environment

package
v0.34.0-crescendo-prev... Latest Latest
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 Go to latest Published: Apr 25, 2024 License: AGPL-3.0 Imports: 47 Imported by: 5

Documentation

Index

Constants

View Source 
const (
	// [2_000, 3_000) reserved for the FVM
	ComputationKindHash = 2001 + iota
	ComputationKindVerifySignature
	ComputationKindAddAccountKey
	ComputationKindAddEncodedAccountKey
	ComputationKindAllocateStorageIndex
	ComputationKindCreateAccount
	ComputationKindEmitEvent
	ComputationKindGenerateUUID
	ComputationKindGetAccountAvailableBalance
	ComputationKindGetAccountBalance
	ComputationKindGetAccountContractCode
	ComputationKindGetAccountContractNames
	ComputationKindGetAccountKey
	ComputationKindGetBlockAtHeight
	ComputationKindGetCode
	ComputationKindGetCurrentBlockHeight

	ComputationKindGetStorageCapacity
	ComputationKindGetStorageUsed
	ComputationKindGetValue
	ComputationKindRemoveAccountContractCode
	ComputationKindResolveLocation
	ComputationKindRevokeAccountKey

	ComputationKindSetValue
	ComputationKindUpdateAccountContractCode
	ComputationKindValidatePublicKey
	ComputationKindValueExists
	ComputationKindAccountKeysCount
	ComputationKindBLSVerifyPOP
	ComputationKindBLSAggregateSignatures
	ComputationKindBLSAggregatePublicKeys
	ComputationKindGetOrLoadProgram
	ComputationKindGenerateAccountLocalID
	ComputationKindGetRandomSourceHistory
	ComputationKindEVMGasUsage
	ComputationKindRLPEncoding
	ComputationKindRLPDecoding
	ComputationKindEncodeEvent

	ComputationKindEVMEncodeABI
	ComputationKindEVMDecodeABI
)
View Source 
const (
	// The max value for any is uuid partition is MaxUint56, since one byte
	// in the uuid is used for partitioning.
	MaxUint56 = (uint64(1) << 56) - 1

	// Start warning when there's only a single high bit left.  This should give
	// us plenty of time to migrate to larger counters.
	Uint56OverflowWarningThreshold = (uint64(1) << 55) - 1
)
View Source 
const (
	DefaultEventCollectionByteSizeLimit = 256_000 // 256KB
)
View Source 
const (
	MaxPublicKeyCount = math.MaxUint64
)

Variables

View Source 
var MainnetExecutionEffortWeights = meter.ExecutionEffortWeights{
	common.ComputationKindStatement:          1569,
	common.ComputationKindLoop:               1569,
	common.ComputationKindFunctionInvocation: 1569,
	ComputationKindGetValue:                  808,
	ComputationKindCreateAccount:             2837670,
	ComputationKindSetValue:                  765,
}

MainnetExecutionEffortWeights are the execution effort weights as they are on mainnet from 18.8.2022

Functions

func FlowFeesAddress 

func FlowFeesAddress(chain flow.Chain) flow.Address

func FlowToRuntimeAccountKey added in v0.29.0 

func FlowToRuntimeAccountKey(
	flowKey flow.AccountPublicKey,
) (
	*runtime.AccountKey,
	error,
)

func IsServiceEvent 

func IsServiceEvent(eventType flow.EventType, chain flow.ChainID) (bool, error)

IsServiceEvent determines whether or not an emitted Cadence event is considered a service event for the given chain.

func IsValidAccountKeyHashAlgo 

func IsValidAccountKeyHashAlgo(algo hash.HashingAlgorithm) bool

func IsValidAccountKeySignAlgo 

func IsValidAccountKeySignAlgo(algo crypto.SigningAlgorithm) bool

func NewAccountKeyUpdater 

func NewAccountKeyUpdater(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
	txnState state.NestedTransactionPreparer,
	env Environment,
) *accountKeyUpdater

func NewAccountPublicKey 

func NewAccountPublicKey(publicKey *runtime.PublicKey,
	hashAlgo sema.HashAlgorithm,
	keyIndex int,
	weight int,
) (
	*flow.AccountPublicKey,
	error,
)

NewAccountPublicKey construct an account public key given a runtime public key.

func NewScriptEnv added in v0.30.0 

func NewScriptEnv(
	ctx context.Context,
	tracer tracing.TracerSpan,
	params EnvironmentParams,
	txnState storage.TransactionPreparer,
) *facadeEnvironment

func NewScriptEnvironmentFromStorageSnapshot added in v0.30.0 

func NewScriptEnvironmentFromStorageSnapshot(
	params EnvironmentParams,
	storageSnapshot snapshot.StorageSnapshot,
) *facadeEnvironment

This is mainly used by command line tools, the emulator, and cadence tools testing.

func NewTransactionEnvironment 

func NewTransactionEnvironment(
	tracer tracing.TracerSpan,
	params EnvironmentParams,
	txnState storage.TransactionPreparer,
) *facadeEnvironment

func NewUUIDGenerator 

func NewUUIDGenerator(
	tracer tracing.TracerSpan,
	log zerolog.Logger,
	meter Meter,
	txnState state.NestedTransactionPreparer,
	blockHeader *flow.Header,
	txnIndex uint32,
) *uUIDGenerator

func RegisterSize 

func RegisterSize(id flow.RegisterID, value flow.RegisterValue) int

func ServiceAddress 

func ServiceAddress(chain flow.Chain) flow.Address

func StorageMBUFixToBytesUInt 

func StorageMBUFixToBytesUInt(result cadence.Value) uint64

StorageMBUFixToBytesUInt converts the return type of storage capacity which is a UFix64 with the unit of megabytes to UInt with the unit of bytes

