Struct casper_execution_engine::core::runtime::Runtime

pub struct Runtime<'a, R> { /* private fields */ }

Represents the runtime properties of a WASM execution.

Implementations

impl<'a, R> Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

pub fn call_contract( &mut self, contract_hash: ContractHash, entry_point_name: &str, args: RuntimeArgs ) -> Result<CLValue, Error>

Calls contract living under a key, with supplied args.

pub fn call_versioned_contract( &mut self, contract_package_hash: ContractPackageHash, contract_version: Option<ContractVersion>, entry_point_name: String, args: RuntimeArgs ) -> Result<CLValue, Error>

Calls version of the contract living at key, invoking method with supplied args. This function also checks the args conform with the types given in the contract header.

pub fn take_host_buffer(&mut self) -> Option<CLValue>

If host_buffer set, clears the host_buffer and returns value, else None

Trait Implementations

impl<'a, R> AccountProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_main_purse(&mut self) -> Result<URef, ApiError>

Get currently executing account’s purse.

impl<'a, R> AccountProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_main_purse(&self) -> Result<URef, Error>

Get currently executing account’s purse.

impl<'a, R> Auction for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_era_validators( &mut self ) -> Result<BTreeMap<EraId, BTreeMap<PublicKey, U512, Global>, Global>, Error>

Returns active validators and auction winners for a number of future eras determined by the configured auction_delay.

fn read_seigniorage_recipients( &mut self ) -> Result<BTreeMap<PublicKey, SeigniorageRecipient, Global>, Error>

Returns validators in era_validators, mapped to their bids or founding stakes, delegation rates and lists of delegators together with their delegated quantities from delegators. This function is publicly accessible, but intended for system use by the Handle Payment contract, because this data is necessary for distributing seigniorage.

fn add_bid( &mut self, public_key: PublicKey, delegation_rate: u8, amount: U512 ) -> Result<U512, ApiError>

This entry point adds or modifies an entry in the Key::Bid section of the global state and creates (or tops off) a bid purse. Post genesis, any new call on this entry point causes a non-founding validator in the system to exist.

fn withdraw_bid( &mut self, public_key: PublicKey, amount: U512 ) -> Result<U512, Error>

For a non-founder validator, this method simply decreases a stake.

fn delegate( &mut self, delegator_public_key: PublicKey, validator_public_key: PublicKey, amount: U512, max_delegator_size_limit: usize, minimum_delegation_amount: u64 ) -> Result<U512, ApiError>

Adds a new delegator to delegators or increases its current stake. If the target validator is missing, the function call returns an error and does nothing.

fn undelegate( &mut self, delegator_public_key: PublicKey, validator_public_key: PublicKey, amount: U512 ) -> Result<U512, Error>

Removes specified amount of motes (or the value from the collection altogether, if the remaining amount is 0) from the entry in delegators map for given validator and creates a new unbonding request to the queue.

fn slash( &mut self, validator_public_keys: Vec<PublicKey, Global> ) -> Result<(), Error>

Slashes each validator.

fn run_auction( &mut self, era_end_timestamp_millis: u64, evicted_validators: Vec<PublicKey, Global> ) -> Result<(), Error>

Takes active_bids and delegators to construct a list of validators’ total bids (their own added to their delegators’) ordered by size from largest to smallest, then takes the top N (number of auction slots) bidders and replaces era_validators with these.

fn distribute( &mut self, reward_factors: BTreeMap<PublicKey, u64, Global> ) -> Result<(), Error>

Mint and distribute seigniorage rewards to validators and their delegators, according to reward_factors returned by the consensus component.

fn read_era_id(&mut self) -> Result<EraId, Error>

Reads current era id.

fn activate_bid(&mut self, validator_public_key: PublicKey) -> Result<(), Error>

Activates a given validator’s bid. To be used when a validator has been marked as inactive by consensus (aka “evicted”).

impl<'a, R> Externals for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn invoke_index( &mut self, index: usize, args: RuntimeArgs<'_> ) -> Result<Option<RuntimeValue>, Trap>

Perform invoke of a host function by specified index.

