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 Go to latest Published: Apr 29, 2021 License: BlueOak-1.0.0 Imports: 25 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func DBVersion added in v0.2.0 

func DBVersion(db *sql.DB) (ver uint32, err error)

DBVersion retrieves the database version from the meta table.

func DisableLog 

func DisableLog()

DisableLog disables all library log output. Logging output is disabled by default until UseLogger is called.

func UseLogger 

func UseLogger(logger slog.Logger)

UseLogger uses a specified Logger to output package logging info.

Types

type Archiver 

type Archiver struct {
	// contains filtered or unexported fields
}

Archiver must implement server/db.DEXArchivist. So far: OrderArchiver, AccountArchiver.

func NewArchiver 

func NewArchiver(ctx context.Context, cfg *Config) (*Archiver, error)

NewArchiver constructs a new Archiver. Use Close when done with the Archiver.

func (*Archiver) Account 

func (a *Archiver) Account(aid account.AccountID) (*account.Account, bool, bool)

Account retrieves the account pubkey, whether the account is paid, and whether the account is open, in that order.

func (*Archiver) AccountInfo 

func (a *Archiver) AccountInfo(aid account.AccountID) (*db.Account, error)

AccountInfo returns data for an account.

func (*Archiver) AccountRegAddr 

func (a *Archiver) AccountRegAddr(aid account.AccountID) (string, error)

AccountRegAddr retrieves the registration fee address created for the the specified account.

func (*Archiver) Accounts 

func (a *Archiver) Accounts() ([]*db.Account, error)

Accounts returns data for all accounts.

func (*Archiver) ActiveOrderCoins 

func (a *Archiver) ActiveOrderCoins(base, quote uint32) (baseCoins, quoteCoins map[order.OrderID][]order.CoinID, err error)

ActiveOrderCoins retrieves a CoinID slice for each active order.

func (*Archiver) ActiveSwaps added in v0.2.0 

func (a *Archiver) ActiveSwaps() ([]*db.SwapDataFull, error)

ActiveSwaps loads the full details for all active swaps across all markets.

func (*Archiver) ActiveUserOrderStatuses 

func (a *Archiver) ActiveUserOrderStatuses(aid account.AccountID) ([]*db.OrderStatus, error)

ActiveUserOrderStatuses retrieves the statuses and filled amounts of all active orders for a user across all markets.

func (*Archiver) AllActiveUserMatches 

func (a *Archiver) AllActiveUserMatches(aid account.AccountID) ([]*db.MatchData, error)

AllActiveUserMatches retrieves a MatchData slice for active matches in all markets involving the given user. Swaps that have successfully completed or failed are not included.

func (*Archiver) BookOrder 

func (a *Archiver) BookOrder(lo *order.LimitOrder) error

BookOrder updates the given LimitOrder with booked status.

func (*Archiver) BookOrders 

func (a *Archiver) BookOrders(base, quote uint32) ([]*order.LimitOrder, error)

BookOrders retrieves all booked orders (with order status booked) for the specified market. This will be used to repopulate a market's book on construction of the market.

func (*Archiver) CancelOrder 

func (a *Archiver) CancelOrder(lo *order.LimitOrder) error

CancelOrder updates a LimitOrder with canceled status. If the order does not exist in the Archiver, CancelOrder returns ErrUnknownOrder. To store a new limit order with canceled status, use StoreOrder.

func (*Archiver) Close 

func (a *Archiver) Close() error

Close closes the underlying DB connection.

func (*Archiver) CloseAccount 

func (a *Archiver) CloseAccount(aid account.AccountID, rule account.Rule) error

CloseAccount closes the account by setting the value of the rule column to the passed rule.

func (*Archiver) CompletedAndAtFaultMatchStats 

func (a *Archiver) CompletedAndAtFaultMatchStats(aid account.AccountID, lastN int) ([]*db.MatchOutcome, error)

CompletedAndAtFaultMatchStats retrieves the outcomes of matches that were (1) successfully completed by the specified user, or (2) failed with the user being the at-fault party. Note that the MakerRedeemed match status may be either a success or failure depending on if the user was the maker or taker in the swap, respectively, and the MatchOutcome.Fail flag disambiguates this.

