TechnicalCommittee¶

Calls¶

close¶

Close a vote that is either approved, disapproved or whose voting period has ended.

May be called by any signed account in order to finish voting and close the proposal.

If called before the end of the voting period it will only close the vote if it is has enough votes to be approved or disapproved.

If called after the end of the voting period abstentions are counted as rejections unless there is a prime member set and the prime member cast an approval.

If the close operation completes successfully with disapproval, the transaction fee will be waived. Otherwise execution of the approved operation will be charged to the caller.

proposal_weight_bound: The maximum amount of weight consumed by executing the closed proposal.
length_bound: The upper bound for the length of the proposal in storage. Checked via storage::read so it is size_of::<u32>() == 4 larger than the pure length.

## Complexity - O(B + M + P1 + P2) where: - B is proposal size in bytes (length-fee-bounded) - M is members-count (code- and governance-bounded) - P1 is the complexity of proposal preimage. - P2 is proposal-count (code-bounded)

Attributes¶

Name	Type
proposal_hash	`T::Hash`
index	`ProposalIndex`
proposal_weight_bound	`Weight`
length_bound	`u32`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'close', {
    'index': 'u32',
    'length_bound': 'u32',
    'proposal_hash': 'scale_info::16',
    'proposal_weight_bound': {
        'proof_size': 'u64',
        'ref_time': 'u64',
    },
}
)

disapprove_proposal¶

Disapprove a proposal, close, and remove it from the system, regardless of its current state.

Must be called by the Root origin.

Parameters: * proposal_hash: The hash of the proposal that should be disapproved.

## Complexity O(P) where P is the number of max proposals

Attributes¶

Name	Type
proposal_hash	`T::Hash`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'disapprove_proposal', {'proposal_hash': 'scale_info::16'}
)

execute¶

Dispatch a proposal from a member using the Member origin.

Origin must be a member of the collective.

## Complexity: - O(B + M + P) where: - B is proposal size in bytes (length-fee-bounded) - M members-count (code-bounded) - P complexity of dispatching proposal

Attributes¶

Name	Type
proposal	`Box<<T as Config<I>>::Proposal>`
length_bound	`u32`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'execute', {
    'length_bound': 'u32',
    'proposal': 'Call',
}
)

propose¶

Add a new proposal to either be voted on or executed directly.

Requires the sender to be member.

threshold determines whether proposal is executed directly (threshold < 2) or put up for voting.

## Complexity - O(B + M + P1) or O(B + M + P2) where: - B is proposal size in bytes (length-fee-bounded) - M is members-count (code- and governance-bounded) - branching is influenced by threshold where: - P1 is proposal execution complexity (threshold < 2) - P2 is proposals-count (code-bounded) (threshold >= 2)

Attributes¶

Name	Type
threshold	`MemberCount`
proposal	`Box<<T as Config<I>>::Proposal>`
length_bound	`u32`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'propose', {
    'length_bound': 'u32',
    'proposal': 'Call',
    'threshold': 'u32',
}
)

set_members¶

Set the collective's membership.

new_members: The new member list. Be nice to the chain and provide it sorted.
prime: The prime member whose vote sets the default.
old_count: The upper bound for the previous number of members in storage. Used for weight estimation.

The dispatch of this call must be SetMembersOrigin.

NOTE: Does not enforce the expected MaxMembers limit on the amount of members, but the weight estimations rely on it to estimate dispatchable weight.

# WARNING:

The pallet-collective can also be managed by logic outside of the pallet through the implementation of the trait [ChangeMembers]. Any call to set_members must be careful that the member set doesn't get out of sync with other logic managing the member set.

## Complexity: - O(MP + N) where: - M old-members-count (code- and governance-bounded) - N new-members-count (code- and governance-bounded) - P proposals-count (code-bounded)

Attributes¶

Name	Type
new_members	`Vec<T::AccountId>`
prime	`Option<T::AccountId>`
old_count	`MemberCount`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'set_members', {
    'new_members': ['AccountId'],
    'old_count': 'u32',
    'prime': (None, 'AccountId'),
}
)

vote¶

Add an aye or nay vote for the sender to the given proposal.

Requires the sender to be a member.

Transaction fees will be waived if the member is voting on any particular proposal for the first time and the call is successful. Subsequent vote changes will charge a fee. ## Complexity - O(M) where M is members-count (code- and governance-bounded)

Attributes¶

Name	Type
proposal	`T::Hash`
index	`ProposalIndex`
approve	`bool`

Python¶

call = substrate.compose_call(
    'TechnicalCommittee', 'vote', {
    'approve': 'bool',
    'index': 'u32',
    'proposal': 'scale_info::16',
}
)

Events¶

Approved¶

A motion was approved by the required threshold.

Attributes¶

Name	Type	Composition
proposal_hash	`T::Hash`	`scale_info::16`

Closed¶

A proposal was closed because its threshold was reached or after its duration was up.

