btc

package
v0.5.6 Latest Latest
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 Go to latest Published: Nov 15, 2022 License: BlueOak-1.0.0 Imports: 52 Imported by: 8

Documentation

Index

Constants

View Source 
const (
	WalletTransactionNotFound = dex.ErrorKind("wallet transaction not found")
	SpentStatusUnknown        = dex.ErrorKind("spend status not known")
)
View Source 
const (

	// BipID is the BIP-0044 asset ID.
	BipID = 0
)

Variables

View Source 
var (
	// ContractSearchLimit is how far back in time AuditContract in SPV mode
	// will search for a contract if no txData is provided. This should be a
	// positive duration.
	ContractSearchLimit = 48 * time.Hour

	// WalletInfo defines some general information about a Bitcoin wallet.
	WalletInfo = &asset.WalletInfo{
		Name:     "Bitcoin",
		Version:  version,
		UnitInfo: dexbtc.UnitInfo,
		AvailableWallets: []*asset.WalletDefinition{
			spvWalletDefinition,
			rpcWalletDefinition,
			electrumWalletDefinition,
		},
		LegacyWalletIndex: 1,
	}
)

Functions

func NewWallet 

func NewWallet(cfg *asset.WalletConfig, logger dex.Logger, net dex.Network) (asset.Wallet, error)

NewWallet is the exported constructor by which the DEX will import the exchange wallet.

Types

type BTCCloneCFG 

type BTCCloneCFG struct {
	WalletCFG         *asset.WalletConfig
	MinNetworkVersion uint64
	WalletInfo        *asset.WalletInfo
	Symbol            string
	Logger            dex.Logger
	Network           dex.Network
	ChainParams       *chaincfg.Params
	// Ports is the default wallet RPC tcp ports used when undefined in
	// WalletConfig.
	Ports               dexbtc.NetPorts
	DefaultFallbackFee  uint64 // sats/byte
	DefaultFeeRateLimit uint64 // sats/byte
	// LegacyBalance is for clones that don't yet support the 'getbalances' RPC
	// call.
	LegacyBalance bool
	// ZECStyleBalance is for clones that don't support getbalances or
	// walletinfo, and don't take an account name argument.
	ZECStyleBalance bool
	// If segwit is false, legacy addresses and contracts will be used. This
	// setting must match the configuration of the server's asset backend.
	Segwit bool
	// LegacyRawFeeLimit can be true if the RPC only supports the boolean
	// allowHighFees argument to the sendrawtransaction RPC.
	LegacyRawFeeLimit bool
	// AddressDecoder is an optional argument that can decode an address string
	// into btcutil.Address. If AddressDecoder is not supplied,
	// btcutil.DecodeAddress will be used.
	AddressDecoder dexbtc.AddressDecoder // string => btcutil.Address
	// AddressStringer is an optional argument that can encode a btcutil.Address
	// into an address string. If AddressStringer is not supplied, the
	// (btcutil.Address).String method will be used.
	AddressStringer dexbtc.AddressStringer // btcutil.Address => string, may be an override or just the String method
	// BlockDeserializer can be used in place of (*wire.MsgBlock).Deserialize.
	BlockDeserializer func([]byte) (*wire.MsgBlock, error)
	// ArglessChangeAddrRPC can be true if the getrawchangeaddress takes no
	// address-type argument.
	ArglessChangeAddrRPC bool
	// NonSegwitSigner can be true if the transaction signature hash data is not
	// the standard for non-segwit Bitcoin. If nil, txscript.
	NonSegwitSigner TxInSigner
	// FeeEstimator provides a way to get fees given an RawRequest-enabled
	// client and a confirmation target.
	FeeEstimator func(RawRequester, uint64) (uint64, error)
	// OmitAddressType causes the address type (bech32, legacy) to be omitted
	// from calls to getnewaddress.
	OmitAddressType bool
	// LegacySignTxRPC causes the RPC client to use the signrawtransaction
	// endpoint instead of the signrawtransactionwithwallet endpoint.
	LegacySignTxRPC bool
	// BooleanGetBlockRPC causes the RPC client to use a boolean second argument
	// for the getblock endpoint, instead of Bitcoin's numeric.
	BooleanGetBlockRPC bool
	// NumericGetRawRPC uses a numeric boolean indicator for the
	// getrawtransaction RPC.
	NumericGetRawRPC bool
	// LegacyValidateAddressRPC uses the validateaddress endpoint instead of
	// getwalletinfo in order to discover ownership of an address.
	LegacyValidateAddressRPC bool
	// SingularWallet signals that the node software supports only one wallet,
	// so the RPC endpoint does not have a /wallet/{walletname} path.
	SingularWallet bool
	// UnlockSpends manually unlocks outputs as they are spent. Most asses will
	// unlock wallet outputs automatically as they are spent.
	UnlockSpends bool
	// ConstantDustLimit is used if an asset enforces a dust limit (minimum
	// output value) that doesn't depend on the serialized size of the output.
	// If ConstantDustLimit is zero, dexbtc.IsDust is used.
	ConstantDustLimit uint64
	// TxDeserializer is an optional function used to deserialize a transaction.
	TxDeserializer func([]byte) (*wire.MsgTx, error)
	// TxSerializer is an optional function used to serialize a transaction.
	TxSerializer func(*wire.MsgTx) ([]byte, error)
	// TxHasher is a function that generates a tx hash from a MsgTx.
	TxHasher func(*wire.MsgTx) *chainhash.Hash
	// TxSizeCalculator is an optional function that will be used to calculate
	// the size of a transaction.
	TxSizeCalculator func(*wire.MsgTx) uint64
	// TxVersion is an optional function that returns a version to use for
	// new transactions.
	TxVersion func() int32
	// ManualMedianTime causes the median time to be calculated manually.
	ManualMedianTime bool
}