func (*Archiver) CompletedUserOrders 

func (a *Archiver) CompletedUserOrders(aid account.AccountID, N int) (oids []order.OrderID, compTimes []int64, err error)

CompletedUserOrders retrieves the N most recently completed orders for a user across all markets.

func (*Archiver) CreateAccount 

func (a *Archiver) CreateAccount(acct *account.Account) (string, error)

CreateAccount creates an entry for a new account in the accounts table. A DCR registration fee address is created and returned.

func (*Archiver) CreateKeyEntry 

func (a *Archiver) CreateKeyEntry(keyHash []byte) error

CreateKeyEntry creates an entry for the pubkey (hash) if one doesn't already exist.

func (*Archiver) EpochOrders added in v0.2.0 

func (a *Archiver) EpochOrders(base, quote uint32) ([]order.Order, error)

EpochOrders retrieves all epoch orders for the specified market returns them as a slice of order.Order.

func (*Archiver) ExecuteOrder 

func (a *Archiver) ExecuteOrder(ord order.Order) error

ExecuteOrder updates the given Order with executed status.

func (*Archiver) ExecutedCancelsForUser 

func (a *Archiver) ExecutedCancelsForUser(aid account.AccountID, N int) (oids, targets []order.OrderID, execTimes []int64, err error)

ExecutedCancelsForUser retrieves up to N executed cancel orders for a given user. These may be user-initiated cancels, or cancels created by the server (revokes). Executed cancel orders from all markets are returned.

func (*Archiver) FailCancelOrder 

func (a *Archiver) FailCancelOrder(co *order.CancelOrder) error

FailCancelOrder updates or inserts the given CancelOrder with failed status. To update a CancelOrder with executed status, use ExecuteOrder.

func (*Archiver) Fatal 

func (a *Archiver) Fatal() <-chan struct{}

Fatal returns a nil or closed channel for select use. Use LastErr to get the latest fatal error.

func (*Archiver) FlushBook 

func (a *Archiver) FlushBook(base, quote uint32) (sellsRemoved, buysRemoved []order.OrderID, err error)

FlushBook revokes all booked orders for a market.

func (*Archiver) ForgiveMatchFail 

func (a *Archiver) ForgiveMatchFail(mid order.MatchID) (bool, error)

ForgiveMatchFail marks the specified match as forgiven. Since this is an administrative function, the burden is on the operator to ensure the match can actually be forgiven (inactive, not already forgiven, and not in MatchComplete status).

func (*Archiver) InsertEpoch 

func (a *Archiver) InsertEpoch(ed *db.EpochResults) error

InsertEpoch stores the results of a newly-processed epoch. TODO: test.

func (*Archiver) InsertMatch 

func (a *Archiver) InsertMatch(match *order.Match) error

InsertMatch updates an existing match.

func (*Archiver) LastErr 

func (a *Archiver) LastErr() error

LastErr returns any fatal or unexpected error encountered in a recent query. This may be used to check if the database had an unrecoverable error (disconnect, etc.).

func (*Archiver) LoadEpochStats added in v0.2.0 

func (a *Archiver) LoadEpochStats(base, quote uint32, caches []*db.CandleCache) error

LoadEpochStats reads all market epoch history from the database, updating the provided caches along the way.

func (*Archiver) MarketMatches added in v0.2.0 

func (a *Archiver) MarketMatches(base, quote uint32) ([]*db.MatchDataWithCoins, error)

MarketMatches retrieves all active matches for a market.

func (*Archiver) MarketMatchesStreaming added in v0.2.0 

func (a *Archiver) MarketMatchesStreaming(base, quote uint32, includeInactive bool, N int64, f func(*db.MatchDataWithCoins) error) (int, error)

MarketMatchesStreaming streams all active matches for a market into the provided function. If includeInactive, all matches are streamed. A limit may be specified, where <=0 means unlimited.

func (*Archiver) MatchByID 

func (a *Archiver) MatchByID(mid order.MatchID, base, quote uint32) (*db.MatchData, error)

MatchByID retrieves the match for the given MatchID.

func (*Archiver) MatchStatuses 

func (a *Archiver) MatchStatuses(aid account.AccountID, base, quote uint32, matchIDs []order.MatchID) ([]*db.MatchStatus, error)

