proto

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 Go to latest Published: Oct 12, 2019 License: MIT Imports: 24 Imported by: 0

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Constants

View Source 
const (
	// FCSignedIdentiferSize is the size of a ContractSignedIdentifier
	FCSignedIdentiferSize = 80 // 32 bytes identifier, 32 bytes signature, 16 bytes prefix
)

Variables

This section is empty.

Functions

func GenerateKeyPair added in v1.4.0 

func GenerateKeyPair(renterSeed EphemeralRenterSeed, txn types.Transaction) (sk crypto.SecretKey, pk crypto.PublicKey)

GenerateKeyPair generates a secret and a public key for a contract to be used in its unlock conditions.

func GenerateKeyPairWithOutputID added in v1.4.0 

func GenerateKeyPairWithOutputID(renterSeed EphemeralRenterSeed, inputParentID types.SiacoinOutputID) (sk crypto.SecretKey, pk crypto.PublicKey)

GenerateKeyPairWithOutputID generates a secret and a public key for a contract to be used in its unlock conditions.

func IsRevisionMismatch 

func IsRevisionMismatch(err error) bool

IsRevisionMismatch returns true if err was caused by the host reporting a different revision number than expected.

Types

type ContractParams 

type ContractParams struct {
	Allowance     modules.Allowance
	Host          modules.HostDBEntry
	Funding       types.Currency
	StartHeight   types.BlockHeight
	EndHeight     types.BlockHeight
	RefundAddress types.UnlockHash
	RenterSeed    EphemeralRenterSeed
}

ContractParams are supplied as an argument to FormContract.

type ContractSet added in v1.3.1 

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

A ContractSet provides safe concurrent access to a set of contracts. Its purpose is to serialize modifications to individual contracts, as well as to provide operations on the set as a whole.

func NewContractSet added in v1.3.1 

func NewContractSet(dir string, deps modules.Dependencies) (*ContractSet, error)

NewContractSet returns a ContractSet storing its contracts in the specified dir.

func (*ContractSet) Acquire added in v1.3.1 

func (cs *ContractSet) Acquire(id types.FileContractID) (*SafeContract, bool)

Acquire looks up the contract for the specified host key and locks it before returning it. If the contract is not present in the set, Acquire returns false and a zero-valued RenterContract.

func (*ContractSet) Close added in v1.3.1 

func (cs *ContractSet) Close() error

Close closes all contracts in a contract set, this means rendering it unusable for I/O

func (*ContractSet) ConvertV130Contract added in v1.3.1 

func (cs *ContractSet) ConvertV130Contract(c V130Contract, cr V130CachedRevision) error

ConvertV130Contract creates a contract file for a v130 contract.

func (*ContractSet) Delete added in v1.3.1 

func (cs *ContractSet) Delete(c *SafeContract)

Delete removes a contract from the set. The contract must have been previously acquired by Acquire. If the contract is not present in the set, Delete is a no-op.

func (*ContractSet) FormContract added in v1.3.1 

func (cs *ContractSet) FormContract(params ContractParams, txnBuilder transactionBuilder, tpool transactionPool, hdb hostDB, cancel <-chan struct{}) (rc modules.RenterContract, err error)

FormContract forms a contract with a host and submits the contract transaction to tpool. The contract is added to the ContractSet and its metadata is returned.

func (*ContractSet) IDs added in v1.3.1 

func (cs *ContractSet) IDs() []types.FileContractID

IDs returns the fcid of each contract with in the set. The contracts are not locked.

func (*ContractSet) InsertContract added in v1.4.0 

func (cs *ContractSet) InsertContract(rc modules.RecoverableContract, revTxn types.Transaction, roots []crypto.Hash, sk crypto.SecretKey) (modules.RenterContract, error)

InsertContract inserts an existing contract into the set.

func (*ContractSet) Len added in v1.3.1 

func (cs *ContractSet) Len() int

Len returns the number of contracts in the set.

func (*ContractSet) NewDownloader added in v1.3.1 

func (cs *ContractSet) NewDownloader(host modules.HostDBEntry, id types.FileContractID, currentHeight types.BlockHeight, hdb hostDB, cancel <-chan struct{}) (_ *Downloader, err error)

