Module polkadot_sdk_frame::traits::tokens::fungibles

The traits for sets of fungible tokens and any associated types.

Individual tokens in the fungibles set may be used when a fungible trait is expected using crate::traits::tokens::fungible::ItemOf.

Also see the frame_tokens reference docs for more information about the place of fungible traits in Substrate.

Modules

• approvals
  Inspect and Mutate traits for Asset approvals
• freeze
  The traits for putting freezes within a single fungible token class.
• hold
  The traits for putting holds within a single fungible token class.
• metadata
  Inspect and Mutate traits for Asset metadata
• roles
  Inspect traits for Asset roles

Structs

• DecreaseIssuance
  Simple handler for an imbalance drop which decreases the total issuance of the system by the imbalance amount. Used for leftover credit.
• Dust
  Special dust type which can be type-safely converted into a Credit.
• Imbalance
  An imbalance in the system, representing a divergence of recorded token supply from the sum of the balances of all accounts. This is must_use in order to ensure it gets handled (placing into an account, settling from an account or altering the supply).
• IncreaseIssuance
  Simple handler for an imbalance drop which increases the total issuance of the system by the imbalance amount. Used for leftover debt.
• UnionOf
  Type to combine two fungibles::* implementations into one union fungibles::* implementation.

Traits

• Balanced
  A fungible token class where any creation and deletion of tokens is semi-explicit and where the total supply is maintained automatically.
• BalancedHold
  Trait for slashing a fungible asset which can be place on hold.
• Create
  Trait for providing the ability to create new fungible assets.
• Destroy
  Trait for providing the ability to destroy existing fungible assets.
• HandleImbalanceDrop
  Handler for when an imbalance gets dropped. This could handle either a credit (negative) or debt (positive) imbalance.
• Inspect
  Trait for providing balance-inspection access to a set of named fungible assets.
• InspectEnumerable
  Interface for enumerating assets in existence or owned by a given account.
• InspectFreeze
  Trait for inspecting a fungible asset which can be frozen. Freezing is essentially setting a minimum balance below which the total balance (inclusive of any funds placed on hold) may not be normally allowed to drop. Generally, freezers will provide an “update” function such that if the total balance does drop below the limit, then the freezer can update their housekeeping accordingly.
• InspectHold
  Trait for inspecting a fungible asset whose accounts support partitioning and slashing.
• Mutate
  Trait for providing a basic fungible asset.
• MutateFreeze
  Trait for introducing, altering and removing locks to freeze an account’s funds so they never go below a set minimum.
• MutateHold
  Trait for mutating a fungible asset which can be placed on hold.
• Refund
  Trait for refunding the existence deposit of a target asset account.
• Unbalanced
  A fungible token class where the balance can be set arbitrarily.
• UnbalancedHold
  A fungible, holdable token class where the balance on hold can be set arbitrarily.

Type Aliases

• Credit
  Imbalance implying that the total_issuance value is greater than the sum of all account balances.
• Debt
  Imbalance implying that the total_issuance value is less than the sum of all account balances.