MatchStatuses retrieves a *db.MatchStatus for every match in matchIDs for which there is data, and for which the user is at least one of the parties. It is not an error if a match ID in matchIDs does not match, i.e. the returned slice need not be the same length as matchIDs.

func (*Archiver) NewEpochOrder 

func (a *Archiver) NewEpochOrder(ord order.Order, epochIdx, epochDur int64) error

NewEpochOrder stores the given order with epoch status. This is equivalent to StoreOrder with OrderStatusEpoch.

func (*Archiver) Order 

func (a *Archiver) Order(oid order.OrderID, base, quote uint32) (order.Order, order.OrderStatus, error)

Order retrieves an order with the given OrderID, stored for the market specified by the given base and quote assets. A non-nil error will be returned if the market is not recognized. If the order is not found, the error value is ErrUnknownOrder, and the type is order.OrderStatusUnknown. The only recognized order types are market, limit, and cancel.

func (*Archiver) OrderPreimage 

func (a *Archiver) OrderPreimage(ord order.Order) (order.Preimage, error)

func (*Archiver) OrderStatus 

func (a *Archiver) OrderStatus(ord order.Order) (order.OrderStatus, order.OrderType, int64, error)

OrderStatus gets the status, ID, and filled amount of the given order. See also OrderStatusByID.

func (*Archiver) OrderStatusByID 

func (a *Archiver) OrderStatusByID(oid order.OrderID, base, quote uint32) (order.OrderStatus, order.OrderType, int64, error)

OrderStatusByID gets the status, type, and filled amount of the order with the given OrderID in the market specified by a base and quote asset. See also OrderStatus. If the order is not found, the error value is ErrUnknownOrder, and the type is order.OrderStatusUnknown.

func (*Archiver) OrderWithCommit 

func (a *Archiver) OrderWithCommit(ctx context.Context, commit order.Commitment) (found bool, oid order.OrderID, err error)

OrderWithCommit searches all markets' trade and cancel orders, both active and archived, for an order with the given Commitment.

func (*Archiver) PayAccount 

func (a *Archiver) PayAccount(aid account.AccountID, coinID []byte) error

PayAccount sets the registration fee payment details for the account, effectively completing the registration process.

func (*Archiver) PreimageStats 

func (a *Archiver) PreimageStats(user account.AccountID, lastN int) ([]*db.PreimageResult, error)

PreimageStats retrieves results of the N most recent preimage requests for the user across all markets.

func (*Archiver) RestoreAccount 

func (a *Archiver) RestoreAccount(aid account.AccountID) error

RestoreAccount reopens the account by setting the value of the rule column to account.NoRule.

func (*Archiver) RevokeOrder 

func (a *Archiver) RevokeOrder(ord order.Order) (cancelID order.OrderID, timeStamp time.Time, err error)

RevokeOrder updates an Order with revoked status, which is used for DEX-revoked orders rather than orders matched with a user's CancelOrder. If the order does not exist in the Archiver, RevokeOrder returns ErrUnknownOrder. This may change orders with status executed to revoked, which may be unexpected.

func (*Archiver) RevokeOrderUncounted 

func (a *Archiver) RevokeOrderUncounted(ord order.Order) (cancelID order.OrderID, timeStamp time.Time, err error)

RevokeOrderUncounted is like RevokeOrder except that the generated cancel order will not be counted against the user. i.e. ExecutedCancelsForUser should not return the cancel orders created this way.

func (*Archiver) SaveAuditAckSigA 

func (a *Archiver) SaveAuditAckSigA(mid db.MarketMatchID, sig []byte) error

SaveAuditAckSigA records party A's signature acknowledging their audit of B's swap contract.

func (*Archiver) SaveAuditAckSigB 

func (a *Archiver) SaveAuditAckSigB(mid db.MarketMatchID, sig []byte) error

SaveAuditAckSigB records party B's signature acknowledging their audit of A's swap contract.

func (*Archiver) SaveContractA 

func (a *Archiver) SaveContractA(mid db.MarketMatchID, contract []byte, coinID []byte, timestamp int64) error

SaveContractA records party A's swap contract script and the coinID (e.g. transaction output) containing the contract on chain X. Note that this contract contains the secret hash.