BTCCloneCFG holds clone specific parameters.

type Balances added in v0.4.0 

type Balances struct {
	Trusted   float64  `json:"trusted"`
	Untrusted float64  `json:"untrusted_pending"`
	Immature  float64  `json:"immature"`
	Used      *float64 `json:"used,omitempty"`
}

Balances is a categorical balance breakdown.

type Driver 

type Driver struct{}

Driver implements asset.Driver.

func (*Driver) Create added in v0.4.0 

func (d *Driver) Create(params *asset.CreateWalletParams) error

Create creates a new SPV wallet.

func (*Driver) DecodeCoinID 

func (d *Driver) DecodeCoinID(coinID []byte) (string, error)

DecodeCoinID creates a human-readable representation of a coin ID for Bitcoin.

func (*Driver) Exists added in v0.4.0 

func (d *Driver) Exists(walletType, dataDir string, settings map[string]string, net dex.Network) (bool, error)

Exists checks the existence of the wallet. Part of the Creator interface, so only used for wallets with WalletDefinition.Seeded = true.

func (*Driver) Info 

func (d *Driver) Info() *asset.WalletInfo

Info returns basic information about the wallet and asset.

func (*Driver) Open added in v0.4.0 

func (d *Driver) Open(cfg *asset.WalletConfig, logger dex.Logger, network dex.Network) (asset.Wallet, error)

Open opens or connects to the BTC exchange wallet. Start the wallet with its Run method.

type ExchangeWalletAccelerator added in v0.5.0 

type ExchangeWalletAccelerator struct {
	*ExchangeWalletFullNode
}

ExchangeWalletAccelerator implements the Accelerator interface on an ExchangeWalletFullNode.

func (*ExchangeWalletAccelerator) AccelerateOrder added in v0.5.0 

func (btc *ExchangeWalletAccelerator) AccelerateOrder(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, newFeeRate uint64) (asset.Coin, string, error)

AccelerateOrder uses the Child-Pays-For-Parent technique to accelerate a chain of swap transactions and previous accelerations. It broadcasts a new transaction with a fee high enough so that the average fee of all the unconfirmed transactions in the chain and the new transaction will have an average fee rate of newFeeRate. The changeCoin argument is the latest change in the order. It must be the input in the acceleration transaction in order for the order to be accelerated. requiredForRemainingSwaps is the amount of funds required to complete the rest of the swaps in the order. The change output of the acceleration transaction will have at least this amount.

The returned change coin may be nil, and should be checked before use.

func (*ExchangeWalletAccelerator) AccelerationEstimate added in v0.5.0 

func (btc *ExchangeWalletAccelerator) AccelerationEstimate(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, newFeeRate uint64) (uint64, error)

AccelerationEstimate takes the same parameters as AccelerateOrder, but instead of broadcasting the acceleration transaction, it just returns the amount of funds that will need to be spent in order to increase the average fee rate to the desired amount.

func (ExchangeWalletAccelerator) Connect added in v0.5.0 

func (btc ExchangeWalletAccelerator) Connect(ctx context.Context) (*sync.WaitGroup, error)

Connect connects the wallet to the btc.Wallet backend and starts monitoring blocks and peers. Satisfies the dex.Connector interface.

func (ExchangeWalletAccelerator) FindRedemption added in v0.5.0 

func (btc ExchangeWalletAccelerator) FindRedemption(ctx context.Context, coinID, _ dex.Bytes) (redemptionCoin, secret dex.Bytes, err error)

FindRedemption watches for the input that spends the specified contract coin, and returns the spending input and the contract's secret key when it finds a spender.