Types

type AccountCreator 

type AccountCreator interface {
	CreateAccount(runtimePayer common.Address) (common.Address, error)
}

func NewAccountCreator 

func NewAccountCreator(
	txnState state.NestedTransactionPreparer,
	chain flow.Chain,
	accounts Accounts,
	isServiceAccountEnabled bool,
	tracer tracing.TracerSpan,
	meter Meter,
	metrics MetricsReporter,
	systemContracts *SystemContracts,
) AccountCreator

func NewParseRestrictedAccountCreator 

func NewParseRestrictedAccountCreator(
	txnState state.NestedTransactionPreparer,
	creator AccountCreator,
) AccountCreator

type AccountInfo 

type AccountInfo interface {
	// Cadence's runtime APIs.
	GetStorageUsed(runtimeaddress common.Address) (uint64, error)
	GetStorageCapacity(runtimeAddress common.Address) (uint64, error)
	GetAccountBalance(runtimeAddress common.Address) (uint64, error)
	GetAccountAvailableBalance(runtimeAddress common.Address) (uint64, error)

	GetAccount(address flow.Address) (*flow.Account, error)
}

AccountInfo exposes various account balance and storage statistics.

func NewAccountInfo 

func NewAccountInfo(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
	systemContracts *SystemContracts,
	serviceAccountEnabled bool,
) AccountInfo

func NewParseRestrictedAccountInfo 

func NewParseRestrictedAccountInfo(
	txnState state.NestedTransactionPreparer,
	impl AccountInfo,
) AccountInfo

type AccountKeyReader 

type AccountKeyReader interface {
	// GetAccountKey retrieves a public key by index from an existing account.
	//
	// This function returns a nil key with no errors, if a key doesn't exist at
	// the given index. An error is returned if the specified account does not
	// exist, the provided index is not valid, or if the key retrieval fails.
	GetAccountKey(
		runtimeAddress common.Address,
		keyIndex int,
	) (
		*runtime.AccountKey,
		error,
	)
	AccountKeysCount(runtimeAddress common.Address) (uint64, error)
}

AccountKeyReader provide read access to account keys.

func NewAccountKeyReader 

func NewAccountKeyReader(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
) AccountKeyReader

func NewParseRestrictedAccountKeyReader added in v0.28.1 

func NewParseRestrictedAccountKeyReader(
	txnState state.NestedTransactionPreparer,
	impl AccountKeyReader,
) AccountKeyReader

type AccountKeyUpdater 

type AccountKeyUpdater interface {

	// AddAccountKey adds a public key to an existing account.
	//
	// This function returns an error if the specified account does not exist or
	// if the key insertion fails.
	//
	// Note that the script variant will return OperationNotSupportedError.
	AddAccountKey(
		runtimeAddress common.Address,
		publicKey *runtime.PublicKey,
		hashAlgo runtime.HashAlgorithm,
		weight int,
	) (
		*runtime.AccountKey,
		error,
	)

	// RevokeAccountKey revokes a public key by index from an existing account,
	// and returns the revoked key.
	//
	// This function returns a nil key with no errors, if a key doesn't exist
	// at the given index.  An error is returned if the specified account does
	// not exist, the provided index is not valid, or if the key revoking
	// fails.
	//
	// Note that the script variant will return OperationNotSupportedError.
	RevokeAccountKey(
		runtimeAddress common.Address,
		keyIndex int,
	) (
		*runtime.AccountKey,
		error,
	)
}

AccountKeyUpdater handles all account keys modification.

Note that scripts cannot modify account keys, but must expose the API in compliance with the runtime environment interface.

type AccountLocalIDGenerator added in v0.31.0 

type AccountLocalIDGenerator interface {
	GenerateAccountID(address common.Address) (uint64, error)
}

func NewAccountLocalIDGenerator added in v0.31.0 

func NewAccountLocalIDGenerator(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
) AccountLocalIDGenerator

func NewParseRestrictedAccountLocalIDGenerator added in v0.31.0 

func NewParseRestrictedAccountLocalIDGenerator(
	txnState state.NestedTransactionPreparer,
	impl AccountLocalIDGenerator,
) AccountLocalIDGenerator

type AccountStatus 

type AccountStatus [accountStatusSize]byte

AccountStatus holds meta information about an account

currently modelled as a byte array with on-demand encoding/decoding of sub arrays the first byte captures flags the next 8 bytes (big-endian) captures storage used by an account the next 8 bytes (big-endian) captures the storage index of an account the next 8 bytes (big-endian) captures the number of public keys stored on this account the next 8 bytes (big-endian) captures the current address id counter

func AccountStatusFromBytes 

func AccountStatusFromBytes(inp []byte) (*AccountStatus, error)

AccountStatusFromBytes constructs an AccountStatus from the given byte slice

func NewAccountStatus 

func NewAccountStatus() *AccountStatus

NewAccountStatus returns a new AccountStatus sets the storage index to the init value

func (*AccountStatus) AccountIdCounter added in v0.31.0 

func (a *AccountStatus) AccountIdCounter() uint64

AccountIdCounter returns id counter of the account

func (*AccountStatus) PublicKeyCount 

func (a *AccountStatus) PublicKeyCount() uint64

PublicKeyCount returns the public key count of the account

func (*AccountStatus) SetAccountIdCounter added in v0.31.0 

func (a *AccountStatus) SetAccountIdCounter(id uint64)

SetAccountIdCounter updates id counter of the account

func (*AccountStatus) SetPublicKeyCount 

func (a *AccountStatus) SetPublicKeyCount(count uint64)

SetPublicKeyCount updates the public key count of the account

func (*AccountStatus) SetStorageIndex 

func (a *AccountStatus) SetStorageIndex(index atree.StorageIndex)

SetStorageIndex updates the storage index of the account

func (*AccountStatus) SetStorageUsed 

func (a *AccountStatus) SetStorageUsed(used uint64)

SetStorageUsed updates the storage used by the account

func (*AccountStatus) StorageIndex 

func (a *AccountStatus) StorageIndex() atree.StorageIndex

StorageIndex returns the storage index of the account

func (*AccountStatus) StorageUsed 

func (a *AccountStatus) StorageUsed() uint64

StorageUsed returns the storage used by the account

func (*AccountStatus) ToBytes 

func (a *AccountStatus) ToBytes() []byte

ToBytes converts AccountStatus to a byte slice

this has been kept this way in case one day we decided to move on to use a struct to represent account status.

