Assets¶

Calls¶

approve_transfer¶

Approve an amount of asset for transfer by a delegated third-party account.

Origin must be Signed.

Ensures that ApprovalDeposit worth of Currency is reserved from signing account for the purpose of holding the approval. If some non-zero amount of assets is already approved from signing account to delegate, then it is topped up or unreserved to meet the right value.

NOTE: The signing account does not need to own amount of assets at the point of making this call.

id: The identifier of the asset.
delegate: The account to delegate permission to transfer asset.
amount: The amount of asset that may be transferred by delegate. If there is already an approval in place, then this acts additively.

Emits ApprovedTransfer on success.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
delegate	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'approve_transfer', {
    'amount': 'u128',
    'delegate': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
}
)

burn¶

Reduce the balance of who by as much as possible up to amount assets of id.

Origin must be Signed and the sender should be the Manager of the asset id.

Bails with NoAccount if the who is already dead.

id: The identifier of the asset to have some amount burned.
who: The account to be debited from.
amount: The maximum amount by which who's balance should be reduced.

Emits Burned with the actual amount burned. If this takes the balance to below the minimum for the asset, then the amount burned is increased to take it to zero.

Weight: O(1) Modes: Post-existence of who; Pre & post Zombie-status of who.

Attributes¶

Name	Type
id	`T::AssetId`
who	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'burn', {
    'amount': 'u128',
    'id': 'u32',
    'who': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

cancel_approval¶

Cancel all of some asset approved for delegated transfer by a third-party account.

Origin must be Signed and there must be an approval in place between signer and delegate.

Unreserves any deposit previously reserved by approve_transfer for the approval.

id: The identifier of the asset.
delegate: The account delegated permission to transfer asset.

Emits ApprovalCancelled on success.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
delegate	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'cancel_approval', {
    'delegate': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
}
)

clear_metadata¶

Clear the metadata for an asset.

Origin must be Signed and the sender should be the Owner of the asset id.

Any deposit is freed for the asset owner.

id: The identifier of the asset to clear.

Emits MetadataCleared.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`

Python¶

call = substrate.compose_call(
    'Assets', 'clear_metadata', {'id': 'u32'}
)

create¶

Issue a new class of fungible assets from a public origin.

This new asset class has no assets initially and its owner is the origin.

The origin must conform to the configured CreateOrigin and have sufficient funds free.

Funds of sender are reserved by AssetDeposit.

Parameters: - id: The identifier of the new asset. This must not be currently in use to identify an existing asset. - admin: The admin of this class of assets. The admin is the initial address of each member of the asset class's admin team. - min_balance: The minimum balance of this new asset that any single account must have. If an account's balance is reduced below this, then it collapses to zero.

Emits Created event when successful.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
admin	`AccountIdLookupOf<T>`
min_balance	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'create', {
    'admin': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'min_balance': 'u128',
}
)

destroy¶

Destroy a class of fungible assets.

The origin must conform to ForceOrigin or must be Signed and the sender must be the owner of the asset id.

id: The identifier of the asset to be destroyed. This must identify an existing asset.

Emits Destroyed event when successful.

NOTE: It can be helpful to first freeze an asset before destroying it so that you can provide accurate witness information and prevent users from manipulating state in a way that can make it harder to destroy.

Weight: O(c + p + a) where: - c = (witness.accounts - witness.sufficients) - s = witness.sufficients - a = witness.approvals

Attributes¶

Name	Type
id	`T::AssetId`
witness	`DestroyWitness`

Python¶

call = substrate.compose_call(
    'Assets', 'destroy', {
    'id': 'u32',
    'witness': {
        'accounts': 'u32',
        'approvals': 'u32',
        'sufficients': 'u32',
    },
}
)

force_asset_status¶

Alter the attributes of a given asset.

Origin must be ForceOrigin.

id: The identifier of the asset.
owner: The new Owner of this asset.
issuer: The new Issuer of this asset.
admin: The new Admin of this asset.
freezer: The new Freezer of this asset.
min_balance: The minimum balance of this new asset that any single account must have. If an account's balance is reduced below this, then it collapses to zero.
is_sufficient: Whether a non-zero balance of this asset is deposit of sufficient value to account for the state bloat associated with its balance storage. If set to true, then non-zero balances may be stored without a consumer reference (and thus an ED in the Balances pallet or whatever else is used to control user-account state growth).
is_frozen: Whether this asset class is frozen except for permissioned/admin instructions.