This method blocks until the redemption is found, an error occurs or the provided context is canceled.

func (*ExchangeWalletAccelerator) PreAccelerate added in v0.5.0 

func (btc *ExchangeWalletAccelerator) PreAccelerate(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, feeSuggestion uint64) (uint64, *asset.XYRange, *asset.EarlyAcceleration, error)

PreAccelerate returns the current average fee rate of the unmined swap initiation and acceleration transactions, and also returns a suggested range that the fee rate should be increased to in order to expedite mining. The feeSuggestion argument is the current prevailing network rate. It is used to help determine the suggestedRange, which is a range meant to give the user a good amount of flexibility in determining the post acceleration effective fee rate, but still not allowing them to pick something outrageously high.

type ExchangeWalletElectrum added in v0.5.0 

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

ExchangeWalletElectrum is the asset.Wallet for an external Electrum wallet.

func ElectrumWallet added in v0.5.0 

func ElectrumWallet(cfg *BTCCloneCFG) (*ExchangeWalletElectrum, error)

ElectrumWallet creates a new ExchangeWalletElectrum for the provided configuration, which must contain the necessary details for accessing the Electrum wallet's RPC server in the WalletCFG.Settings map.

func (ExchangeWalletElectrum) AuditContract added in v0.5.0 

func (btc ExchangeWalletElectrum) AuditContract(coinID, contract, txData dex.Bytes, rebroadcast bool) (*asset.AuditInfo, error)

AuditContract retrieves information about a swap contract from the provided txData. The extracted information would be used to audit the counter-party's contract during a swap. The txData may be empty to attempt retrieval of the transaction output from the network, but it is only ensured to succeed for a full node or, if the tx is confirmed, an SPV wallet. Normally the server should communicate this txData, and the caller can decide to require it. The ability to work with an empty txData is a convenience for recovery tools and testing, and it may change in the future if a GetTxData method is added for this purpose.

func (ExchangeWalletElectrum) Balance added in v0.5.0 

func (btc ExchangeWalletElectrum) Balance() (*asset.Balance, error)

Balance returns the total available funds in the wallet. Part of the asset.Wallet interface.

func (*ExchangeWalletElectrum) Connect added in v0.5.0 

func (btc *ExchangeWalletElectrum) Connect(ctx context.Context) (*sync.WaitGroup, error)

Connect connects to the Electrum wallet's RPC server and an electrum server directly. Goroutines are started to monitor for new blocks and server connection changes. Satisfies the dex.Connector interface.

func (*ExchangeWalletElectrum) DepositAddress added in v0.5.0 

func (btc *ExchangeWalletElectrum) DepositAddress() (string, error)

DepositAddress returns an address for depositing funds into the exchange wallet. The address will be unused but not necessarily new. Use NewAddress to request a new address, but it should be used immediately.

func (ExchangeWalletElectrum) EstimateRegistrationTxFee added in v0.5.0 

func (btc ExchangeWalletElectrum) EstimateRegistrationTxFee(feeRate uint64) uint64

EstimateRegistrationTxFee returns an estimate for the tx fee needed to pay the registration fee using the provided feeRate.

func (*ExchangeWalletElectrum) FeeRate added in v0.5.0 

func (btc *ExchangeWalletElectrum) FeeRate() uint64

FeeRate gets a fee rate estimate. Satisfies asset.FeeRater.

func (*ExchangeWalletElectrum) FindRedemption added in v0.5.0 

func (btc *ExchangeWalletElectrum) FindRedemption(ctx context.Context, coinID, contract dex.Bytes) (redemptionCoin, secret dex.Bytes, err error)

FindRedemption locates a swap contract output's redemption transaction input and the secret key used to spend the output.

func (ExchangeWalletElectrum) FundOrder added in v0.5.0 

func (btc ExchangeWalletElectrum) FundOrder(ord *asset.Order) (asset.Coins, []dex.Bytes, error)

