Function diem_transaction_builder::stdlib::encode_preburn_script

source ·

pub fn encode_preburn_script(token: TypeTag, amount: u64) -> Script

Expand description

Summary

Moves a specified number of coins in a given currency from the account’s balance to its preburn area after which the coins may be burned. This transaction may be sent by any account that holds a balance and preburn area in the specified currency.

Technical Description

Moves the specified amount of coins in Token currency from the sending account’s DiemAccount::Balance<Token> to the Diem::Preburn<Token> published under the same account. account must have both of these resources published under it at the start of this transaction in order for it to execute successfully.

Events

Successful execution of this script emits two events:

DiemAccount::SentPaymentEvent on account’s DiemAccount::DiemAccount sent_events handle with the payee and payer fields being account’s address; and
A Diem::PreburnEvent with Token’s currency code on the Diem::CurrencyInfo<Token’s preburn_events handle for Token and with preburn_address set to account’s address.

Parameters

Name	Type	Description
`Token`	Type	The Move type for the `Token` currency being moved to the preburn area. `Token` must be an already-registered currency on-chain.
`account`	`&signer`	The signer reference of the sending account.
`amount`	`u64`	The amount in `Token` to be moved to the preburn area.

Common Abort Conditions

Error Category	Error Reason	Description
`Errors::NOT_PUBLISHED`	`Diem::ECURRENCY_INFO`	The `Token` is not a registered currency on-chain.
`Errors::INVALID_STATE`	`DiemAccount::EWITHDRAWAL_CAPABILITY_ALREADY_EXTRACTED`	The withdrawal capability for `account` has already been extracted.
`Errors::LIMIT_EXCEEDED`	`DiemAccount::EINSUFFICIENT_BALANCE`	`amount` is greater than `payer`’s balance in `Token`.
`Errors::NOT_PUBLISHED`	`DiemAccount::EPAYER_DOESNT_HOLD_CURRENCY`	`account` doesn’t hold a balance in `Token`.
`Errors::NOT_PUBLISHED`	`Diem::EPREBURN`	`account` doesn’t have a `Diem::Preburn<Token>` resource published under it.
`Errors::INVALID_STATE`	`Diem::EPREBURN_OCCUPIED`	The `value` field in the `Diem::Preburn<Token>` resource under the sender is non-zero.
`Errors::NOT_PUBLISHED`	`Roles::EROLE_ID`	The `account` did not have a role assigned to it.
`Errors::REQUIRES_ROLE`	`Roles::EDESIGNATED_DEALER`	The `account` did not have the role of DesignatedDealer.