type Accounts 

type Accounts interface {
	Exists(address flow.Address) (bool, error)
	Get(address flow.Address) (*flow.Account, error)
	GetPublicKeyCount(address flow.Address) (uint64, error)
	AppendPublicKey(address flow.Address, key flow.AccountPublicKey) error
	GetPublicKey(address flow.Address, keyIndex uint64) (flow.AccountPublicKey, error)
	SetPublicKey(address flow.Address, keyIndex uint64, publicKey flow.AccountPublicKey) ([]byte, error)
	GetContractNames(address flow.Address) ([]string, error)
	GetContract(contractName string, address flow.Address) ([]byte, error)
	ContractExists(contractName string, address flow.Address) (bool, error)
	SetContract(contractName string, address flow.Address, contract []byte) error
	DeleteContract(contractName string, address flow.Address) error
	Create(publicKeys []flow.AccountPublicKey, newAddress flow.Address) error
	GetValue(id flow.RegisterID) (flow.RegisterValue, error)
	GetStorageUsed(address flow.Address) (uint64, error)
	SetValue(id flow.RegisterID, value flow.RegisterValue) error
	AllocateStorageIndex(address flow.Address) (atree.StorageIndex, error)
	GenerateAccountLocalID(address flow.Address) (uint64, error)
}

type AddressGenerator 

type AddressGenerator interface {
	Bytes() []byte
	NextAddress() (flow.Address, error)
	CurrentAddress() flow.Address
	AddressCount() uint64
}

func NewAddressGenerator 

func NewAddressGenerator(
	txnState state.NestedTransactionPreparer,
	chain flow.Chain,
) AddressGenerator

type BlockInfo 

type BlockInfo interface {
	// GetCurrentBlockHeight returns the current block height.
	GetCurrentBlockHeight() (uint64, error)

	// GetBlockAtHeight returns the block at the given height.
	GetBlockAtHeight(
		height uint64,
	) (
		runtime.Block,
		bool,
		error,
	)
}

func NewBlockInfo 

func NewBlockInfo(
	tracer tracing.TracerSpan,
	meter Meter,
	blockHeader *flow.Header,
	blocks Blocks,
) BlockInfo

func NewParseRestrictedBlockInfo added in v0.28.1 

func NewParseRestrictedBlockInfo(
	txnState storage.TransactionPreparer,
	impl BlockInfo,
) BlockInfo

type BlockInfoParams 

type BlockInfoParams struct {
	Blocks      Blocks
	BlockHeader *flow.Header
}

func DefaultBlockInfoParams 

func DefaultBlockInfoParams() BlockInfoParams

type Blocks 

type Blocks interface {
	// ByHeight returns the block at the given height in the chain ending in `header` (or finalized
	// if `header` is nil). This enables querying un-finalized blocks by height with respect to the
	// chain defined by the block we are executing.
	ByHeightFrom(height uint64, header *flow.Header) (*flow.Header, error)
}

func NewBlockFinder 

func NewBlockFinder(storage storage.Headers) Blocks

NewBlockFinder constructs a new block finder

type BlocksFinder 

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

BlocksFinder finds blocks and return block headers

func (*BlocksFinder) ByHeightFrom 

func (finder *BlocksFinder) ByHeightFrom(height uint64, header *flow.Header) (*flow.Header, error)

ByHeightFrom returns the block header by height.

type BootstrapAccountCreator 

type BootstrapAccountCreator interface {
	CreateBootstrapAccount(
		publicKeys []flow.AccountPublicKey,
	) (
		flow.Address,
		error,
	)
}

func NewBootstrapAccountCreator 

func NewBootstrapAccountCreator(
	txnState state.NestedTransactionPreparer,
	chain flow.Chain,
	accounts Accounts,
) BootstrapAccountCreator

type CadenceEventEncoder added in v0.29.0 

type CadenceEventEncoder struct{}

func NewCadenceEventEncoder added in v0.29.0 

func NewCadenceEventEncoder() *CadenceEventEncoder

func (*CadenceEventEncoder) Encode added in v0.29.0 

func (e *CadenceEventEncoder) Encode(event cadence.Event) ([]byte, error)

type ContractFunctionInvoker added in v0.33.30 

type ContractFunctionInvoker interface {
	Invoke(
		spec ContractFunctionSpec,
		arguments []cadence.Value,
	) (
		cadence.Value,
		error,
	)
}

ContractFunctionInvoker invokes a contract function

type ContractFunctionSpec 

type ContractFunctionSpec struct {
	AddressFromChain func(flow.Chain) flow.Address
	LocationName     string
	FunctionName     string
	ArgumentTypes    []sema.Type
}

ContractFunctionSpec specify all the information, except the function's address and arguments, needed to invoke the contract function.

type ContractReader 

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

ContractReader provide read access to contracts.

func NewContractReader 

func NewContractReader(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
) *ContractReader

func (*ContractReader) GetAccountContractCode 

func (reader *ContractReader) GetAccountContractCode(
	location common.AddressLocation,
) (
	[]byte,
	error,
)

func (*ContractReader) GetAccountContractNames 

func (reader *ContractReader) GetAccountContractNames(
	runtimeAddress common.Address,
) (
	[]string,
	error,
)

func (*ContractReader) GetCode 

func (reader *ContractReader) GetCode(
	location runtime.Location,
) (
	[]byte,
	error,
)

func (*ContractReader) ResolveLocation 

func (reader *ContractReader) ResolveLocation(
	identifiers []runtime.Identifier,
	location runtime.Location,
) (
	[]runtime.ResolvedLocation,
	error,
)

type ContractUpdate added in v0.29.0 

type ContractUpdate struct {
	Location common.AddressLocation
	Code     []byte
}

type ContractUpdater 

type ContractUpdater interface {
	// Cadence's runtime API.  Note that the script variant will return
	// OperationNotSupportedError.
	UpdateAccountContractCode(
		location common.AddressLocation,
		code []byte,
	) error

	// Cadence's runtime API.  Note that the script variant will return
	// OperationNotSupportedError.
	RemoveAccountContractCode(location common.AddressLocation) error

	Commit() (ContractUpdates, error)

	Reset()
}

ContractUpdater handles all smart contracts modification. It captures contract updates and defer the updates to the end of the txn execution.