FundOrder selects coins for use in an order. The coins will be locked, and will not be returned in subsequent calls to FundOrder or calculated in calls to Available, unless they are unlocked with ReturnCoins. The returned []dex.Bytes contains the redeem scripts for the selected coins. Equal number of coins and redeemed scripts must be returned. A nil or empty dex.Bytes should be appended to the redeem scripts collection for coins with no redeem script.

func (ExchangeWalletElectrum) FundingCoins added in v0.5.0 

func (btc ExchangeWalletElectrum) FundingCoins(ids []dex.Bytes) (asset.Coins, error)

FundingCoins gets funding coins for the coin IDs. The coins are locked. This method might be called to reinitialize an order from data stored externally. This method will only return funding coins, e.g. unspent transaction outputs.

func (ExchangeWalletElectrum) GetBestBlockHeight added in v0.5.0 

func (btc ExchangeWalletElectrum) GetBestBlockHeight() (int32, error)

GetBestBlockHeight is exported for use by clone wallets. Not part of the asset.Wallet interface.

func (ExchangeWalletElectrum) Info added in v0.5.0 

func (btc ExchangeWalletElectrum) Info() *asset.WalletInfo

Info returns basic information about the wallet and asset.

func (ExchangeWalletElectrum) IsDust added in v0.5.0 

func (btc ExchangeWalletElectrum) IsDust(txOut *wire.TxOut, minRelayTxFee uint64) bool

IsDust checks if the tx output's value is dust. If the dustLimit is set, it is compared against that, otherwise the formula in dexbtc.IsDust is used.

func (ExchangeWalletElectrum) Lock added in v0.5.0 

func (btc ExchangeWalletElectrum) Lock() error

Lock locks the ExchangeWallet and the underlying bitcoind wallet.

func (ExchangeWalletElectrum) Locked added in v0.5.0 

func (btc ExchangeWalletElectrum) Locked() bool

Locked will be true if the wallet is currently locked.

func (ExchangeWalletElectrum) LocktimeExpired added in v0.5.0 

func (btc ExchangeWalletElectrum) LocktimeExpired(_ context.Context, contract dex.Bytes) (bool, time.Time, error)

LocktimeExpired returns true if the specified contract's locktime has expired, making it possible to issue a Refund.

func (ExchangeWalletElectrum) MaxOrder added in v0.5.0 

func (btc ExchangeWalletElectrum) MaxOrder(ord *asset.MaxOrderForm) (*asset.SwapEstimate, error)

MaxOrder generates information about the maximum order size and associated fees that the wallet can support for the given DEX configuration. The fees are an estimate based on current network conditions, and will be <= the fees associated with nfo.MaxFeeRate. For quote assets, the caller will have to calculate lotSize based on a rate conversion from the base asset's lot size. lotSize must not be zero and will cause a panic if so.

func (ExchangeWalletElectrum) NewAddress added in v0.5.0 

func (btc ExchangeWalletElectrum) NewAddress() (string, error)

NewAddress returns a new address from the wallet. This satisfies the NewAddresser interface.

func (ExchangeWalletElectrum) OwnsDepositAddress added in v0.5.0 

func (btc ExchangeWalletElectrum) OwnsDepositAddress(address string) (bool, error)

OwnsDepositAddress indicates if the provided address can be used to deposit funds into the wallet.

func (ExchangeWalletElectrum) PreRedeem added in v0.5.0 

func (btc ExchangeWalletElectrum) PreRedeem(req *asset.PreRedeemForm) (*asset.PreRedeem, error)

PreRedeem generates an estimate of the range of redemption fees that could be assessed.

func (ExchangeWalletElectrum) PreSwap added in v0.5.0 

func (btc ExchangeWalletElectrum) PreSwap(req *asset.PreSwapForm) (*asset.PreSwap, error)

PreSwap get order estimates and order options based on the available funds and user-selected options.

func (ExchangeWalletElectrum) Reconfigure added in v0.5.0 

func (btc ExchangeWalletElectrum) Reconfigure(ctx context.Context, cfg *asset.WalletConfig, currentAddress string) (restart bool, err error)

Reconfigure attempts to reconfigure the wallet.

func (ExchangeWalletElectrum) Redeem added in v0.5.0 

func (btc ExchangeWalletElectrum) Redeem(form *asset.RedeemForm) ([]dex.Bytes, asset.Coin, uint64, error)

Redeem sends the redemption transaction, completing the atomic swap.

func (*ExchangeWalletElectrum) RedemptionAddress added in v0.5.0 

func (btc *ExchangeWalletElectrum) RedemptionAddress() (string, error)

