'u32'}, 'max_reserve': 'u128', 'max_nav_age': 'u64', 'min_epoch_time': 'u64', 'tranches': [{'currency': {'pool_id': 'u64', 'tranche_id': '[u8; 16]'}, 'ty': {'Residual': None, 'NonResidual': {'interest_rate_per_sec': 'u128', 'min_risk_buffer': 'u64'}}, 'metadata': {'token_name': 'Bytes', 'token_symbol': 'Bytes'}}]} |
new | PoolEssenceOf<T> |
{'currency': {'Native': None, 'Tranche': ('u64', '[u8; 16]'), None: None, 'AUSD': None, 'ForeignAsset': 'u32', 'Staking': ('BlockRewards',), 'LocalAsset': 'u32'}, 'max_reserve': 'u128', 'max_nav_age': 'u64', 'min_epoch_time': 'u64', 'tranches': [{'currency': {'pool_id': 'u64', 'tranche_id': '[u8; 16]'}, 'ty': {'Residual': None, 'NonResidual': {'interest_rate_per_sec': 'u128', 'min_risk_buffer': 'u64'}}, 'metadata': {'token_name': 'Bytes', 'token_symbol': 'Bytes'}}]} |
Storage functions¶
AccountDeposit¶
Python¶
result = substrate.query(
'PoolSystem', 'AccountDeposit', ['AccountId']
)
Return value¶
'u128'
EpochExecution¶
Python¶
result = substrate.query(
'PoolSystem', 'EpochExecution', ['u64']
)
Return value¶
{
'best_submission': (
None,
{
'Healthy': {'score': 'u128', 'solution': ['scale_info::423']},
'Unhealthy': {
'reserve_improvement_score': (None, 'u128'),
'risk_buffer_improvement_scores': (None, ['u128']),
'solution': ['scale_info::423'],
'state': ['scale_info::502'],
},
},
),
'challenge_period_end': (None, 'u32'),
'epoch': 'u32',
'nav': {'nav_aum': 'u128', 'nav_fees': 'u128'},
'tranches': {
'tranches': [
{
'currency': 'scale_info::149',
'invest': 'u128',
'min_risk_buffer': 'u64',
'price': 'u128',
'redeem': 'u128',
'seniority': 'u32',
'supply': 'u128',
},
],
},
}
NotedChange¶
Python¶
result = substrate.query(
'PoolSystem', 'NotedChange', ['u64', 'scale_info::12']
)
Return value¶
{
'change': {
'Loans': {
'Loan': (
'u64',
{
'InterestPayments': 'scale_info::446',
'InterestRate': 'scale_info::449',
'Internal': 'scale_info::465',
'Maturity': 'scale_info::445',
'MaturityExtension': 'u64',
'PayDownSchedule': 'scale_info::447',
},
),
'Policy': ['scale_info::401'],
'TransferDebt': (
'u64',
'u64',
{
'interest': 'u128',
'principal': 'scale_info::461',
'unscheduled': 'u128',
},
{'External': 'scale_info::462', 'Internal': 'u128'},
),
},
'OracleCollection': {
'CollectionInfo': {
'feeders': 'scale_info::161',
'min_feeders': 'u32',
'value_lifetime': (None, 'u64'),
},
},
'PoolFee': {
'AppendFee': (
'u64',
('Top', ),
{
'destination': 'AccountId',
'editor': 'scale_info::286',
'fee_type': 'scale_info::287',
},
),
},
'_Unreachable': None,
},
'submitted_time': 'u64',
}
Pool¶
Python¶
result = substrate.query(
'PoolSystem', 'Pool', ['u64']
)
Return value¶
{
'currency': {
'AUSD': None,
'ForeignAsset': 'u32',
'LocalAsset': 'u32',
'Native': None,
'Staking': ('BlockRewards', ),
'Tranche': ('u64', '[u8; 16]'),
None: None,
},
'epoch': {'current': 'u32', 'last_closed': 'u64', 'last_executed': 'u32'},
'parameters': {'max_nav_age': 'u64', 'min_epoch_time': 'u64'},
'reserve': {'available': 'u128', 'max': 'u128', 'total': 'u128'},
'status': ('Open', ),
'tranches': {
'ids': ['[u8; 16]'],
'salt': ('u64', 'u64'),
'tranches': [
{
'currency': 'scale_info::149',
'debt': 'u128',
'last_updated_interest': 'u64',
'loss': 'u128',
'ratio': 'u64',
'reserve': 'u128',
'seniority': 'u32',
'tranche_type': 'scale_info::395',
},
],
},
}
PoolDeposit¶
Python¶
result = substrate.query(
'PoolSystem', 'PoolDeposit', ['u64']
)
Return value¶
{'deposit': 'u128', 'depositor': 'AccountId'}
ScheduledUpdate¶
Python¶
result = substrate.query(
'PoolSystem', 'ScheduledUpdate', ['u64']
)
Return value¶
{
'changes': {
'max_nav_age': {'NewValue': 'u64', 'NoChange': None},
'min_epoch_time': {'NewValue': 'u64', 'NoChange': None},
'tranche_metadata': {'NewValue': ['scale_info::397'], 'NoChange': None},
'tranches': {'NewValue': ['scale_info::415'], 'NoChange': None},
},
'submitted_at': 'u64',
}
Constants¶
ChallengeTime¶
Challenge time
Value¶
150
Python¶
constant = substrate.get_constant('PoolSystem', 'ChallengeTime')
DefaultMaxNAVAge¶
Value¶
0
Python¶
constant = substrate.get_constant('PoolSystem', 'DefaultMaxNAVAge')
DefaultMinEpochTime¶
Pool parameter defaults
