Safe Haskell	Safe-Inferred
Language	Haskell2010

Hydra.Chain.Direct.Wallet

Description

Companion tiny-wallet for the direct chain component. This module provide some useful utilities to tracking the wallet's UTXO, and accessing it

Synopsis

type Address = Addr StandardCrypto
type TxIn = TxIn StandardCrypto
type TxOut = TxOut LedgerEra
data TinyWallet m = TinyWallet {
- getUTxO :: STM m (Map TxIn TxOut)
- getSeedInput :: STM m (Maybe TxIn)
- sign :: Tx -> Tx
- coverFee :: UTxO -> Tx -> m (Either ErrCoverFee Tx)
- reset :: m ()
- update :: BlockHeader -> [Tx] -> m ()
}
data WalletInfoOnChain = WalletInfoOnChain {
- walletUTxO :: Map TxIn TxOut
- pparams :: PParams LedgerEra
- systemStart :: SystemStart
- epochInfo :: EpochInfo (Either Text)
- tip :: ChainPoint
}
type ChainQuery m = QueryPoint -> Address ShelleyAddr -> m WalletInfoOnChain
watchUTxOUntil :: (Map TxIn TxOut -> Bool) -> TinyWallet IO -> IO (Map TxIn TxOut)
newTinyWallet :: Tracer IO TinyWalletLog -> NetworkId -> (VerificationKey PaymentKey, SigningKey PaymentKey) -> ChainQuery IO -> IO (EpochInfo (Either Text)) -> IO (TinyWallet IO)
applyTxs :: [Tx] -> (Address -> Bool) -> Map TxIn TxOut -> Map TxIn TxOut
getTxId :: (HashAlgorithm (HASH crypto), HashAnnotated (TxBody (era crypto)) EraIndependentTxBody crypto) => AlonzoTx (era crypto) -> TxId crypto
data ErrCoverFee
- = ErrNotEnoughFunds ChangeError
- | ErrNoFuelUTxOFound
- | ErrUnknownInput {
  - input :: TxIn
  }
- | ErrScriptExecutionFailed {
  - scriptFailure :: (RdmrPtr, TransactionScriptFailure LedgerEra)
  }
- | ErrTranslationError (TranslationError StandardCrypto)
data ChangeError = ChangeError {
- inputBalance :: Coin
- outputBalance :: Coin
}
coverFee_ :: PParams LedgerEra -> SystemStart -> EpochInfo (Either Text) -> Map TxIn TxOut -> Map TxIn TxOut -> AlonzoTx LedgerEra -> Either ErrCoverFee (AlonzoTx LedgerEra)
findLargestUTxO :: Map TxIn TxOut -> Maybe (TxIn, TxOut)
estimateScriptsCost :: PParams LedgerEra -> SystemStart -> EpochInfo (Either Text) -> Map TxIn TxOut -> AlonzoTx LedgerEra -> Either ErrCoverFee (Map RdmrPtr ExUnits)
data TinyWalletLog
- = BeginInitialize
- | EndInitialize {
  - initialUTxO :: UTxO
  - tip :: ChainPoint
  }
- | BeginUpdate {
  - point :: ChainPoint
  }
- | EndUpdate {
  - newUTxO :: UTxO
  }
- | SkipUpdate {
  - point :: ChainPoint
  }

Documentation

type Address = Addr StandardCrypto Source #

type TxIn = TxIn StandardCrypto Source #

type TxOut = TxOut LedgerEra Source #

data TinyWallet m Source #

A TinyWallet is a small abstraction of a wallet with basic UTXO management. The wallet is assumed to have only one address, and only one UTXO at that address. It can sign transactions and keeps track of its UTXO behind the scene.

The wallet is connecting to the node initially and when asked to $sel:reset:TinyWallet. Otherwise it can be fed blocks via $sel:update:TinyWallet as the chain rolls forward.

Constructors

TinyWallet

Fields

getUTxO :: STM m (Map TxIn TxOut)
Return all known UTxO addressed to this wallet.
getSeedInput :: STM m (Maybe TxIn)
Returns the seed input This is the special input needed by Direct chain component to initialise a head
sign :: Tx -> Tx
coverFee :: UTxO -> Tx -> m (Either ErrCoverFee Tx)
reset :: m ()
Re-initializ wallet against the latest tip of the node and start to ignore $sel:update:TinyWallet calls until reaching that tip.
update :: BlockHeader -> [Tx] -> m ()
Update the wallet state given a block and list of txs. May be ignored if wallet is still initializing.

data WalletInfoOnChain Source #

Constructors

WalletInfoOnChain
Fields walletUTxO :: Map TxIn TxOut pparams :: PParams LedgerEra systemStart :: SystemStart epochInfo :: EpochInfo (Either Text) tip :: ChainPoint Latest point on chain the wallet knows of.

type ChainQuery m = QueryPoint -> Address ShelleyAddr -> m WalletInfoOnChain Source #

watchUTxOUntil :: (Map TxIn TxOut -> Bool) -> TinyWallet IO -> IO (Map TxIn TxOut) Source #

newTinyWallet Source #

Arguments

:: Tracer IO TinyWalletLog	A tracer for logging
-> NetworkId	Network identifier to generate our address.
-> (VerificationKey PaymentKey, SigningKey PaymentKey)	Credentials of the wallet.
-> ChainQuery IO	A function to query UTxO, pparams, system start and epoch info from the node. Initially and on demand later.
-> IO (EpochInfo (Either Text))
-> IO (TinyWallet IO)

Create a new tiny wallet handle.

applyTxs :: [Tx] -> (Address -> Bool) -> Map TxIn TxOut -> Map TxIn TxOut Source #

Apply a block to our wallet. Does nothing if the transaction does not modify the UTXO set, or else, remove consumed utxos and add produced ones.