NewDownloader initiates the download request loop with a host, and returns a Downloader.

func (*ContractSet) NewEditor added in v1.3.1 

func (cs *ContractSet) NewEditor(host modules.HostDBEntry, id types.FileContractID, currentHeight types.BlockHeight, hdb hostDB, cancel <-chan struct{}) (_ *Editor, err error)

NewEditor initiates the contract revision process with a host, and returns an Editor.

func (*ContractSet) NewRawSession added in v1.4.0 

func (cs *ContractSet) NewRawSession(host modules.HostDBEntry, currentHeight types.BlockHeight, hdb hostDB, cancel <-chan struct{}) (_ *Session, err error)

NewRawSession creates a new session unassociated with any contract.

func (*ContractSet) NewSession added in v1.4.0 

func (cs *ContractSet) NewSession(host modules.HostDBEntry, id types.FileContractID, currentHeight types.BlockHeight, hdb hostDB, cancel <-chan struct{}) (_ *Session, err error)

NewSession initiates the RPC loop with a host and returns a Session.

func (*ContractSet) RateLimits added in v1.3.3 

func (cs *ContractSet) RateLimits() (readBPS int64, writeBPS int64, packetSize uint64)

RateLimits sets the bandwidth limits for connections created by the contractSet.

func (*ContractSet) Renew added in v1.3.1 

func (cs *ContractSet) Renew(oldContract *SafeContract, params ContractParams, txnBuilder transactionBuilder, tpool transactionPool, hdb hostDB, cancel <-chan struct{}) (rc modules.RenterContract, err error)

Renew negotiates a new contract for data already stored with a host, and submits the new contract transaction to tpool. The new contract is added to the ContractSet and its metadata is returned.

func (*ContractSet) Return added in v1.3.1 

func (cs *ContractSet) Return(c *SafeContract)

Return returns a locked contract to the set and unlocks it. The contract must have been previously acquired by Acquire. If the contract is not present in the set, Return panics.

func (*ContractSet) SetRateLimits added in v1.3.3 

func (cs *ContractSet) SetRateLimits(readBPS int64, writeBPS int64, packetSize uint64)

SetRateLimits sets the bandwidth limits for connections created by the contractSet.

func (*ContractSet) View added in v1.3.1 

func (cs *ContractSet) View(id types.FileContractID) (modules.RenterContract, bool)

View returns a copy of the contract with the specified host key. The contracts is not locked. Certain fields, including the MerkleRoots, are set to nil for safety reasons. If the contract is not present in the set, View returns false and a zero-valued RenterContract.

func (*ContractSet) ViewAll added in v1.3.1 

func (cs *ContractSet) ViewAll() []modules.RenterContract

ViewAll returns the metadata of each contract in the set. The contracts are not locked.

type ContractSignedIdentifier added in v1.4.0 

type ContractSignedIdentifier [FCSignedIdentiferSize]byte

ContractSignedIdentifier is an identifer with a prefix and appended signature, ready to be stored in the arbitrary data section of a transaction.

func PrefixedSignedIdentifier added in v1.4.0 

func PrefixedSignedIdentifier(renterSeed EphemeralRenterSeed, txn types.Transaction, hostKey types.SiaPublicKey) (ContractSignedIdentifier, crypto.Ciphertext)

PrefixedSignedIdentifier is a helper function that creates a prefixed and signed identifier using a renter key and the first siacoin input of a transaction. NOTE: Always use PrefixedSignedIdentifier when creating identifiers for filecontracts. It wipes all the secrets required for creating the identifier from memory safely.

func (ContractSignedIdentifier) IsValid added in v1.4.0 

func (csi ContractSignedIdentifier) IsValid(renterSeed EphemeralRenterSeed, txn types.Transaction, hostKey crypto.Ciphertext) (types.SiaPublicKey, bool)

IsValid checks the signature against a seed and contract to determine if it was created using the specified seed.