Emits AssetStatusChanged with the identity of the asset.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
owner	`AccountIdLookupOf<T>`
issuer	`AccountIdLookupOf<T>`
admin	`AccountIdLookupOf<T>`
freezer	`AccountIdLookupOf<T>`
min_balance	`T::Balance`
is_sufficient	`bool`
is_frozen	`bool`

Python¶

call = substrate.compose_call(
    'Assets', 'force_asset_status', {
    'admin': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'freezer': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'is_frozen': 'bool',
    'is_sufficient': 'bool',
    'issuer': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'min_balance': 'u128',
    'owner': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

force_cancel_approval¶

Cancel all of some asset approved for delegated transfer by a third-party account.

Origin must be either ForceOrigin or Signed origin with the signer being the Admin account of the asset id.

Unreserves any deposit previously reserved by approve_transfer for the approval.

id: The identifier of the asset.
delegate: The account delegated permission to transfer asset.

Emits ApprovalCancelled on success.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
owner	`AccountIdLookupOf<T>`
delegate	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'force_cancel_approval', {
    'delegate': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'owner': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

force_clear_metadata¶

Clear the metadata for an asset.

Origin must be ForceOrigin.

Any deposit is returned.

id: The identifier of the asset to clear.

Emits MetadataCleared.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`

Python¶

call = substrate.compose_call(
    'Assets', 'force_clear_metadata', {'id': 'u32'}
)

force_create¶

Issue a new class of fungible assets from a privileged origin.

This new asset class has no assets initially.

The origin must conform to ForceOrigin.

Unlike create, no funds are reserved.

id: The identifier of the new asset. This must not be currently in use to identify an existing asset.
owner: The owner of this class of assets. The owner has full superuser permissions over this asset, but may later change and configure the permissions using transfer_ownership and set_team.
min_balance: The minimum balance of this new asset that any single account must have. If an account's balance is reduced below this, then it collapses to zero.

Emits ForceCreated event when successful.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
owner	`AccountIdLookupOf<T>`
is_sufficient	`bool`
min_balance	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'force_create', {
    'id': 'u32',
    'is_sufficient': 'bool',
    'min_balance': 'u128',
    'owner': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

force_set_metadata¶

Force the metadata for an asset to some value.

Origin must be ForceOrigin.

Any deposit is left alone.

id: The identifier of the asset to update.
name: The user friendly name of this asset. Limited in length by StringLimit.
symbol: The exchange symbol for this asset. Limited in length by StringLimit.
decimals: The number of decimals this asset uses to represent one unit.

Emits MetadataSet.

Weight: O(N + S) where N and S are the length of the name and symbol respectively.

Attributes¶

Name	Type
id	`T::AssetId`
name	`Vec<u8>`
symbol	`Vec<u8>`
decimals	`u8`
is_frozen	`bool`

Python¶

call = substrate.compose_call(
    'Assets', 'force_set_metadata', {
    'decimals': 'u8',
    'id': 'u32',
    'is_frozen': 'bool',
    'name': 'Bytes',
    'symbol': 'Bytes',
}
)

force_transfer¶

Move some assets from one account to another.

Origin must be Signed and the sender should be the Admin of the asset id.

id: The identifier of the asset to have some amount transferred.
source: The account to be debited.
dest: The account to be credited.
amount: The amount by which the source's balance of assets should be reduced and dest's balance increased. The amount actually transferred may be slightly greater in the case that the transfer would otherwise take the source balance above zero but below the minimum balance. Must be greater than zero.

Emits Transferred with the actual amount transferred. If this takes the source balance to below the minimum for the asset, then the amount transferred is increased to take it to zero.

Weight: O(1) Modes: Pre-existence of dest; Post-existence of source; Account pre-existence of dest.

Attributes¶

Name	Type
id	`T::AssetId`
source	`AccountIdLookupOf<T>`
dest	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'force_transfer', {
    'amount': 'u128',
    'dest': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'source': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

freeze¶

Disallow further unprivileged transfers from an account.

Origin must be Signed and the sender should be the Freezer of the asset id.

id: The identifier of the asset to be frozen.
who: The account to be frozen.