To determine whether a produced output is ours, we apply the given function checking the output's address.

getTxId :: (HashAlgorithm (HASH crypto), HashAnnotated (TxBody (era crypto)) EraIndependentTxBody crypto) => AlonzoTx (era crypto) -> TxId crypto Source #

data ErrCoverFee Source #

This are all the error that can happen during coverFee.

Constructors

ErrNotEnoughFunds ChangeError
ErrNoFuelUTxOFound
ErrUnknownInput
Fields input :: TxIn
ErrScriptExecutionFailed
Fields scriptFailure :: (RdmrPtr, TransactionScriptFailure LedgerEra)
ErrTranslationError (TranslationError StandardCrypto)

Instances

Instances details

Show ErrCoverFee Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods showsPrec :: Int -> ErrCoverFee -> ShowS Source # show :: ErrCoverFee -> String Source # showList :: [ErrCoverFee] -> ShowS Source #

data ChangeError Source #

Constructors

ChangeError
Fields inputBalance :: Coin outputBalance :: Coin

Instances

Instances details

Show ChangeError Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods showsPrec :: Int -> ChangeError -> ShowS Source # show :: ChangeError -> String Source # showList :: [ChangeError] -> ShowS Source #

coverFee_ :: PParams LedgerEra -> SystemStart -> EpochInfo (Either Text) -> Map TxIn TxOut -> Map TxIn TxOut -> AlonzoTx LedgerEra -> Either ErrCoverFee (AlonzoTx LedgerEra) Source #

Cover fee for a transaction body using the given UTXO set. This calculate necessary fees and augments inputs outputs collateral accordingly to cover for the transaction cost and get the change back.

TODO: The fee calculation is currently very dumb and static. XXX: All call sites of this function use cardano-api types

findLargestUTxO :: Map TxIn TxOut -> Maybe (TxIn, TxOut) Source #

estimateScriptsCost Source #

Arguments

:: PParams LedgerEra	Protocol parameters
-> SystemStart	Start of the blockchain, for converting slots to UTC times
-> EpochInfo (Either Text)	Information about epoch sizes, for converting slots to UTC times
-> Map TxIn TxOut	A UTXO needed to resolve inputs
-> AlonzoTx LedgerEra	The pre-constructed transaction
-> Either ErrCoverFee (Map RdmrPtr ExUnits)

Estimate cost of script executions on the transaction. This is only an estimates because the transaction isn't sealed at this point and adding new elements to it like change outputs or script integrity hash may increase that cost a little.

data TinyWalletLog Source #

Constructors

BeginInitialize
EndInitialize
Fields initialUTxO :: UTxO tip :: ChainPoint
BeginUpdate
Fields point :: ChainPoint
EndUpdate
Fields newUTxO :: UTxO
SkipUpdate
Fields point :: ChainPoint

Instances

Instances details

Arbitrary TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods arbitrary :: Gen TinyWalletLog shrink :: TinyWalletLog -> [TinyWalletLog]
FromJSON TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods parseJSON :: Value -> Parser TinyWalletLog parseJSONList :: Value -> Parser [TinyWalletLog]
ToJSON TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods toJSON :: TinyWalletLog -> Value toEncoding :: TinyWalletLog -> Encoding toJSONList :: [TinyWalletLog] -> Value toEncodingList :: [TinyWalletLog] -> Encoding
Generic TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Associated Types type Rep TinyWalletLog :: Type -> Type Source # Methods from :: TinyWalletLog -> Rep TinyWalletLog x Source # to :: Rep TinyWalletLog x -> TinyWalletLog Source #
Show TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods showsPrec :: Int -> TinyWalletLog -> ShowS Source # show :: TinyWalletLog -> String Source # showList :: [TinyWalletLog] -> ShowS Source #
Eq TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet Methods (==) :: TinyWalletLog -> TinyWalletLog -> Bool Source # (/=) :: TinyWalletLog -> TinyWalletLog -> Bool Source #
type Rep TinyWalletLog Source #
Instance details Defined in Hydra.Chain.Direct.Wallet type Rep TinyWalletLog = D1 ('MetaData "TinyWalletLog" "Hydra.Chain.Direct.Wallet" "hydra-node-0.13.0-HKlbaPrFKjs2dhEMwn7ono" 'False) ((C1 ('MetaCons "BeginInitialize" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "EndInitialize" 'PrefixI 'True) (S1 ('MetaSel ('Just "initialUTxO") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 UTxO) :*: S1 ('MetaSel ('Just "tip") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ChainPoint))) :+: (C1 ('MetaCons "BeginUpdate" 'PrefixI 'True) (S1 ('MetaSel ('Just "point") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ChainPoint)) :+: (C1 ('MetaCons "EndUpdate" 'PrefixI 'True) (S1 ('MetaSel ('Just "newUTxO") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 UTxO)) :+: C1 ('MetaCons "SkipUpdate" 'PrefixI 'True) (S1 ('MetaSel ('Just "point") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ChainPoint)))))