type Downloader 

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

A Downloader retrieves sectors by calling the download RPC on a host. Downloaders are NOT thread- safe; calls to Sector must be serialized.

func (*Downloader) Close 

func (hd *Downloader) Close() error

Close cleanly terminates the download loop with the host and closes the connection.

func (*Downloader) Download added in v1.4.0 

func (hd *Downloader) Download(root crypto.Hash, offset, length uint32) (_ modules.RenterContract, _ []byte, err error)

Download retrieves the requested sector data and revises the underlying contract to pay the host proportionally to the data retrieved.

type Editor 

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

A Editor modifies a Contract by calling the revise RPC on a host. It Editors are NOT thread-safe; calls to Upload must happen in serial.

func (*Editor) Close 

func (he *Editor) Close() error

Close cleanly terminates the revision loop with the host and closes the connection.

func (*Editor) Upload 

func (he *Editor) Upload(data []byte) (_ modules.RenterContract, _ crypto.Hash, err error)

Upload negotiates a revision that adds a sector to a file contract.

type EphemeralRenterSeed added in v1.4.0 

type EphemeralRenterSeed RenterSeed

EphemeralRenterSeed is a renter seed derived from the master renter seed. The master seed should never be used directly.

type MerkleRootSet added in v1.3.1 

type MerkleRootSet []crypto.Hash

MerkleRootSet is a set of Merkle roots, and gets encoded more efficiently.

func (MerkleRootSet) MarshalJSON added in v1.3.1 

func (mrs MerkleRootSet) MarshalJSON() ([]byte, error)

MarshalJSON defines a JSON encoding for a MerkleRootSet.

func (*MerkleRootSet) UnmarshalJSON added in v1.3.1 

func (mrs *MerkleRootSet) UnmarshalJSON(b []byte) error

UnmarshalJSON attempts to decode a MerkleRootSet, falling back on the legacy decoding of a []crypto.Hash if that fails.

type RenterSeed added in v1.4.0 

type RenterSeed modules.Seed

RenterSeed is the master seed of the renter which is used to derive other seeds.

func DeriveRenterSeed added in v1.4.0 

func DeriveRenterSeed(walletSeed modules.Seed) RenterSeed

DeriveRenterSeed creates a renterSeed for creating file contracts. NOTE: The seed returned by this function should be wiped once it's no longer in use.

func (RenterSeed) EphemeralRenterSeed added in v1.4.0 

func (rs RenterSeed) EphemeralRenterSeed(windowStart types.BlockHeight) EphemeralRenterSeed

EphemeralRenterSeed creates a renterSeed for creating file contracts. NOTE: The seed returned by this function should be wiped once it's no longer in use.

type SafeContract added in v1.3.1 

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

A SafeContract contains the most recent revision transaction negotiated with a host, and the secret key used to sign it.

func (*SafeContract) Metadata added in v1.3.1 

func (c *SafeContract) Metadata() modules.RenterContract

Metadata returns the metadata of a renter contract

func (*SafeContract) UpdateUtility added in v1.3.3 

func (c *SafeContract) UpdateUtility(utility modules.ContractUtility) error

UpdateUtility updates the utility field of a contract.

func (*SafeContract) Utility added in v1.3.3 

func (c *SafeContract) Utility() modules.ContractUtility

Utility returns the contract utility for the contract.

type Session added in v1.4.0 

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

A Session is an ongoing exchange of RPCs via the renter-host protocol.

TODO: The session type needs access to a logger. Probably the renter logger.

func (*Session) Append added in v1.4.0 

func (s *Session) Append(data []byte) (_ modules.RenterContract, _ crypto.Hash, err error)

Append calls the Write RPC with a single Append action, returning the updated contract and the Merkle root of the appended sector.

func (*Session) Close added in v1.4.0 

func (s *Session) Close() error

Close cleanly terminates the protocol session with the host and closes the connection.

func (*Session) Lock added in v1.4.0 

func (s *Session) Lock(id types.FileContractID, secretKey crypto.SecretKey) (types.FileContractRevision, []types.TransactionSignature, error)

Lock calls the Lock RPC, locking the supplied contract and returning its most recent revision.