RedemptionAddress gets an address for use in redeeming the counterparty's swap. This would be included in their swap initialization. The address will be unused but not necessarily new because these addresses often go unused.

func (ExchangeWalletElectrum) Refund added in v0.5.0 

func (btc ExchangeWalletElectrum) Refund(coinID, contract dex.Bytes, feeRate uint64) (dex.Bytes, error)

Refund revokes a contract. This can only be used after the time lock has expired. This MUST return an asset.CoinNotFoundError error if the coin is spent. NOTE: The contract cannot be retrieved from the unspent coin info as the wallet does not store it, even though it was known when the init transaction was created. The client should store this information for persistence across sessions.

func (ExchangeWalletElectrum) RegFeeConfirmations added in v0.5.0 

func (btc ExchangeWalletElectrum) RegFeeConfirmations(_ context.Context, id dex.Bytes) (confs uint32, err error)

RegFeeConfirmations gets the number of confirmations for the specified output by first checking for a unspent output, and if not found, searching indexed wallet transactions.

func (ExchangeWalletElectrum) ReturnCoins added in v0.5.0 

func (btc ExchangeWalletElectrum) ReturnCoins(unspents asset.Coins) error

ReturnCoins unlocks coins. This would be used in the case of a canceled or partially filled order. Part of the asset.Wallet interface.

func (ExchangeWalletElectrum) Send added in v0.5.0 

func (btc ExchangeWalletElectrum) Send(address string, value, feeRate uint64) (asset.Coin, error)

Send sends the exact value to the specified address. This is different from Withdraw, which subtracts the tx fees from the amount sent. feeRate is in units of sats/byte.

func (ExchangeWalletElectrum) SignMessage added in v0.5.0 

func (btc ExchangeWalletElectrum) SignMessage(coin asset.Coin, msg dex.Bytes) (pubkeys, sigs []dex.Bytes, err error)

SignMessage signs the message with the private key associated with the specified unspent coin. A slice of pubkeys required to spend the coin and a signature for each pubkey are returned.

func (ExchangeWalletElectrum) Swap added in v0.5.0 

func (btc ExchangeWalletElectrum) Swap(swaps *asset.Swaps) ([]asset.Receipt, asset.Coin, uint64, error)

Swap sends the swaps in a single transaction and prepares the receipts. The Receipts returned can be used to refund a failed transaction. The Input coins are NOT manually unlocked because they're auto-unlocked when the transaction is broadcasted.

func (ExchangeWalletElectrum) SwapConfirmations added in v0.5.0 

func (btc ExchangeWalletElectrum) SwapConfirmations(_ context.Context, id dex.Bytes, contract dex.Bytes, startTime time.Time) (uint32, bool, error)

SwapConfirmations gets the number of confirmations for the specified swap by first checking for a unspent output, and if not found, searching indexed wallet transactions.

func (*ExchangeWalletElectrum) Sweep added in v0.5.0 

func (btc *ExchangeWalletElectrum) Sweep(address string, feeSuggestion uint64) (asset.Coin, error)

Sweep sends all the funds in the wallet to an address.

func (ExchangeWalletElectrum) SyncStatus added in v0.5.0 

func (btc ExchangeWalletElectrum) SyncStatus() (bool, float32, error)

SyncStatus is information about the blockchain sync status.

func (ExchangeWalletElectrum) Unlock added in v0.5.0 

func (btc ExchangeWalletElectrum) Unlock(pw []byte) error

Unlock unlocks the ExchangeWallet. The pw supplied should be the same as the password for the underlying bitcoind wallet which will also be unlocked.

func (ExchangeWalletElectrum) ValidateSecret added in v0.5.0 

func (btc ExchangeWalletElectrum) ValidateSecret(secret, secretHash []byte) bool

ValidateSecret checks that the secret satisfies the contract.

func (ExchangeWalletElectrum) Withdraw added in v0.5.0 

func (btc ExchangeWalletElectrum) Withdraw(address string, value, feeRate uint64) (asset.Coin, error)

Withdraw withdraws funds to the specified address. Fees are subtracted from the value. feeRate is in units of sats/byte. Withdraw satisfies asset.Withdrawer.

type ExchangeWalletFullNode added in v0.4.3 

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

ExchangeWalletFullNode implements Wallet and adds the FeeRate method.

func BTCCloneWallet 

func BTCCloneWallet(cfg *BTCCloneCFG) (*ExchangeWalletFullNode, error)