func (*Archiver) SaveContractB 

func (a *Archiver) SaveContractB(mid db.MarketMatchID, contract []byte, coinID []byte, timestamp int64) error

SaveContractB records party B's swap contract script and the coinID (e.g. transaction output) containing the contract on chain Y.

func (*Archiver) SaveMatchAckSigA 

func (a *Archiver) SaveMatchAckSigA(mid db.MarketMatchID, sig []byte) error

SaveMatchAckSigA records the match data acknowledgement signature from swap party A (the initiator), which is the maker in the DEX.

func (*Archiver) SaveMatchAckSigB 

func (a *Archiver) SaveMatchAckSigB(mid db.MarketMatchID, sig []byte) error

SaveMatchAckSigB records the match data acknowledgement signature from swap party B (the participant), which is the taker in the DEX.

func (*Archiver) SaveRedeemA 

func (a *Archiver) SaveRedeemA(mid db.MarketMatchID, coinID, secret []byte, timestamp int64) error

SaveRedeemA records party A's redemption coinID (e.g. transaction output), which spends party B's swap contract on chain Y, and the secret revealed by the signature script of the input spending the contract. Note that this transaction will contain the secret, which party B extracts.

func (*Archiver) SaveRedeemAckSigB 

func (a *Archiver) SaveRedeemAckSigB(mid db.MarketMatchID, sig []byte) error

SaveRedeemAckSigB records party B's signature acknowledging party A's redemption, which spent their swap contract on chain Y and revealed the secret. Since this may be the final step in match negotiation, the match is also flagged as inactive (not the same as archival or even status of MatchComplete, which is set by SaveRedeemB) if the initiators's redeem ack signature is already set.

func (*Archiver) SaveRedeemB 

func (a *Archiver) SaveRedeemB(mid db.MarketMatchID, coinID []byte, timestamp int64) error

SaveRedeemB records party B's redemption coinID (e.g. transaction output), which spends party A's swap contract on chain X.

func (*Archiver) SetMatchInactive 

func (a *Archiver) SetMatchInactive(mid db.MarketMatchID) error

SetMatchInactive flags the match as done/inactive. This is not necessary if SaveRedeemAckSigB is run for the match since it will flag the match as done.

func (*Archiver) SetOrderCompleteTime 

func (a *Archiver) SetOrderCompleteTime(ord order.Order, compTimeMs int64) error

SetOrderCompleteTime sets the swap completion time for an existing order.

func (*Archiver) StoreOrder 

func (a *Archiver) StoreOrder(ord order.Order, epochIdx, epochDur int64, status order.OrderStatus) error

StoreOrder stores an order for the specified epoch ID (idx:dur) with the provided status. The market is determined from the Order. A non-nil error will be returned if the market is not recognized. All orders are validated via server/db.ValidateOrder to ensure only sensible orders reach persistent storage. Updating orders should be done via one of the update functions such as UpdateOrderStatus.

func (*Archiver) StorePreimage 

func (a *Archiver) StorePreimage(ord order.Order, pi order.Preimage) error

StorePreimage stores the preimage associated with an existing order.

func (*Archiver) SwapData 

func (a *Archiver) SwapData(mid db.MarketMatchID) (order.MatchStatus, *db.SwapData, error)

SwapData retrieves the match status and all the SwapData for a match.

func (*Archiver) UpdateOrderFilled 

func (a *Archiver) UpdateOrderFilled(ord *order.LimitOrder) error

UpdateOrderFilled updates the filled amount of the given order. Both the market and new filled amount are determined from the Order. OrderStatusByID is used to locate the existing order. This function applies only to limit orders, not market or cancel orders. Market orders may only be updated by ExecuteOrder since their filled amount only changes when their status changes. See also UpdateOrderFilledByID.

func (*Archiver) UpdateOrderFilledByID 

func (a *Archiver) UpdateOrderFilledByID(oid order.OrderID, base, quote uint32, filled int64) error

UpdateOrderFilledByID updates the filled amount of the order with the given OrderID in the market specified by a base and quote asset. This function applies only to market and limit orders, not cancel orders. OrderStatusByID is used to locate the existing order. If the order is not found, the error value is ErrUnknownOrder, and the type is order.OrderStatusUnknown. See also UpdateOrderFilled. To also update the order status, use UpdateOrderStatusByID or UpdateOrderStatus.

