com.r3corda.contracts.clause / AbstractConserveAmount

# AbstractConserveAmount

`abstract class AbstractConserveAmount<S : FungibleAsset<T>, T : Any> : GroupClause<S, Issued<T>>`

Standardised clause for checking input/output balances of fungible assets. Requires that a Move command is provided, and errors if absent. Must be the last clause under a grouping clause; errors on no-match, ends on match.

### Constructors

<init> | `AbstractConserveAmount()` Standardised clause for checking input/output balances of fungible assets. Requires that a Move command is provided, and errors if absent. Must be the last clause under a grouping clause; errors on no-match, ends on match.

### Properties

ifMatched | `open val ifMatched: MatchBehaviour` Behaviour if this clause is not matches
ifNotMatched | `open val ifNotMatched: MatchBehaviour` Behaviour if this clause is matched
requiredCommands | `open val requiredCommands: Set<Class<out CommandData>>` Classes for commands which must ALL be present in transaction for this clause to be triggered

### Functions

verify | `open fun verify(tx: TransactionForContract, inputs: List<S>, outputs: List<S>, commands: Collection<AuthenticatedObject<CommandData>>, token: Issued<T>): Set<CommandData>`

### Inheritors

ConserveAmount | `class ConserveAmount : AbstractConserveAmount<State, Currency>`
ConserveAmount | `class ConserveAmount<P> : AbstractConserveAmount<State<P>, Terms<P>>` Generic move/exit clause for fungible assets