BTCCloneWallet creates a wallet backend for a set of network parameters and default network ports. A BTC clone can use this method, possibly in conjunction with ReadCloneParams, to create a ExchangeWallet for other assets with minimal coding.

func (ExchangeWalletFullNode) Connect added in v0.4.3 

func (btc ExchangeWalletFullNode) Connect(ctx context.Context) (*sync.WaitGroup, error)

Connect connects the wallet to the btc.Wallet backend and starts monitoring blocks and peers. Satisfies the dex.Connector interface.

func (*ExchangeWalletFullNode) FeeRate added in v0.4.3 

func (btc *ExchangeWalletFullNode) FeeRate() uint64

FeeRate satisfies asset.FeeRater.

func (ExchangeWalletFullNode) FindRedemption added in v0.4.3 

func (btc ExchangeWalletFullNode) FindRedemption(ctx context.Context, coinID, _ dex.Bytes) (redemptionCoin, secret dex.Bytes, err error)

FindRedemption watches for the input that spends the specified contract coin, and returns the spending input and the contract's secret key when it finds a spender.

This method blocks until the redemption is found, an error occurs or the provided context is canceled.

type ExchangeWalletSPV added in v0.4.1 

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

ExchangeWalletSPV embeds a ExchangeWallet, but also provides the Rescan method to implement asset.Rescanner.

func (*ExchangeWalletSPV) AccelerateOrder added in v0.5.0 

func (btc *ExchangeWalletSPV) AccelerateOrder(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, newFeeRate uint64) (asset.Coin, string, error)

AccelerateOrder uses the Child-Pays-For-Parent technique to accelerate a chain of swap transactions and previous accelerations. It broadcasts a new transaction with a fee high enough so that the average fee of all the unconfirmed transactions in the chain and the new transaction will have an average fee rate of newFeeRate. The changeCoin argument is the latest change in the order. It must be the input in the acceleration transaction in order for the order to be accelerated. requiredForRemainingSwaps is the amount of funds required to complete the rest of the swaps in the order. The change output of the acceleration transaction will have at least this amount.

The returned change coin may be nil, and should be checked before use.

func (*ExchangeWalletSPV) AccelerationEstimate added in v0.5.0 

func (btc *ExchangeWalletSPV) AccelerationEstimate(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, newFeeRate uint64) (uint64, error)

AccelerationEstimate takes the same parameters as AccelerateOrder, but instead of broadcasting the acceleration transaction, it just returns the amount of funds that will need to be spent in order to increase the average fee rate to the desired amount.

func (ExchangeWalletSPV) Connect added in v0.4.3 

func (btc ExchangeWalletSPV) Connect(ctx context.Context) (*sync.WaitGroup, error)

Connect connects the wallet to the btc.Wallet backend and starts monitoring blocks and peers. Satisfies the dex.Connector interface.

func (ExchangeWalletSPV) FindRedemption added in v0.4.3 

func (btc ExchangeWalletSPV) FindRedemption(ctx context.Context, coinID, _ dex.Bytes) (redemptionCoin, secret dex.Bytes, err error)

FindRedemption watches for the input that spends the specified contract coin, and returns the spending input and the contract's secret key when it finds a spender.

This method blocks until the redemption is found, an error occurs or the provided context is canceled.

func (*ExchangeWalletSPV) GetRecoveryCfg added in v0.5.0 

func (btc *ExchangeWalletSPV) GetRecoveryCfg() (map[string]string, error)

GetRecoveryCfg returns information that will help the wallet get back to its previous state after it is recreated. Part of the Recoverer interface.

func (*ExchangeWalletSPV) LogFilePath added in v0.4.1 

func (btc *ExchangeWalletSPV) LogFilePath() string

LogFilePath returns the path to the neutrino log file.

func (*ExchangeWalletSPV) Move added in v0.5.0 

func (btc *ExchangeWalletSPV) Move(backupDir string) error

Destroy will delete all the wallet files so the wallet can be recreated. Part of the Recoverer interface.

func (*ExchangeWalletSPV) PreAccelerate added in v0.5.0 

func (btc *ExchangeWalletSPV) PreAccelerate(swapCoins, accelerationCoins []dex.Bytes, changeCoin dex.Bytes, requiredForRemainingSwaps, feeSuggestion uint64) (uint64, *asset.XYRange, *asset.EarlyAcceleration, error)