func (*Archiver) UpdateOrderStatus 

func (a *Archiver) UpdateOrderStatus(ord order.Order, status order.OrderStatus) error

UpdateOrderStatus updates the status and filled amount of the given order. Both the market and new filled amount are determined from the Order. OrderStatusByID is used to locate the existing order. See also UpdateOrderStatusByID.

func (*Archiver) UpdateOrderStatusByID 

func (a *Archiver) UpdateOrderStatusByID(oid order.OrderID, base, quote uint32, status order.OrderStatus, filled int64) error

UpdateOrderStatusByID updates the status and filled amount of the order with the given OrderID in the market specified by a base and quote asset. If filled is -1, the filled amount is unchanged. For cancel orders, the filled amount is ignored. OrderStatusByID is used to locate the existing order. If the order is not found, the error value is ErrUnknownOrder, and the type is market/order.OrderStatusUnknown. See also UpdateOrderStatus.

func (*Archiver) UserMatches 

func (a *Archiver) UserMatches(aid account.AccountID, base, quote uint32) ([]*db.MatchData, error)

UserMatches retrieves all matches involving a user on the given market. TODO: consider a time limited version of this to retrieve recent matches.

func (*Archiver) UserOrderStatuses 

func (a *Archiver) UserOrderStatuses(aid account.AccountID, base, quote uint32, oids []order.OrderID) ([]*db.OrderStatus, error)

UserOrderStatuses retrieves the statuses and filled amounts of the orders with the provided order IDs for the given account in the market specified by a base and quote asset. The number and ordering of the returned statuses is not necessarily the same as the number and ordering of the provided order IDs. It is not an error if any or all of the provided order IDs cannot be found for the given account in the specified market.

func (*Archiver) UserOrders 

func (a *Archiver) UserOrders(ctx context.Context, aid account.AccountID, base, quote uint32) ([]order.Order, []order.OrderStatus, error)

UserOrders retrieves all orders for the given account in the market specified by a base and quote asset.

type Config 

type Config struct {
	Host, Port, User, Pass, DBName string
	ShowPGConfig                   bool
	QueryTimeout                   time.Duration

	// MarketCfg specifies all of the markets that the Archiver should prepare.
	MarketCfg []*dex.MarketInfo

	// Net is the current network, and can be one of mainnet, testnet, or simnet.
	Net dex.Network

	// FeeKey is base58-encoded extended public key that will be used for
	// generating fee payment addresses.
	FeeKey string
}

Config holds the Archiver's configuration.

type DetailedError 

type DetailedError struct {
	// contains filtered or unexported fields
}

DetailedError pairs an Error with details.

func NewDetailedError 

func NewDetailedError(err error, detail string) DetailedError

NewDetailedError wraps the provided Error with details in a DetailedError, facilitating the use of errors.Is and errors.As via errors.Unwrap.

func (DetailedError) Error 

func (e DetailedError) Error() string

Error satisfies the error interface, combining the wrapped error message with the details.

func (DetailedError) Unwrap 

func (e DetailedError) Unwrap() error

Unwrap returns the wrapped error, allowing errors.Is and errors.As to work.

type Driver 

type Driver struct{}

Driver implements db.Driver.

func (*Driver) Open 

func (d *Driver) Open(ctx context.Context, cfg interface{}) (db.DEXArchivist, error)

Open creates the DB backend, returning a DEXArchivist.

func (*Driver) UseLogger 

func (*Driver) UseLogger(logger dex.Logger)

UseLogger sets the package-wide logger for the registered DB Driver.

type PGSetting 

type PGSetting struct {
	Name, Setting, Unit, ShortDesc, Source, SourceFile, SourceLine string
}

PGSetting describes a PostgreSQL setting scanned from pg_settings.

type PGSettings 

type PGSettings map[string]PGSetting

PGSettings facilitates looking up a PGSetting based on a setting's Name.

func (PGSettings) String 

func (pgs PGSettings) String() string

String implements the Stringer interface, generating a table of the settings where the Setting and Unit fields are merged into a single column. The rows of the table are sorted by the PGSettings string key (the setting's Name). This function is not thread-safe, so do not modify PGSettings concurrently.

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