Emits Frozen.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
who	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'freeze', {
    'id': 'u32',
    'who': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

freeze_asset¶

Disallow further unprivileged transfers for the asset class.

Origin must be Signed and the sender should be the Freezer of the asset id.

id: The identifier of the asset to be frozen.

Emits Frozen.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`

Python¶

call = substrate.compose_call(
    'Assets', 'freeze_asset', {'id': 'u32'}
)

mint¶

Mint assets of a particular class.

The origin must be Signed and the sender must be the Issuer of the asset id.

id: The identifier of the asset to have some amount minted.
beneficiary: The account to be credited with the minted assets.
amount: The amount of the asset to be minted.

Emits Issued event when successful.

Weight: O(1) Modes: Pre-existing balance of beneficiary; Account pre-existence of beneficiary.

Attributes¶

Name	Type
id	`T::AssetId`
beneficiary	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'mint', {
    'amount': 'u128',
    'beneficiary': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
}
)

refund¶

Return the deposit (if any) of an asset account.

The origin must be Signed.

id: The identifier of the asset for the account to be created.
allow_burn: If true then assets may be destroyed in order to complete the refund.

Emits Refunded event when successful.

Attributes¶

Name	Type
id	`T::AssetId`
allow_burn	`bool`

Python¶

call = substrate.compose_call(
    'Assets', 'refund', {'allow_burn': 'bool', 'id': 'u32'}
)

set_metadata¶

Set the metadata for an asset.

Origin must be Signed and the sender should be the Owner of the asset id.

Funds of sender are reserved according to the formula: MetadataDepositBase + MetadataDepositPerByte * (name.len + symbol.len) taking into account any already reserved funds.

id: The identifier of the asset to update.
name: The user friendly name of this asset. Limited in length by StringLimit.
symbol: The exchange symbol for this asset. Limited in length by StringLimit.
decimals: The number of decimals this asset uses to represent one unit.

Emits MetadataSet.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
name	`Vec<u8>`
symbol	`Vec<u8>`
decimals	`u8`

Python¶

call = substrate.compose_call(
    'Assets', 'set_metadata', {
    'decimals': 'u8',
    'id': 'u32',
    'name': 'Bytes',
    'symbol': 'Bytes',
}
)

set_team¶

Change the Issuer, Admin and Freezer of an asset.

Origin must be Signed and the sender should be the Owner of the asset id.

id: The identifier of the asset to be frozen.
issuer: The new Issuer of this asset.
admin: The new Admin of this asset.
freezer: The new Freezer of this asset.

Emits TeamChanged.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
issuer	`AccountIdLookupOf<T>`
admin	`AccountIdLookupOf<T>`
freezer	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'set_team', {
    'admin': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'freezer': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'issuer': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

thaw¶

Allow unprivileged transfers from an account again.

Origin must be Signed and the sender should be the Admin of the asset id.

id: The identifier of the asset to be frozen.
who: The account to be unfrozen.

Emits Thawed.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
who	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'thaw', {
    'id': 'u32',
    'who': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

thaw_asset¶

Allow unprivileged transfers for the asset again.

Origin must be Signed and the sender should be the Admin of the asset id.

id: The identifier of the asset to be thawed.

Emits Thawed.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`

Python¶

call = substrate.compose_call(
    'Assets', 'thaw_asset', {'id': 'u32'}
)

touch¶

Create an asset account for non-provider assets.

A deposit will be taken from the signer account.

origin: Must be Signed; the signer account must have sufficient funds for a deposit to be taken.
id: The identifier of the asset for the account to be created.

Emits Touched event when successful.

Attributes¶

Name	Type
id	`T::AssetId`

Python¶

call = substrate.compose_call(
    'Assets', 'touch', {'id': 'u32'}
)

transfer¶

Move some assets from the sender account to another.

Origin must be Signed.

id: The identifier of the asset to have some amount transferred.
target: The account to be credited.
amount: The amount by which the sender's balance of assets should be reduced and target's balance increased. The amount actually transferred may be slightly greater in the case that the transfer would otherwise take the sender balance above zero but below the minimum balance. Must be greater than zero.

Emits Transferred with the actual amount transferred. If this takes the source balance to below the minimum for the asset, then the amount transferred is increased to take it to zero.