PreAccelerate returns the current average fee rate of the unmined swap initiation and acceleration transactions, and also returns a suggested range that the fee rate should be increased to in order to expedite mining. The feeSuggestion argument is the current prevailing network rate. It is used to help determine the suggestedRange, which is a range meant to give the user a good amount of flexibility in determining the post acceleration effective fee rate, but still not allowing them to pick something outrageously high.

func (*ExchangeWalletSPV) Rescan added in v0.4.1 

func (btc *ExchangeWalletSPV) Rescan(_ context.Context) error

Rescan satisfies the asset.Rescanner interface, and issues a rescan wallet command if the backend is an SPV wallet.

type GetAddressInfoResult 

type GetAddressInfoResult struct {
	IsMine     bool   `json:"ismine"`
	Descriptor string `json:"desc"` // e.g. "wpkh([b940190e/84'/1'/0'/0/0]0300034...)#0pfw7rck"

	ParentDesc          string `json:"parent_desc"`         // e.g. "wpkh([b940190e/84'/1'/0']tpubDCo.../0/*)#xn4kr3dw" meaning range of external addresses
	HDKeyPath           string `json:"hdkeypath"`           // e.g. "m/84'/1'/0'/0/0"
	HDMasterFingerprint string `json:"hdmasterfingerprint"` // e.g. "b940190e"
}

GetAddressInfoResult models some of the data from the getaddressinfo command.

type GetBalancesResult 

type GetBalancesResult struct {
	Mine      Balances `json:"mine"`
	WatchOnly Balances `json:"watchonly"`
}

GetBalancesResult models a successful response from the getbalances request.

type GetTransactionResult 

type GetTransactionResult struct {
	// The meaning of Amount and Fee for "wallet" transactions is iffy (and they
	// are unused), so we are going to ignore them.  We have the raw tx (Hex) if
	// it is necessary to compute amounts from the inputs and outputs.
	// Amount         float64   `json:"amount"`
	// Fee            float64   `json:"fee"`
	Confirmations uint64 `json:"confirmations"`
	BlockHash     string `json:"blockhash"`
	BlockIndex    int64  `json:"blockindex"` // unused, consider commenting
	BlockTime     uint64 `json:"blocktime"`
	// BlockHeight   uint64    `json:"blockheight"` // unused, potentially work to obtain
	TxID         string    `json:"txid"`
	Time         uint64    `json:"time"`
	TimeReceived uint64    `json:"timereceived"`
	Hex          dex.Bytes `json:"hex"` // []byte, although it marshals/unmarshals a hex string

}

GetTransactionResult models the required data from the gettransaction command. Several fields from the bitcoind/btcwallet response that are both unneeded and difficult to satisfy are omitted. e.g. the native btcwallet and the external Electrum backends must jump through hoops to reproduce certain fields that are not strictly necessary.

type GetWalletInfoResult 

type GetWalletInfoResult struct {
	WalletName            string  `json:"walletname"`
	WalletVersion         uint32  `json:"walletversion"`
	Format                string  `json:"format"`
	Balance               float64 `json:"balance"`
	UnconfirmedBalance    float64 `json:"unconfirmed_balance"`
	ImmatureBalance       float64 `json:"immature_balance"`
	TxCount               uint32  `json:"txcount"`
	KeyPoolOldest         uint64  `json:"keypoololdest"`
	KeyPoolSize           uint32  `json:"keypoolsize"`
	KeyPoolSizeHDInternal uint32  `json:"keypoolsize_hd_internal"`
	PayTxFee              float64 `json:"paytxfee"`
	HdSeedID              string  `json:"hdseedid"`
	// UnlockedUntil is a pointer because for encrypted locked wallets, it will
	// be zero, but for unencrypted wallets the field won't be present in the
	// response.
	UnlockedUntil *int64 `json:"unlocked_until"`
	// HDMasterKeyID is dropped in Bitcoin Core 0.18
	HdMasterKeyID     string `json:"hdmasterkeyid"`
	PriveyKeysEnabled bool   `json:"private_keys_enabled"`
	// AvoidReuse and Scanning were added in Bitcoin Core 0.19
	AvoidReuse bool `json:"avoid_reuse"`
	// Scanning is either a struct or boolean false, and since we're not using
	// it, commenting avoids having to deal with marshaling for now.
	// Scanning   struct {
	// 	Duration uint32  `json:"duration"`
	// 	Progress float32 `json:"progress"`
	// } `json:"scanning"`
	Descriptors bool `json:"descriptors"` // Descriptor wallets that do not support dumpprivkey
}

GetWalletInfoResult models the data from the getwalletinfo command.