impl<'a, R> HandlePayment for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_payment_purse(&self) -> Result<URef, Error>

Get payment purse.

fn set_refund_purse(&mut self, purse: URef) -> Result<(), Error>

Set refund purse.

fn get_refund_purse(&self) -> Result<Option<URef>, Error>

Get refund purse.

fn finalize_payment( &mut self, amount_spent: U512, account: AccountHash, target: URef ) -> Result<(), Error>

Finalize payment with amount_spent and a given account.

impl<'a, R> HandlePaymentProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_payment_purse(&mut self) -> Result<URef, ApiError>

Get payment purse for given deploy.

impl<'a, R> Mint for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn mint(&mut self, initial_balance: U512) -> Result<URef, Error>

Mint new token with given initial_balance balance. Returns new purse on success, otherwise an error.

fn reduce_total_supply(&mut self, amount: U512) -> Result<(), Error>

Reduce total supply by amount. Returns unit on success, otherwise an error.

fn balance(&mut self, purse: URef) -> Result<Option<U512>, Error>

Read balance of given purse.

fn transfer( &mut self, maybe_to: Option<AccountHash>, source: URef, target: URef, amount: U512, id: Option<u64> ) -> Result<(), Error>

Transfers amount of tokens from source purse to a target purse.

fn read_base_round_reward(&mut self) -> Result<U512, Error>

Retrieves the base round reward.

fn mint_into_existing_purse( &mut self, existing_purse: URef, amount: U512 ) -> Result<(), Error>

Mint amount new token into existing_purse. Returns unit on success, otherwise an error.

impl<'a, R> MintProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn transfer_purse_to_purse( &mut self, source: URef, target: URef, amount: U512 ) -> Result<(), ApiError>

Transfer amount of tokens from source purse to a target purse.

impl<'a, R> MintProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn transfer_purse_to_account( &mut self, source: URef, target: AccountHash, amount: U512 ) -> Result<TransferredTo, Error>

Transfer amount from source purse to a target account.

fn transfer_purse_to_purse( &mut self, source: URef, target: URef, amount: U512 ) -> Result<(), Error>

Transfer amount from source purse to a target purse.

fn balance(&mut self, purse: URef) -> Result<Option<U512>, Error>

Checks balance of a purse. Returns None if given purse does not exist.

impl<'a, R> MintProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn mint_transfer_direct( &mut self, to: Option<AccountHash>, source: URef, target: URef, amount: U512, id: Option<u64> ) -> Result<Result<(), Error>, Error>

Allows optimized auction and mint interaction. Intended to be used only by system contracts to manage staked purses. NOTE: Never expose this through FFI.

fn unbond(&mut self, unbonding_purse: &UnbondingPurse) -> Result<(), Error>

Returns successfully unbonded stake to origin account.

fn mint_into_existing_purse( &mut self, amount: U512, existing_purse: URef ) -> Result<(), Error>

Mint amount new token into existing_purse. Returns unit on success, otherwise an error.

fn create_purse(&mut self) -> Result<URef, Error>

Creates new purse.

fn get_balance(&mut self, purse: URef) -> Result<Option<U512>, Error>

Gets purse balance.

fn read_base_round_reward(&mut self) -> Result<U512, Error>

Reads the base round reward.

fn mint(&mut self, amount: U512) -> Result<URef, Error>

Mints new token with given initial_balance balance. Returns new purse on success, otherwise an error.

fn reduce_total_supply(&mut self, amount: U512) -> Result<(), Error>

Reduce total supply by amount. Returns unit on success, otherwise an error.

impl<'a, R> RuntimeProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_key(&self, name: &str) -> Option<Key>

Get named key under a name.

fn put_key(&mut self, name: &str, key: Key) -> Result<(), Error>

Put key under a name.

fn remove_key(&mut self, name: &str) -> Result<(), Error>

Remove a named key by name.

fn get_phase(&self) -> Phase

Get current execution phase.

fn get_block_time(&self) -> BlockTime

Get current block time.

fn get_caller(&self) -> AccountHash

Get caller.

impl<'a, R> RuntimeProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_caller(&self) -> AccountHash