func (*Session) Read added in v1.4.0 

func (s *Session) Read(w io.Writer, req modules.LoopReadRequest, cancel <-chan struct{}) (_ modules.RenterContract, err error)

Read calls the Read RPC, writing the requested data to w. The RPC can be cancelled (with a granularity of one section) via the cancel channel.

func (*Session) ReadSection added in v1.4.0 

func (s *Session) ReadSection(root crypto.Hash, offset, length uint32) (_ modules.RenterContract, _ []byte, err error)

ReadSection calls the Read RPC with a single section and returns the requested data. A Merkle proof is always requested.

func (*Session) RecoverSectorRoots added in v1.4.0 

func (s *Session) RecoverSectorRoots(lastRev types.FileContractRevision, sk crypto.SecretKey) (_ types.Transaction, _ []crypto.Hash, err error)

RecoverSectorRoots calls the contract roots download RPC and returns the requested sector roots. The Revision and Signature fields of req are filled in automatically. If a Merkle proof is requested, it is verified.

func (*Session) Replace added in v1.4.1 

func (s *Session) Replace(data []byte, sectorIndex uint64, trim bool) (_ modules.RenterContract, _ crypto.Hash, err error)

Replace calls the Write RPC with a series of actions that replace the sector at the specified index with data, returning the updated contract and the Merkle root of the new sector.

func (*Session) SectorRoots added in v1.4.0 

func (s *Session) SectorRoots(req modules.LoopSectorRootsRequest) (_ modules.RenterContract, _ []crypto.Hash, err error)

SectorRoots calls the contract roots download RPC and returns the requested sector roots. The Revision and Signature fields of req are filled in automatically. If a Merkle proof is requested, it is verified.

func (*Session) Settings added in v1.4.0 

func (s *Session) Settings() (modules.HostExternalSettings, error)

Settings calls the Settings RPC, returning the host's reported settings.

func (*Session) Unlock added in v1.4.0 

func (s *Session) Unlock() error

Unlock calls the Unlock RPC, unlocking the currently-locked contract.

func (*Session) Write added in v1.4.0 

func (s *Session) Write(actions []modules.LoopWriteAction) (_ modules.RenterContract, err error)

Write implements the Write RPC, except for ActionUpdate. A Merkle proof is always requested.

type V130CachedRevision added in v1.3.1 

type V130CachedRevision struct {
	Revision    types.FileContractRevision `json:"revision"`
	MerkleRoots modules.MerkleRootSet      `json:"merkleroots"`
}

A V130CachedRevision contains changes that would be applied to a RenterContract if a contract revision succeeded.

type V130Contract added in v1.3.1 

type V130Contract struct {
	HostPublicKey    types.SiaPublicKey         `json:"hostpublickey"`
	ID               types.FileContractID       `json:"id"`
	LastRevision     types.FileContractRevision `json:"lastrevision"`
	LastRevisionTxn  types.Transaction          `json:"lastrevisiontxn"`
	MerkleRoots      MerkleRootSet              `json:"merkleroots"`
	SecretKey        crypto.SecretKey           `json:"secretkey"`
	StartHeight      types.BlockHeight          `json:"startheight"`
	DownloadSpending types.Currency             `json:"downloadspending"`
	StorageSpending  types.Currency             `json:"storagespending"`
	UploadSpending   types.Currency             `json:"uploadspending"`
	TotalCost        types.Currency             `json:"totalcost"`
	ContractFee      types.Currency             `json:"contractfee"`
	TxnFee           types.Currency             `json:"txnfee"`
	SiafundFee       types.Currency             `json:"siafundfee"`
}

A V130Contract specifies the v130 contract format.

func (*V130Contract) EndHeight added in v1.3.1 

func (c *V130Contract) EndHeight() types.BlockHeight

EndHeight returns the height at which the host is no longer obligated to store contract data.

func (*V130Contract) RenterFunds added in v1.3.1 

func (c *V130Contract) RenterFunds() types.Currency

RenterFunds returns the funds remaining in the contract's Renter payout as of the most recent revision.

Source Files

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