Weight: O(1) Modes: Pre-existence of target; Post-existence of sender; Account pre-existence of target.

Attributes¶

Name	Type
id	`T::AssetId`
target	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'transfer', {
    'amount': 'u128',
    'id': 'u32',
    'target': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

transfer_approved¶

Transfer some asset balance from a previously delegated account to some third-party account.

Origin must be Signed and there must be an approval in place by the owner to the signer.

If the entire amount approved for transfer is transferred, then any deposit previously reserved by approve_transfer is unreserved.

id: The identifier of the asset.
owner: The account which previously approved for a transfer of at least amount and from which the asset balance will be withdrawn.
destination: The account to which the asset balance of amount will be transferred.
amount: The amount of assets to transfer.

Emits TransferredApproved on success.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
owner	`AccountIdLookupOf<T>`
destination	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'transfer_approved', {
    'amount': 'u128',
    'destination': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
    'id': 'u32',
    'owner': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

transfer_keep_alive¶

Move some assets from the sender account to another, keeping the sender account alive.

Origin must be Signed.

id: The identifier of the asset to have some amount transferred.
target: The account to be credited.
amount: The amount by which the sender's balance of assets should be reduced and target's balance increased. The amount actually transferred may be slightly greater in the case that the transfer would otherwise take the sender balance above zero but below the minimum balance. Must be greater than zero.

Emits Transferred with the actual amount transferred. If this takes the source balance to below the minimum for the asset, then the amount transferred is increased to take it to zero.

Weight: O(1) Modes: Pre-existence of target; Post-existence of sender; Account pre-existence of target.

Attributes¶

Name	Type
id	`T::AssetId`
target	`AccountIdLookupOf<T>`
amount	`T::Balance`

Python¶

call = substrate.compose_call(
    'Assets', 'transfer_keep_alive', {
    'amount': 'u128',
    'id': 'u32',
    'target': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

transfer_ownership¶

Change the Owner of an asset.

Origin must be Signed and the sender should be the Owner of the asset id.

id: The identifier of the asset.
owner: The new Owner of this asset.

Emits OwnerChanged.

Weight: O(1)

Attributes¶

Name	Type
id	`T::AssetId`
owner	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Assets', 'transfer_ownership', {
    'id': 'u32',
    'owner': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': (),
        'Raw': 'Bytes',
    },
}
)

Events¶

ApprovalCancelled¶

An approval for account delegate was cancelled by owner.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`
delegate	`T::AccountId`	`AccountId`

ApprovedTransfer¶

(Additional) funds have been approved for transfer to a destination account.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
source	`T::AccountId`	`AccountId`
delegate	`T::AccountId`	`AccountId`
amount	`T::Balance`	`u128`

AssetFrozen¶

Some asset asset_id was frozen.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`

AssetStatusChanged¶

An asset has had its attributes changed by the Force origin.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`

AssetThawed¶

Some asset asset_id was thawed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`

Burned¶

Some assets were destroyed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`
balance	`T::Balance`	`u128`

Created¶

Some asset class was created.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
creator	`T::AccountId`	`AccountId`
owner	`T::AccountId`	`AccountId`

Destroyed¶

An asset class was destroyed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`

ForceCreated¶

Some asset class was force-created.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`

Frozen¶

Some account who was frozen.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
who	`T::AccountId`	`AccountId`

Issued¶

Some assets were issued.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`
total_supply	`T::Balance`	`u128`

MetadataCleared¶

Metadata has been cleared for an asset.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`

MetadataSet¶

New metadata has been set for an asset.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
name	`Vec<u8>`	`Bytes`
symbol	`Vec<u8>`	`Bytes`
decimals	`u8`	`u8`
is_frozen	`bool`	`bool`

OwnerChanged¶

The owner changed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`

TeamChanged¶

The management team changed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
issuer	`T::AccountId`	`AccountId`
admin	`T::AccountId`	`AccountId`
freezer	`T::AccountId`	`AccountId`

Thawed¶

Some account who was thawed.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
who	`T::AccountId`	`AccountId`

Transferred¶

Some assets were transferred.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
from	`T::AccountId`	`AccountId`
to	`T::AccountId`	`AccountId`
amount	`T::Balance`	`u128`

TransferredApproved¶

An amount was transferred in its entirety from owner to destination by the approved delegate.