This method should return the caller of the current context.

fn get_immediate_caller(&self) -> Option<&CallStackElement>

This method should return the immediate caller of the current context.

fn get_phase(&self) -> Phase

Gets execution phase

fn put_key(&mut self, name: &str, key: Key) -> Result<(), Error>

This method should handle storing given Key under name.

fn get_key(&self, name: &str) -> Option<Key>

This method should handle obtaining a given named Key under a name.

fn get_approved_spending_limit(&self) -> U512

Returns approved CSPR spending limit.

fn sub_approved_spending_limit(&mut self, transferred: U512)

Signal to host that transferred amount of tokens has been transferred.

fn get_main_purse(&self) -> URef

Returns main purse of the sender account.

impl<'a, R> RuntimeProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn get_caller(&self) -> AccountHash

This method should return the caller of the current context.

fn is_allowed_session_caller(&self, account_hash: &AccountHash) -> bool

Checks if account_hash matches the active session’s account.

fn named_keys_get(&self, name: &str) -> Option<Key>

Gets named key under a name.

fn get_keys(&mut self, key_tag: &KeyTag) -> Result<BTreeSet<Key>, Error>

Gets keys in a given keyspace

fn blake2b<T: AsRef<[u8]>>(&self, data: T) -> [u8; 32]

Returns a 32-byte BLAKE2b digest

impl<'a, R> StandardPayment for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn pay(&mut self, amount: U512) -> Result<(), ApiError>

Pay amount to a payment purse.

impl<'a, R> StorageProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn read<T: FromBytes + CLTyped>( &mut self, uref: URef ) -> Result<Option<T>, Error>

Reads data from URef.

fn write<T: ToBytes + CLTyped>( &mut self, uref: URef, value: T ) -> Result<(), Error>

Writes data to `URef.

fn write_seigniorage_recipients_snapshot( &mut self, uref: URef, snapshot: SeigniorageRecipientsSnapshot ) -> Result<(), Error>

Writes a SeigniorageRecipientsSnapshot to global state and charges for bytes stored.

fn read_bid(&mut self, account_hash: &AccountHash) -> Result<Option<Bid>, Error>

Reads Bid at account hash derived from given public key

fn write_bid( &mut self, account_hash: AccountHash, bid: Bid ) -> Result<(), Error>

Writes given Bid at account hash derived from given public key

fn read_withdraw( &mut self, account_hash: &AccountHash ) -> Result<Vec<UnbondingPurse>, Error>

Reads collection of UnbondingPurses at account hash derived from given public key

fn write_withdraw( &mut self, account_hash: AccountHash, unbonding_purses: Vec<UnbondingPurse> ) -> Result<(), Error>

Writes given UnbondingPurses at account hash derived from given public key

fn record_era_info( &mut self, _era_id: EraId, era_summary: EraInfo ) -> Result<(), Error>

Records era summary.

impl<'a, R> StorageProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn new_uref<T: CLTyped + ToBytes>(&mut self, init: T) -> Result<URef, Error>

Create new URef.

fn read<T: CLTyped + FromBytes>( &mut self, uref: URef ) -> Result<Option<T>, Error>

Read data from URef.

fn write<T: CLTyped + ToBytes>( &mut self, uref: URef, value: T ) -> Result<(), Error>

Write data under a URef.

fn add<T: CLTyped + ToBytes>( &mut self, uref: URef, value: T ) -> Result<(), Error>

Add data to a URef.

fn read_balance(&mut self, uref: URef) -> Result<Option<U512>, Error>

Read balance.

fn write_balance(&mut self, uref: URef, balance: U512) -> Result<(), Error>

Write balance.

fn add_balance(&mut self, uref: URef, value: U512) -> Result<(), Error>

Add amount to an existing balance.

impl<'a, R> SystemProvider for Runtime<'a, R>where R: StateReader<Key, StoredValue>, R::Error: Into<Error>,

fn record_transfer( &mut self, maybe_to: Option<AccountHash>, source: URef, target: URef, amount: U512, id: Option<u64> ) -> Result<(), Error>

Records a transfer.