Note that scripts cannot modify smart contracts, but must expose the API in compliance with the runtime environment interface.

type ContractUpdaterImpl added in v0.29.0 

type ContractUpdaterImpl struct {
	ContractUpdaterStubs
	// contains filtered or unexported fields
}

func NewContractUpdater 

func NewContractUpdater(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
	signingAccounts []flow.Address,
	chain flow.Chain,
	params ContractUpdaterParams,
	logger *ProgramLogger,
	systemContracts *SystemContracts,
	runtime *Runtime,
) *ContractUpdaterImpl

func NewContractUpdaterForTesting 

func NewContractUpdaterForTesting(
	accounts Accounts,
	stubs ContractUpdaterStubs,
) *ContractUpdaterImpl

func (*ContractUpdaterImpl) Commit added in v0.29.0 

func (updater *ContractUpdaterImpl) Commit() (ContractUpdates, error)

func (*ContractUpdaterImpl) HasUpdates added in v0.29.0 

func (updater *ContractUpdaterImpl) HasUpdates() bool

func (*ContractUpdaterImpl) RemoveAccountContractCode added in v0.29.0 

func (updater *ContractUpdaterImpl) RemoveAccountContractCode(
	location common.AddressLocation,
) error

func (*ContractUpdaterImpl) RemoveContract added in v0.29.0 

func (updater *ContractUpdaterImpl) RemoveContract(
	location common.AddressLocation,
	signingAccounts []flow.Address,
) (err error)

func (*ContractUpdaterImpl) Reset added in v0.29.0 

func (updater *ContractUpdaterImpl) Reset()

func (*ContractUpdaterImpl) SetContract added in v0.29.0 

func (updater *ContractUpdaterImpl) SetContract(
	location common.AddressLocation,
	code []byte,
	signingAccounts []flow.Address,
) error

func (*ContractUpdaterImpl) UpdateAccountContractCode added in v0.29.0 

func (updater *ContractUpdaterImpl) UpdateAccountContractCode(
	location common.AddressLocation,
	code []byte,
) error

type ContractUpdaterParams 

type ContractUpdaterParams struct {
	// Depricated: RestrictedDeploymentEnabled is deprecated use
	// SetIsContractDeploymentRestrictedTransaction instead.
	// Can be removed after all networks are migrated to
	// SetIsContractDeploymentRestrictedTransaction
	RestrictContractDeployment bool
	RestrictContractRemoval    bool
}

func DefaultContractUpdaterParams 

func DefaultContractUpdaterParams() ContractUpdaterParams

type ContractUpdaterStubs 

type ContractUpdaterStubs interface {
	RestrictedDeploymentEnabled() bool
	RestrictedRemovalEnabled() bool

	GetAuthorizedAccounts(path cadence.Path) []flow.Address
}

Expose stub interface for testing.

type ContractUpdates added in v0.30.0 

type ContractUpdates struct {
	Updates   []common.AddressLocation
	Deploys   []common.AddressLocation
	Deletions []common.AddressLocation
}

func (ContractUpdates) Any added in v0.30.0 

func (u ContractUpdates) Any() bool

type CryptoLibrary 

type CryptoLibrary interface {
	Hash(
		data []byte,
		tag string,
		hashAlgorithm runtime.HashAlgorithm,
	) (
		[]byte,
		error,
	)

	VerifySignature(
		signature []byte,
		tag string,
		signedData []byte,
		publicKey []byte,
		signatureAlgorithm runtime.SignatureAlgorithm,
		hashAlgorithm runtime.HashAlgorithm,
	) (
		bool,
		error,
	)

	ValidatePublicKey(pk *runtime.PublicKey) error

	BLSVerifyPOP(
		pk *runtime.PublicKey,
		sig []byte,
	) (
		bool,
		error,
	)

	BLSAggregateSignatures(sigs [][]byte) ([]byte, error)

	BLSAggregatePublicKeys(
		keys []*runtime.PublicKey,
	) (
		*runtime.PublicKey,
		error,
	)
}

func NewCryptoLibrary 

func NewCryptoLibrary(tracer tracing.TracerSpan, meter Meter) CryptoLibrary

func NewParseRestrictedCryptoLibrary added in v0.28.1 

func NewParseRestrictedCryptoLibrary(
	txnState state.NestedTransactionPreparer,
	impl CryptoLibrary,
) CryptoLibrary

type DerivedDataInvalidator added in v0.29.0 

type DerivedDataInvalidator struct {
	ContractUpdates

	MeterParamOverridesUpdated bool
}

func NewDerivedDataInvalidator added in v0.29.0 

func NewDerivedDataInvalidator(
	contractUpdates ContractUpdates,
	serviceAddress flow.Address,
	executionSnapshot *snapshot.ExecutionSnapshot,
) DerivedDataInvalidator

func (DerivedDataInvalidator) MeterParamOverridesInvalidator added in v0.29.0 

func (invalidator DerivedDataInvalidator) MeterParamOverridesInvalidator() derived.MeterParamOverridesInvalidator

func (DerivedDataInvalidator) ProgramInvalidator added in v0.29.0 

func (invalidator DerivedDataInvalidator) ProgramInvalidator() derived.ProgramInvalidator

type EntropyProvider added in v0.32.0 

type EntropyProvider interface {
	// RandomSource provides a source of entropy that can be
	// expanded into randoms (using a pseudo-random generator).
	// The returned slice should have at least 128 bits of entropy.
	// The function doesn't error in normal operations, any
	// error should be treated as an exception.
	RandomSource() ([]byte, error)
}

EntropyProvider represents an entropy (source of randomness) provider

type Environment 

type Environment interface {
	runtime.Interface

	// Tracer
	StartChildSpan(
		name trace.SpanName,
		options ...otelTrace.SpanStartOption,
	) tracing.TracerSpan