Attributes¶

Name	Type	Composition
asset_id	`T::AssetId`	`u32`
owner	`T::AccountId`	`AccountId`
delegate	`T::AccountId`	`AccountId`
destination	`T::AccountId`	`AccountId`
amount	`T::Balance`	`u128`

Storage functions¶

Account¶

The holdings of a specific account for a specific asset.

Python¶

result = substrate.query(
    'Assets', 'Account', ['u32', 'AccountId']
)

Return value¶

{
    'balance': 'u128',
    'extra': (),
    'is_frozen': 'bool',
    'reason': {
        'Consumer': None,
        'DepositHeld': 'u128',
        'DepositRefunded': None,
        'Sufficient': None,
    },
}

Approvals¶

Approved balance transfers. First balance is the amount approved for transfer. Second is the amount of T::Currency reserved for storing this. First key is the asset ID, second key is the owner and third key is the delegate.

Python¶

result = substrate.query(
    'Assets', 'Approvals', ['u32', 'AccountId', 'AccountId']
)

Return value¶

{'amount': 'u128', 'deposit': 'u128'}

Asset¶

Details of an asset.

Python¶

result = substrate.query(
    'Assets', 'Asset', ['u32']
)

Return value¶

{
    'accounts': 'u32',
    'admin': 'AccountId',
    'approvals': 'u32',
    'deposit': 'u128',
    'freezer': 'AccountId',
    'is_frozen': 'bool',
    'is_sufficient': 'bool',
    'issuer': 'AccountId',
    'min_balance': 'u128',
    'owner': 'AccountId',
    'sufficients': 'u32',
    'supply': 'u128',
}

Metadata¶

Metadata of an asset.

Python¶

result = substrate.query(
    'Assets', 'Metadata', ['u32']
)

Return value¶

{
    'decimals': 'u8',
    'deposit': 'u128',
    'is_frozen': 'bool',
    'name': 'Bytes',
    'symbol': 'Bytes',
}

Constants¶

ApprovalDeposit¶

The amount of funds that must be reserved when creating a new approval.

Value¶

10000000000000

Python¶

constant = substrate.get_constant('Assets', 'ApprovalDeposit')

AssetAccountDeposit¶

The amount of funds that must be reserved for a non-provider asset account to be maintained.

Value¶

10000000000000

Python¶

constant = substrate.get_constant('Assets', 'AssetAccountDeposit')

AssetDeposit¶

The basic amount of funds that must be reserved for an asset.

Value¶

10000000000000

Python¶

constant = substrate.get_constant('Assets', 'AssetDeposit')

MetadataDepositBase¶

The basic amount of funds that must be reserved when adding metadata to your asset.

Value¶

10000000000000

Python¶

constant = substrate.get_constant('Assets', 'MetadataDepositBase')

MetadataDepositPerByte¶

The additional funds that must be reserved for the number of bytes you store in your metadata.

Value¶

100000000000

Python¶

constant = substrate.get_constant('Assets', 'MetadataDepositPerByte')

StringLimit¶

The maximum length of a name or symbol stored on-chain.

Value¶

Python¶

constant = substrate.get_constant('Assets', 'StringLimit')

Errors¶

AlreadyExists¶

The asset-account already exists.

BadMetadata¶

Invalid metadata given.

BadWitness¶

Invalid witness data given.

BalanceLow¶

Account balance must be greater than or equal to the transfer amount.

Frozen¶

The origin account is frozen.

InUse¶

The asset ID is already taken.

MinBalanceZero¶

Minimum balance should be non-zero.

NoAccount¶

The account to alter does not exist.

NoDeposit¶

The asset-account doesn't have an associated deposit.

NoPermission¶

The signing account has no permission to do the operation.

NoProvider¶

Unable to increment the consumer reference counters on the account. Either no provider reference exists to allow a non-zero balance of a non-self-sufficient asset, or the maximum number of consumers has been reached.

Unapproved¶

No approval exists that would allow the transfer.

Unknown¶

The given asset ID is unknown.

WouldBurn¶

The operation would result in funds being burned.

WouldDie¶

The source account would not survive the transfer and it needs to stay alive.