ChainBridge¶

Calls¶

acknowledge_proposal¶

See [Pallet::acknowledge_proposal].

Attributes¶

Name	Type
nonce	`DepositNonce`
src_id	`BridgeChainId`
r_id	`ResourceId`
call	`Box<<T as Config>::Proposal>`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'acknowledge_proposal', {
    'call': 'Call',
    'nonce': 'u64',
    'r_id': '[u8; 32]',
    'src_id': 'u8',
}
)

add_relayer¶

See [Pallet::add_relayer].

Attributes¶

Name	Type
v	`T::AccountId`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'add_relayer', {'v': 'AccountId'}
)

eval_vote_state¶

See [Pallet::eval_vote_state].

Attributes¶

Name	Type
nonce	`DepositNonce`
src_id	`BridgeChainId`
prop	`Box<<T as Config>::Proposal>`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'eval_vote_state', {
    'nonce': 'u64',
    'prop': 'Call',
    'src_id': 'u8',
}
)

handle_fungible_transfer¶

See [Pallet::handle_fungible_transfer].

Attributes¶

Name	Type
dest	`Vec<u8>`
amount	`BalanceOf<T>`
rid	`ResourceId`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'handle_fungible_transfer', {
    'amount': 'u128',
    'dest': 'Bytes',
    'rid': '[u8; 32]',
}
)

reject_proposal¶

See [Pallet::reject_proposal].

Attributes¶

Name	Type
nonce	`DepositNonce`
src_id	`BridgeChainId`
r_id	`ResourceId`
call	`Box<<T as Config>::Proposal>`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'reject_proposal', {
    'call': 'Call',
    'nonce': 'u64',
    'r_id': '[u8; 32]',
    'src_id': 'u8',
}
)

remove_relayer¶

See [Pallet::remove_relayer].

Attributes¶

Name	Type
v	`T::AccountId`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'remove_relayer', {'v': 'AccountId'}
)

set_threshold¶

See [Pallet::set_threshold].

Attributes¶

Name	Type
threshold	`u32`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'set_threshold', {'threshold': 'u32'}
)

update_fee¶

See [Pallet::update_fee].

Attributes¶

Name	Type
fee	`u128`
dest_id	`BridgeChainId`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'update_fee', {'dest_id': 'u8', 'fee': 'u128'}
)

whitelist_chain¶

See [Pallet::whitelist_chain].

Attributes¶

Name	Type
id	`BridgeChainId`

Python¶

call = substrate.compose_call(
    'ChainBridge', 'whitelist_chain', {'id': 'u8'}
)

Events¶

ChainWhitelisted¶

Chain now available for transfers (chain_id)

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`

FeeUpdated¶

Attributes¶

Name	Type	Composition
dest_id	`BridgeChainId`	`u8`
fee	`u128`	`u128`

FungibleTransfer¶

FungibleTransfer is for relaying fungibles (dest_id, nonce, resource_id, amount, recipient)

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`
None	`ResourceId`	`[u8; 32]`
None	`U256`	`scale_info::131`
None	`Vec<u8>`	`Bytes`

GenericTransfer¶

GenericTransfer is for a generic data payload (dest_id, nonce, resource_id, metadata)

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`
None	`ResourceId`	`[u8; 32]`
None	`Vec<u8>`	`Bytes`

NonFungibleTransfer¶

NonFungibleTransfer is for relaying NFTs (dest_id, nonce, resource_id, token_id, recipient, metadata)

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`
None	`ResourceId`	`[u8; 32]`
None	`Vec<u8>`	`Bytes`
None	`Vec<u8>`	`Bytes`
None	`Vec<u8>`	`Bytes`

ProposalApproved¶

Voting successful for a proposal

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`

ProposalFailed¶

Execution of call failed

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`

ProposalRejected¶

Voting rejected a proposal

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`

ProposalSucceeded¶

Execution of call succeeded

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`

RelayerAdded¶

Relayer added to set

Attributes¶

Name	Type	Composition
None	`T::AccountId`	`AccountId`

RelayerRemoved¶

Relayer removed from set

Attributes¶

Name	Type	Composition
None	`T::AccountId`	`AccountId`

RelayerThresholdChanged¶

Vote threshold has changed (new_threshold)

Attributes¶

Name	Type	Composition
None	`u32`	`u32`

VoteAgainst¶

Vot submitted against proposal

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`
None	`T::AccountId`	`AccountId`