	Meter

	// Runtime
	BorrowCadenceRuntime() *reusableRuntime.ReusableCadenceRuntime
	ReturnCadenceRuntime(*reusableRuntime.ReusableCadenceRuntime)

	TransactionInfo

	// ProgramLogger
	Logger() zerolog.Logger
	Logs() []string

	// EventEmitter
	Events() flow.EventsList
	ServiceEvents() flow.EventsList
	ConvertedServiceEvents() flow.ServiceEventList

	// SystemContracts
	ContractFunctionInvoker

	AccountsStorageCapacity(
		addresses []flow.Address,
		payer flow.Address,
		maxTxFees uint64,
	) (
		cadence.Value,
		error,
	)
	CheckPayerBalanceAndGetMaxTxFees(
		payer flow.Address,
		inclusionEffort uint64,
		executionEffort uint64,
	) (
		cadence.Value,
		error,
	)
	DeductTransactionFees(
		payer flow.Address,
		inclusionEffort uint64,
		executionEffort uint64,
	) (
		cadence.Value,
		error,
	)

	// AccountInfo
	GetAccount(address flow.Address) (*flow.Account, error)

	// RandomSourceHistory is the current block's derived random source.
	// This source is only used by the core-contract that tracks the random source
	// history for commit-reveal schemes.
	RandomSourceHistory() ([]byte, error)

	// FlushPendingUpdates flushes pending updates from the stateful environment
	// modules (i.e., ContractUpdater) to the state transaction, and return
	// the updated contract keys.
	FlushPendingUpdates() (
		ContractUpdates,
		error,
	)

	// Reset resets all stateful environment modules (e.g., ContractUpdater,
	// EventEmitter) to initial state.
	Reset()
}

Environment implements the accounts business logic and exposes cadence runtime interface methods for the runtime.

type EnvironmentParams 

type EnvironmentParams struct {
	Chain flow.Chain

	// NOTE: The ServiceAccountEnabled option is used by the playground
	// https://github.com/onflow/flow-playground-api/blob/1ad967055f31db8f1ce88e008960e5fc14a9fbd1/compute/computer.go#L76
	ServiceAccountEnabled bool

	RuntimeParams

	ProgramLoggerParams

	EventEmitterParams

	BlockInfoParams
	TransactionInfoParams
	ScriptInfoParams

	EntropyProvider

	ContractUpdaterParams
}

func DefaultEnvironmentParams 

func DefaultEnvironmentParams() EnvironmentParams

func (*EnvironmentParams) SetScriptInfoParams added in v0.32.0 

func (env *EnvironmentParams) SetScriptInfoParams(info *ScriptInfoParams)

type EventCollection 

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

func NewEventCollection 

func NewEventCollection(meter Meter) *EventCollection

func (*EventCollection) AppendEvent 

func (collection *EventCollection) AppendEvent(event flow.Event, size uint64) error

func (*EventCollection) AppendServiceEvent 

func (collection *EventCollection) AppendServiceEvent(
	chain flow.Chain,
	event flow.Event,
	size uint64,
) error

func (*EventCollection) ConvertedServiceEvents added in v0.30.0 

func (collection *EventCollection) ConvertedServiceEvents() flow.ServiceEventList

func (*EventCollection) Events 

func (collection *EventCollection) Events() flow.EventsList

func (*EventCollection) ServiceEvents 

func (collection *EventCollection) ServiceEvents() flow.EventsList

func (*EventCollection) TotalByteSize 

func (collection *EventCollection) TotalByteSize() uint64

func (*EventCollection) TotalEventCounter 

func (collection *EventCollection) TotalEventCounter() uint32

type EventEmitter 

type EventEmitter interface {
	// EmitEvent satisfies Cadence's runtime API.
	// This will encode the cadence event
	//
	// Note that the script variant will return OperationNotSupportedError.
	EmitEvent(event cadence.Event) error

	Events() flow.EventsList
	ServiceEvents() flow.EventsList
	ConvertedServiceEvents() flow.ServiceEventList

	Reset()
}

EventEmitter collect events, separates out service events, and enforces event size limits.

Note that scripts do not emit events, but must expose the API in compliance with the runtime environment interface.

func NewEventEmitter 

func NewEventEmitter(
	tracer tracing.TracerSpan,
	meter Meter,
	chain flow.Chain,
	txInfo TransactionInfoParams,
	params EventEmitterParams,
) EventEmitter

NewEventEmitter constructs a new eventEmitter

func NewParseRestrictedEventEmitter added in v0.28.1 

func NewParseRestrictedEventEmitter(
	txnState state.NestedTransactionPreparer,
	impl EventEmitter,
) EventEmitter

type EventEmitterParams 

type EventEmitterParams struct {
	ServiceEventCollectionEnabled bool
	EventCollectionByteSizeLimit  uint64
	EventEncoder                  EventEncoder
}

func DefaultEventEmitterParams 

func DefaultEventEmitterParams() EventEmitterParams

type EventEncoder added in v0.29.0 

type EventEncoder interface {
	Encode(event cadence.Event) ([]byte, error)
}

type Meter 

type Meter interface {
	MeterComputation(common.ComputationKind, uint) error
	ComputationUsed() (uint64, error)
	ComputationIntensities() meter.MeteredComputationIntensities
	ComputationAvailable(common.ComputationKind, uint) bool

	MeterMemory(usage common.MemoryUsage) error
	MemoryUsed() (uint64, error)