Attributes¶

Name	Type	Composition
proposal_hash	`T::Hash`	`scale_info::16`
yes	`MemberCount`	`u32`
no	`MemberCount`	`u32`

Disapproved¶

A motion was not approved by the required threshold.

Attributes¶

Name	Type	Composition
proposal_hash	`T::Hash`	`scale_info::16`

Executed¶

A motion was executed; result will be Ok if it returned without error.

Attributes¶

Name	Type	Composition
proposal_hash	`T::Hash`	`scale_info::16`
result	`DispatchResult`	{'Ok': (), 'Err': {'Other': None, 'CannotLookup': None, 'BadOrigin': None, 'Module': {'index': 'u8', 'error': '[u8; 4]'}, 'ConsumerRemaining': None, 'NoProviders': None, 'TooManyConsumers': None, 'Token': ('FundsUnavailable', 'OnlyProvider', 'BelowMinimum', 'CannotCreate', 'UnknownAsset', 'Frozen', 'Unsupported', 'CannotCreateHold', 'NotExpendable'), 'Arithmetic': ('Underflow', 'Overflow', 'DivisionByZero'), 'Transactional': ('LimitReached', 'NoLayer'), 'Exhausted': None, 'Corruption': None, 'Unavailable': None}}

MemberExecuted¶

A single member did some action; result will be Ok if it returned without error.

Attributes¶

Name	Type	Composition
proposal_hash	`T::Hash`	`scale_info::16`
result	`DispatchResult`	{'Ok': (), 'Err': {'Other': None, 'CannotLookup': None, 'BadOrigin': None, 'Module': {'index': 'u8', 'error': '[u8; 4]'}, 'ConsumerRemaining': None, 'NoProviders': None, 'TooManyConsumers': None, 'Token': ('FundsUnavailable', 'OnlyProvider', 'BelowMinimum', 'CannotCreate', 'UnknownAsset', 'Frozen', 'Unsupported', 'CannotCreateHold', 'NotExpendable'), 'Arithmetic': ('Underflow', 'Overflow', 'DivisionByZero'), 'Transactional': ('LimitReached', 'NoLayer'), 'Exhausted': None, 'Corruption': None, 'Unavailable': None}}

Proposed¶

A motion (given hash) has been proposed (by given account) with a threshold (given MemberCount).

Attributes¶

Name	Type	Composition
account	`T::AccountId`	`AccountId`
proposal_index	`ProposalIndex`	`u32`
proposal_hash	`T::Hash`	`scale_info::16`
threshold	`MemberCount`	`u32`

Voted¶

A motion (given hash) has been voted on by given account, leaving a tally (yes votes and no votes given respectively as MemberCount).

Attributes¶

Name	Type	Composition
account	`T::AccountId`	`AccountId`
proposal_hash	`T::Hash`	`scale_info::16`
voted	`bool`	`bool`
yes	`MemberCount`	`u32`
no	`MemberCount`	`u32`

Storage functions¶

Members¶

The current members of the collective. This is stored sorted (just by value).

Python¶

result = substrate.query(
    'TechnicalCommittee', 'Members', []
)

Return value¶

['AccountId']

Prime¶

The prime member that helps determine the default vote behavior in case of absentations.

Python¶

result = substrate.query(
    'TechnicalCommittee', 'Prime', []
)

Return value¶

'AccountId'

ProposalCount¶

Proposals so far.

Python¶

result = substrate.query(
    'TechnicalCommittee', 'ProposalCount', []
)

Return value¶

'u32'

ProposalOf¶

Actual proposal for a given hash, if it's current.

Python¶

result = substrate.query(
    'TechnicalCommittee', 'ProposalOf', ['scale_info::16']
)

Return value¶

'Call'

Proposals¶

The hashes of the active proposals.

Python¶

result = substrate.query(
    'TechnicalCommittee', 'Proposals', []
)

Return value¶

['scale_info::16']

Voting¶

Votes on a given proposal, if it is ongoing.

Python¶

result = substrate.query(
    'TechnicalCommittee', 'Voting', ['scale_info::16']
)

Return value¶

{'ayes': ['AccountId'], 'end': 'u32', 'index': 'u32', 'nays': ['AccountId'], 'threshold': 'u32'}

Constants¶

MaxProposalWeight¶

The maximum weight of a dispatch call that can be proposed and executed.

Value¶

{'proof_size': 5242880, 'ref_time': 500000000000}

Python¶

constant = substrate.get_constant('TechnicalCommittee', 'MaxProposalWeight')

Errors¶

AlreadyInitialized¶

Members are already initialized!

DuplicateProposal¶

Duplicate proposals not allowed

DuplicateVote¶

Duplicate vote ignored

NotMember¶

Account is not a member

ProposalMissing¶

Proposal must exist

TooEarly¶

The close call was made too early, before the end of the voting.

TooManyProposals¶

There can only be a maximum of MaxProposals active proposals.

WrongIndex¶

Mismatched index

WrongProposalLength¶

The given length bound for the proposal was too low.

WrongProposalWeight¶

The given weight bound for the proposal was too low.