Value¶
85800
Python¶
constant = substrate.get_constant('PoolSystem', 'DefaultMinEpochTime')
MaxNAVAgeUpperBound¶
Value¶
0
Python¶
constant = substrate.get_constant('PoolSystem', 'MaxNAVAgeUpperBound')
MaxTokenNameLength¶
Max length for a tranche token name
Value¶
128
Python¶
constant = substrate.get_constant('PoolSystem', 'MaxTokenNameLength')
MaxTokenSymbolLength¶
Max length for a tranche token symbol
Value¶
32
Python¶
constant = substrate.get_constant('PoolSystem', 'MaxTokenSymbolLength')
MaxTranches¶
Max number of Tranches
Value¶
5
Python¶
constant = substrate.get_constant('PoolSystem', 'MaxTranches')
MinEpochTimeLowerBound¶
Pool parameter bounds
Value¶
3600
Python¶
constant = substrate.get_constant('PoolSystem', 'MinEpochTimeLowerBound')
MinEpochTimeUpperBound¶
Value¶
2592000
Python¶
constant = substrate.get_constant('PoolSystem', 'MinEpochTimeUpperBound')
MinUpdateDelay¶
Pool update settings
Value¶
604800
Python¶
constant = substrate.get_constant('PoolSystem', 'MinUpdateDelay')
PalletId¶
Value¶
'0x726f632f706f6f6c'
Python¶
constant = substrate.get_constant('PoolSystem', 'PalletId')
PalletIndex¶
The immutable index of this pallet when instantiated within the context of a runtime where it is used.
Value¶
181
Python¶
constant = substrate.get_constant('PoolSystem', 'PalletIndex')
PoolDeposit¶
The amount that must be reserved to create a pool
Value¶
1000000000000000000000
Python¶
constant = substrate.get_constant('PoolSystem', 'PoolDeposit')
Errors¶
CannotAddOrRemoveTranches¶
Adding & removing tranches is not supported
ChallengeTimeHasNotPassed¶
Attempted to execute an epoch too early
ChangeNotFound¶
The external change was not found for the specified ChangeId.
ChangeNotReady¶
The external change was found for is not ready yet to be released.
EpochNotExecutedYet¶
Epoch needs to be executed before you can collect
FailedToRegisterTrancheMetadata¶
Registering the metadata for a tranche threw an error
FailedToUpdateTrancheMetadata¶
Updating the metadata for a tranche threw an error
InSubmissionPeriod¶
Cannot be called while the pool is in a submission period
InsufficientCurrency¶
Insufficient currency available for desired operation
InvalidCurrency¶
A user has tried to create a pool with an invalid currency
InvalidJuniorTranche¶
Attempted to create a pool without a junior tranche
InvalidSolution¶
The provided solution is not a valid one
InvalidTrancheId¶
Invalid TrancheId passed. In most cases out-of-bound index
InvalidTrancheSeniority¶
Invalid tranche seniority value * seniority MUST be smaller number of tranches * MUST be increasing per tranche
InvalidTrancheStructure¶
Attempted to create a tranche structure where * non-decreasing interest rate per tranche
InvalidTrancheUpdate¶
Pre-requirements for a TrancheUpdate are not met for example: Tranche changed but not its metadata or vice versa
MetadataForCurrencyNotFound¶
No metada for the given currency found
MinEpochTimeHasNotPassed¶
Attempted to close an epoch too early
NAVTooOld¶
Attempted to close an epoch with an out of date NAV
NoNAV¶
The NAV was not available
NoScheduledUpdate¶
No update for the pool is scheduled
NoSolutionAvailable¶
No solution has yet been provided for the epoch
NoSuchPool¶
Attempted an operation on a pool which does not exist
NotInSubmissionPeriod¶
Attempted to solve a pool which is not in a submission period
NotNewBestSubmission¶
Submitted solution is not an improvement
PoolInUse¶
A pool with this ID is already in use
PoolParameterBoundViolated¶
One of the runtime-level pool parameter bounds was violated
RiskBufferViolated¶
Risk Buffer validation failed
ScheduledTimeHasNotPassed¶
Scheduled time for this update is in the future
TooManyTranches¶
The requested tranche configuration has too many tranches
TrancheId¶
A Tranche ID cannot be converted to an address
TrancheSymbolNameTooLong¶
The given tranche symbol name exceeds the length limit
TrancheTokenNameTooLong¶
The given tranche token name exceeds the length limit
UpdatePrerequesitesNotFulfilled¶
Update cannot be fulfilled yet
WipedOut¶
Closing the epoch now would wipe out the junior tranche