	MeterEmittedEvent(byteSize uint64) error
	TotalEmittedEventBytes() uint64

	InteractionUsed() (uint64, error)
}

func NewCancellableMeter 

func NewCancellableMeter(
	ctx context.Context,
	txnState state.NestedTransactionPreparer,
) Meter

func NewMeter 

func NewMeter(txnState state.NestedTransactionPreparer) Meter

type MeterParamOverridesInvalidator added in v0.29.0 

type MeterParamOverridesInvalidator struct {
	DerivedDataInvalidator
}

func (MeterParamOverridesInvalidator) ShouldInvalidateEntries added in v0.29.0 

func (invalidator MeterParamOverridesInvalidator) ShouldInvalidateEntries() bool

func (MeterParamOverridesInvalidator) ShouldInvalidateEntry added in v0.29.0 

func (invalidator MeterParamOverridesInvalidator) ShouldInvalidateEntry(
	_ struct{},
	_ derived.MeterParamOverrides,
	_ *snapshot.ExecutionSnapshot,
) bool

type MetricsReporter 

type MetricsReporter interface {
	RuntimeTransactionParsed(time.Duration)
	RuntimeTransactionChecked(time.Duration)
	RuntimeTransactionInterpreted(time.Duration)
	RuntimeSetNumberOfAccounts(count uint64)
	RuntimeTransactionProgramsCacheMiss()
	RuntimeTransactionProgramsCacheHit()
}

MetricsReporter captures and reports metrics to back to the execution environment it is a setup passed to the context.

type NoAccountCreator 

type NoAccountCreator struct {
}

func (NoAccountCreator) CreateAccount 

func (NoAccountCreator) CreateAccount(
	runtimePayer common.Address,
) (
	common.Address,
	error,
)

type NoAccountKeyUpdater 

type NoAccountKeyUpdater struct{}

func (NoAccountKeyUpdater) AddAccountKey 

func (NoAccountKeyUpdater) AddAccountKey(
	runtimeAddress common.Address,
	publicKey *runtime.PublicKey,
	hashAlgo runtime.HashAlgorithm,
	weight int,
) (
	*runtime.AccountKey,
	error,
)

func (NoAccountKeyUpdater) RevokeAccountKey 

func (NoAccountKeyUpdater) RevokeAccountKey(
	runtimeAddress common.Address,
	keyIndex int,
) (
	*runtime.AccountKey,
	error,
)

type NoContractUpdater 

type NoContractUpdater struct{}

func (NoContractUpdater) Commit 

func (NoContractUpdater) Commit() (ContractUpdates, error)

func (NoContractUpdater) RemoveAccountContractCode 

func (NoContractUpdater) RemoveAccountContractCode(
	_ common.AddressLocation,
) error

func (NoContractUpdater) Reset 

func (NoContractUpdater) Reset()

func (NoContractUpdater) UpdateAccountContractCode 

func (NoContractUpdater) UpdateAccountContractCode(
	_ common.AddressLocation,
	_ []byte,
) error

type NoEventEmitter 

type NoEventEmitter struct{}

NoEventEmitter is usually used in the environment for script execution, where emitting an event does nothing.

func (NoEventEmitter) ConvertedServiceEvents added in v0.30.0 

func (NoEventEmitter) ConvertedServiceEvents() flow.ServiceEventList

func (NoEventEmitter) EmitEvent 

func (NoEventEmitter) EmitEvent(cadence.Event) error

func (NoEventEmitter) Events 

func (NoEventEmitter) Events() flow.EventsList

func (NoEventEmitter) Reset 

func (NoEventEmitter) Reset()

func (NoEventEmitter) ServiceEvents 

func (NoEventEmitter) ServiceEvents() flow.EventsList

type NoTransactionInfo 

type NoTransactionInfo struct {
}

Scripts have no associated transaction information.

func (NoTransactionInfo) GetSigningAccounts 

func (NoTransactionInfo) GetSigningAccounts() ([]common.Address, error)

func (NoTransactionInfo) IsServiceAccountAuthorizer 

func (NoTransactionInfo) IsServiceAccountAuthorizer() bool

func (NoTransactionInfo) LimitAccountStorage 

func (NoTransactionInfo) LimitAccountStorage() bool

func (NoTransactionInfo) TransactionFeesEnabled 

func (NoTransactionInfo) TransactionFeesEnabled() bool

func (NoTransactionInfo) TxID 

func (NoTransactionInfo) TxID() flow.Identifier

func (NoTransactionInfo) TxIndex 

func (NoTransactionInfo) TxIndex() uint32

type NoopBlockFinder 

type NoopBlockFinder struct{}

NoopBlockFinder implements the Blocks interface. It is used in the bootstrapping process.

func (NoopBlockFinder) ByHeightFrom 

func (NoopBlockFinder) ByHeightFrom(_ uint64, _ *flow.Header) (*flow.Header, error)

type NoopMetricsReporter 

type NoopMetricsReporter struct{}

NoopMetricsReporter is a MetricReporter that does nothing.

func (NoopMetricsReporter) RuntimeSetNumberOfAccounts 

func (NoopMetricsReporter) RuntimeSetNumberOfAccounts(count uint64)

RuntimeSetNumberOfAccounts is a noop

func (NoopMetricsReporter) RuntimeTransactionChecked 

func (NoopMetricsReporter) RuntimeTransactionChecked(time.Duration)

RuntimeTransactionChecked is a noop

func (NoopMetricsReporter) RuntimeTransactionInterpreted 

func (NoopMetricsReporter) RuntimeTransactionInterpreted(time.Duration)

RuntimeTransactionInterpreted is a noop

func (NoopMetricsReporter) RuntimeTransactionParsed 

func (NoopMetricsReporter) RuntimeTransactionParsed(time.Duration)

RuntimeTransactionParsed is a noop

func (NoopMetricsReporter) RuntimeTransactionProgramsCacheHit added in v0.29.17 

func (NoopMetricsReporter) RuntimeTransactionProgramsCacheHit()

RuntimeTransactionProgramsCacheHit is a noop

func (NoopMetricsReporter) RuntimeTransactionProgramsCacheMiss added in v0.29.17 

func (NoopMetricsReporter) RuntimeTransactionProgramsCacheMiss()

RuntimeTransactionProgramsCacheMiss is a noop

type ParseRestrictedAccountCreator 

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

This ensures cadence can't access unexpected operations while parsing programs.