type ListUnspentResult 

type ListUnspentResult struct {
	TxID          string    `json:"txid"`
	Vout          uint32    `json:"vout"`
	Address       string    `json:"address"`
	Label         string    `json:"label"`
	ScriptPubKey  dex.Bytes `json:"scriptPubKey"`
	Amount        float64   `json:"amount"`
	Confirmations uint32    `json:"confirmations"`
	RedeemScript  dex.Bytes `json:"redeemScript"`
	Spendable     bool      `json:"spendable"`
	Solvable      bool      `json:"solvable"`
	SafePtr       *bool     `json:"safe"`
}

ListUnspentResult models a successful response from the listunspent request.

func (*ListUnspentResult) Safe 

func (l *ListUnspentResult) Safe() bool

type RPCConfig added in v0.5.0 

type RPCConfig struct {
	dexbtc.RPCConfig `ini:",extends"`
	WalletName       string `ini:"walletname"`
}

RPCConfig adds a wallet name to the basic configuration.

type RPCOutpoint 

type RPCOutpoint struct {
	TxID string `json:"txid"`
	Vout uint32 `json:"vout"`
}

RPCOutpoint is used to specify outputs to lock in calls to lockunspent.

type RPCWalletConfig added in v0.4.0 

type RPCWalletConfig struct {
	RPCConfig    `ini:",extends"`
	WalletConfig `ini:",extends"`
}

RPCWalletConfig is a combination of RPCConfig and WalletConfig. Used for a wallet based on a bitcoind-like RPC API.

type RawRequester added in v0.2.0 

type RawRequester interface {
	RawRequest(string, []json.RawMessage) (json.RawMessage, error)
}

RawRequester defines decred's rpcclient RawRequest func where all RPC requests sent through. For testing, it can be satisfied by a stub.

type RawRequesterWithContext added in v0.4.0 

type RawRequesterWithContext interface {
	RawRequest(context.Context, string, []json.RawMessage) (json.RawMessage, error)
}

RawRequesterWithContext defines decred's rpcclient RawRequest func where all RPC requests sent through. For testing, it can be satisfied by a stub.

type RecoveryCfg added in v0.5.0 

type RecoveryCfg struct {
	NumExternalAddresses uint32 `ini:"numexternaladdr"`
	NumInternalAddresses uint32 `ini:"numinternaladdr"`
}

RecoveryCfg is the information that is transferred from the old wallet to the new one when the wallet is recovered.

type SignTxError 

type SignTxError struct {
	TxID      string    `json:"txid"`
	Vout      uint32    `json:"vout"`
	ScriptSig dex.Bytes `json:"scriptSig"`
	Sequence  uint64    `json:"sequence"`
	Error     string    `json:"error"`
}

SignTxError models the data that contains script verification errors from the signrawtransaction request

type SignTxResult 

type SignTxResult struct {
	Hex      dex.Bytes      `json:"hex"`
	Complete bool           `json:"complete"`
	Errors   []*SignTxError `json:"errors"`
}

SignTxResult models the data from the signrawtransaction command.

type TxInSigner added in v0.2.0 

type TxInSigner func(tx *wire.MsgTx, idx int, subScript []byte, hashType txscript.SigHashType,
	key *btcec.PrivateKey, vals []int64, prevScripts [][]byte) ([]byte, error)

TxInSigner is a transaction input signer. In addition to the standard Bitcoin arguments, TxInSigner receives all values and pubkey scripts for previous outpoints spent in this transaction.

type Wallet added in v0.4.0 

type Wallet interface {
	RawRequester // for estimateFee calls
	// contains filtered or unexported methods
}

Wallet is the interface that BTC wallet backends must implement. TODO: plumb all requests with a context.Context.

type WalletConfig added in v0.4.0 

type WalletConfig struct {
	UseSplitTx       bool    `ini:"txsplit"`
	FallbackFeeRate  float64 `ini:"fallbackfee"`
	FeeRateLimit     float64 `ini:"feeratelimit"`
	RedeemConfTarget uint64  `ini:"redeemconftarget"`
	ActivelyUsed     bool    `ini:"special_activelyUsed"` // injected by core
	Birthday         uint64  `ini:"walletbirthday"`       // SPV
	ApiFeeFallback   bool    `ini:"apifeefallback"`
}

WalletConfig are wallet-level configuration settings.

Source Files

View all Source files

Directories

Path Synopsis
Package electrum provides a client for an ElectrumX server.
 Package electrum provides a client for an ElectrumX server.
example/server
example/wallet

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