VoteFor¶

Vote submitted in favour of proposal

Attributes¶

Name	Type	Composition
None	`BridgeChainId`	`u8`
None	`DepositNonce`	`u64`
None	`T::AccountId`	`AccountId`

Storage functions¶

BridgeEvents¶

Python¶

result = substrate.query(
    'ChainBridge', 'BridgeEvents', []
)

Return value¶

[
    {
        'FungibleTransfer': (
            'u8',
            'u64',
            '[u8; 32]',
            'scale_info::131',
            'Bytes',
        ),
        'GenericTransfer': ('u8', 'u64', '[u8; 32]', 'Bytes'),
        'NonFungibleTransfer': (
            'u8',
            'u64',
            '[u8; 32]',
            'Bytes',
            'Bytes',
            'Bytes',
        ),
    },
]

BridgeFee¶

Python¶

result = substrate.query(
    'ChainBridge', 'BridgeFee', ['u8']
)

Return value¶

'u128'

ChainNonces¶

Python¶

result = substrate.query(
    'ChainBridge', 'ChainNonces', ['u8']
)

Return value¶

'u64'

RelayerCount¶

Python¶

result = substrate.query(
    'ChainBridge', 'RelayerCount', []
)

Return value¶

'u32'

RelayerThreshold¶

Python¶

result = substrate.query(
    'ChainBridge', 'RelayerThreshold', []
)

Return value¶

'u32'

Relayers¶

Python¶

result = substrate.query(
    'ChainBridge', 'Relayers', ['AccountId']
)

Return value¶

'bool'

Votes¶

Python¶

result = substrate.query(
    'ChainBridge', 'Votes', ['u8', ('u64', 'Call')]
)

Return value¶

{
    'expiry': 'u32',
    'status': ('Initiated', 'Approved', 'Rejected'),
    'votes_against': ['AccountId'],
    'votes_for': ['AccountId'],
}

Constants¶

BridgeChainId¶

The identifier for this chain. This must be unique and must not collide with existing IDs within a set of bridged chains.

Value¶

Python¶

constant = substrate.get_constant('ChainBridge', 'BridgeChainId')

BridgeEventLimit¶

Maximum number of bridge events allowed to exist in a single block

Value¶

Python¶

constant = substrate.get_constant('ChainBridge', 'BridgeEventLimit')

ProposalLifetime¶

Value¶

Python¶

constant = substrate.get_constant('ChainBridge', 'ProposalLifetime')

ResourceIdGenerationSalt¶

Salt used to generation rid

Value¶

Python¶

constant = substrate.get_constant('ChainBridge', 'ResourceIdGenerationSalt')

Errors¶

AssetConversionFailed¶

Convertion failed from resource id

AssetNotRegistered¶

Assets not registered through pallet-assets or pallet-uniques

BridgeEventOverflow¶

Trying to push bridge event count more than BridgeEventLimit

CannotDepositAsset¶

Can not transfer assets to dest due to some reasons

CannotDetermineReservedLocation¶

Can not extract asset reserve location

CannotPayAsFee¶

Asset can not pay as fee

ChainAlreadyWhitelisted¶

Chain has already been enabled

ChainNotWhitelisted¶

Interactions with this chain is not permitted

DestUnrecognized¶

Can not extract dest location

ExtractAssetFailed¶

Unkonwn asset

ExtractDestFailed¶

Unknown destnation

FeeTooExpensive¶

Too expensive fee for withdrawn asset

InsufficientBalance¶

Infusficient balance to withdraw

InvalidChainId¶

Provided chain Id is not valid

InvalidFeeOption¶

Got wrong paremeter when update fee

InvalidThreshold¶

Relayer threshold cannot be 0

MustBeRelayer¶

Protected operation, must be performed by relayer

ProposalAlreadyComplete¶

Proposal has either failed or succeeded

ProposalAlreadyExists¶

A proposal with these parameters has already been submitted

ProposalDoesNotExist¶

No proposal with the ID was found

ProposalExpired¶

Lifetime of proposal has been exceeded

ProposalNotComplete¶

Cannot complete proposal, needs more votes

RelayerAlreadyExists¶

Relayer already in set

RelayerAlreadyVoted¶

Relayer has already submitted some vote for this proposal

RelayerInvalid¶

Provided accountId is not a relayer

TransactFailed¶

Transfer failed

Unimplemented¶

Function unimplemented

_ResourceDoesNotExist¶

Resource ID provided isn't mapped to anything

_ThresholdNotSet¶

Relayer threshold not set