func (ParseRestrictedAccountCreator) CreateAccount 

func (creator ParseRestrictedAccountCreator) CreateAccount(
	runtimePayer common.Address,
) (
	common.Address,
	error,
)

type ParseRestrictedAccountInfo 

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

func (ParseRestrictedAccountInfo) GetAccount 

func (info ParseRestrictedAccountInfo) GetAccount(
	address flow.Address,
) (
	*flow.Account,
	error,
)

func (ParseRestrictedAccountInfo) GetAccountAvailableBalance 

func (info ParseRestrictedAccountInfo) GetAccountAvailableBalance(
	runtimeAddress common.Address,
) (
	uint64,
	error,
)

func (ParseRestrictedAccountInfo) GetAccountBalance 

func (info ParseRestrictedAccountInfo) GetAccountBalance(
	runtimeAddress common.Address,
) (
	uint64,
	error,
)

func (ParseRestrictedAccountInfo) GetStorageCapacity 

func (info ParseRestrictedAccountInfo) GetStorageCapacity(
	runtimeAddress common.Address,
) (
	uint64,
	error,
)

func (ParseRestrictedAccountInfo) GetStorageUsed 

func (info ParseRestrictedAccountInfo) GetStorageUsed(
	runtimeAddress common.Address,
) (
	uint64,
	error,
)

type ParseRestrictedAccountKeyReader added in v0.28.1 

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

func (ParseRestrictedAccountKeyReader) AccountKeysCount added in v0.29.0 

func (reader ParseRestrictedAccountKeyReader) AccountKeysCount(
	runtimeAddress common.Address,
) (
	uint64,
	error,
)

func (ParseRestrictedAccountKeyReader) GetAccountKey added in v0.28.1 

func (reader ParseRestrictedAccountKeyReader) GetAccountKey(
	runtimeAddress common.Address,
	keyIndex int,
) (
	*runtime.AccountKey,
	error,
)

type ParseRestrictedAccountKeyUpdater 

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

func NewParseRestrictedAccountKeyUpdater 

func NewParseRestrictedAccountKeyUpdater(
	txnState state.NestedTransactionPreparer,
	impl AccountKeyUpdater,
) ParseRestrictedAccountKeyUpdater

func (ParseRestrictedAccountKeyUpdater) AddAccountKey 

func (updater ParseRestrictedAccountKeyUpdater) AddAccountKey(
	runtimeAddress common.Address,
	publicKey *runtime.PublicKey,
	hashAlgo runtime.HashAlgorithm,
	weight int,
) (
	*runtime.AccountKey,
	error,
)

func (ParseRestrictedAccountKeyUpdater) RevokeAccountKey 

func (updater ParseRestrictedAccountKeyUpdater) RevokeAccountKey(
	runtimeAddress common.Address,
	keyIndex int,
) (
	*runtime.AccountKey,
	error,
)

type ParseRestrictedAccountLocalIDGenerator added in v0.31.0 

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

func (ParseRestrictedAccountLocalIDGenerator) GenerateAccountID added in v0.31.0 

func (generator ParseRestrictedAccountLocalIDGenerator) GenerateAccountID(
	address common.Address,
) (uint64, error)

type ParseRestrictedBlockInfo added in v0.28.1 

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

func (ParseRestrictedBlockInfo) GetBlockAtHeight added in v0.28.1 

func (info ParseRestrictedBlockInfo) GetBlockAtHeight(
	height uint64,
) (
	runtime.Block,
	bool,
	error,
)

func (ParseRestrictedBlockInfo) GetCurrentBlockHeight added in v0.28.1 

func (info ParseRestrictedBlockInfo) GetCurrentBlockHeight() (uint64, error)

type ParseRestrictedContractUpdater 

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

func NewParseRestrictedContractUpdater 

func NewParseRestrictedContractUpdater(
	txnState state.NestedTransactionPreparer,
	impl ContractUpdater,
) ParseRestrictedContractUpdater

func (ParseRestrictedContractUpdater) Commit 

func (updater ParseRestrictedContractUpdater) Commit() (
	ContractUpdates,
	error,
)

func (ParseRestrictedContractUpdater) RemoveAccountContractCode 

func (updater ParseRestrictedContractUpdater) RemoveAccountContractCode(
	location common.AddressLocation,
) error

func (ParseRestrictedContractUpdater) Reset 

func (updater ParseRestrictedContractUpdater) Reset()

func (ParseRestrictedContractUpdater) UpdateAccountContractCode 

func (updater ParseRestrictedContractUpdater) UpdateAccountContractCode(
	location common.AddressLocation,
	code []byte,
) error

type ParseRestrictedCryptoLibrary added in v0.28.1 

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

func (ParseRestrictedCryptoLibrary) BLSAggregatePublicKeys added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) BLSAggregatePublicKeys(
	keys []*runtime.PublicKey,
) (
	*runtime.PublicKey,
	error,
)

func (ParseRestrictedCryptoLibrary) BLSAggregateSignatures added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) BLSAggregateSignatures(
	sigs [][]byte,
) (
	[]byte,
	error,
)

func (ParseRestrictedCryptoLibrary) BLSVerifyPOP added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) BLSVerifyPOP(
	pk *runtime.PublicKey,
	sig []byte,
) (
	bool,
	error,
)

func (ParseRestrictedCryptoLibrary) Hash added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) Hash(
	data []byte,
	tag string,
	hashAlgorithm runtime.HashAlgorithm,
) (
	[]byte,
	error,
)

func (ParseRestrictedCryptoLibrary) ValidatePublicKey added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) ValidatePublicKey(
	pk *runtime.PublicKey,
) error

func (ParseRestrictedCryptoLibrary) VerifySignature added in v0.28.1 

func (lib ParseRestrictedCryptoLibrary) VerifySignature(
	signature []byte,
	tag string,
	signedData []byte,
	publicKey []byte,
	signatureAlgorithm runtime.SignatureAlgorithm,
	hashAlgorithm runtime.HashAlgorithm,
) (
	bool,
	error,
)

type ParseRestrictedEventEmitter added in v0.28.1 

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

func (ParseRestrictedEventEmitter) ConvertedServiceEvents added in v0.30.0 

func (emitter ParseRestrictedEventEmitter) ConvertedServiceEvents() flow.ServiceEventList

func (ParseRestrictedEventEmitter) EmitEvent added in v0.28.1 

func (emitter ParseRestrictedEventEmitter) EmitEvent(event cadence.Event) error

func (ParseRestrictedEventEmitter) Events added in v0.28.1 

func (emitter ParseRestrictedEventEmitter) Events() flow.EventsList

func (ParseRestrictedEventEmitter) Reset added in v0.28.1 

func (emitter ParseRestrictedEventEmitter) Reset()

func (ParseRestrictedEventEmitter) ServiceEvents added in v0.28.1 

func (emitter ParseRestrictedEventEmitter) ServiceEvents() flow.EventsList

type ParseRestrictedRandomGenerator added in v0.32.0 

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

func (ParseRestrictedRandomGenerator) ReadRandom added in v0.32.0 

func (gen ParseRestrictedRandomGenerator) ReadRandom(buf []byte) error

type ParseRestrictedRandomSourceHistoryProvider added in v0.32.2 

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

func (ParseRestrictedRandomSourceHistoryProvider) RandomSourceHistory added in v0.32.2 

func (p ParseRestrictedRandomSourceHistoryProvider) RandomSourceHistory() ([]byte, error)

type ParseRestrictedTransactionInfo 

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

func (ParseRestrictedTransactionInfo) GetSigningAccounts 

func (info ParseRestrictedTransactionInfo) GetSigningAccounts() (
	[]common.Address,
	error,
)

func (ParseRestrictedTransactionInfo) IsServiceAccountAuthorizer 

func (info ParseRestrictedTransactionInfo) IsServiceAccountAuthorizer() bool

func (ParseRestrictedTransactionInfo) LimitAccountStorage 

func (info ParseRestrictedTransactionInfo) LimitAccountStorage() bool

func (ParseRestrictedTransactionInfo) TransactionFeesEnabled 

func (info ParseRestrictedTransactionInfo) TransactionFeesEnabled() bool

func (ParseRestrictedTransactionInfo) TxID 

func (info ParseRestrictedTransactionInfo) TxID() flow.Identifier

func (ParseRestrictedTransactionInfo) TxIndex 

func (info ParseRestrictedTransactionInfo) TxIndex() uint32

type ParseRestrictedUUIDGenerator added in v0.28.1 

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

func (ParseRestrictedUUIDGenerator) GenerateUUID added in v0.28.1 

func (generator ParseRestrictedUUIDGenerator) GenerateUUID() (uint64, error)

type ParseRestrictedValueStore added in v0.28.1 

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

func (ParseRestrictedValueStore) AllocateStorageIndex added in v0.28.1 

func (store ParseRestrictedValueStore) AllocateStorageIndex(
	owner []byte,
) (
	atree.StorageIndex,
	error,
)

func (ParseRestrictedValueStore) GetValue added in v0.28.1 

func (store ParseRestrictedValueStore) GetValue(
	owner []byte,
	key []byte,
) (
	[]byte,
	error,
)

func (ParseRestrictedValueStore) SetValue added in v0.28.1 

func (store ParseRestrictedValueStore) SetValue(
	owner []byte,
	key []byte,
	value []byte,
) error

func (ParseRestrictedValueStore) ValueExists added in v0.28.1 

func (store ParseRestrictedValueStore) ValueExists(
	owner []byte,
	key []byte,
) (
	bool,
	error,
)

type ProgramInvalidator added in v0.29.0 

type ProgramInvalidator struct {
	DerivedDataInvalidator
}

func (ProgramInvalidator) ShouldInvalidateEntries added in v0.29.0 

func (invalidator ProgramInvalidator) ShouldInvalidateEntries() bool

func (ProgramInvalidator) ShouldInvalidateEntry added in v0.29.0 

func (invalidator ProgramInvalidator) ShouldInvalidateEntry(
	location common.AddressLocation,
	program *derived.Program,
	snapshot *snapshot.ExecutionSnapshot,
) bool

type ProgramLoadingError added in v0.33.30 

type ProgramLoadingError struct {
	Err      error
	Location common.Location
}

func (ProgramLoadingError) Error added in v0.33.30 

func (p ProgramLoadingError) Error() string

func (ProgramLoadingError) Unwrap added in v0.33.30 

func (p ProgramLoadingError) Unwrap() error

type ProgramLogger 

type ProgramLogger struct {
	ProgramLoggerParams
	// contains filtered or unexported fields
}

func NewProgramLogger 

func NewProgramLogger(
	tracer tracing.TracerSpan,
	params ProgramLoggerParams,
) *ProgramLogger

func (*ProgramLogger) ImplementationDebugLog 

func (logger *ProgramLogger) ImplementationDebugLog(message string) error

func (*ProgramLogger) Logger 

func (logger *ProgramLogger) Logger() zerolog.Logger

func (*ProgramLogger) Logs 

func (logger *ProgramLogger) Logs() []string

func (*ProgramLogger) ProgramChecked 

func (logger *ProgramLogger) ProgramChecked(
	location common.Location,
	duration time.Duration,
)

ProgramChecked captures time spent on checking a code at specific location

func (*ProgramLogger) ProgramInterpreted 

func (logger *ProgramLogger) ProgramInterpreted(
	location common.Location,
	duration time.Duration,
)

ProgramInterpreted captures time spent on interpreting a code at specific location

func (*ProgramLogger) ProgramLog 

func (logger *ProgramLogger) ProgramLog(message string) error

func (*ProgramLogger) ProgramParsed 

func (logger *ProgramLogger) ProgramParsed(
	location common.Location,
	duration time.Duration,
)

ProgramParsed captures time spent on parsing a code at specific location

func (*ProgramLogger) RecordTrace 

func (logger *ProgramLogger) RecordTrace(
	operation string,
	location common.Location,
	duration time.Duration,
	attrs []attribute.KeyValue,
)

func (*ProgramLogger) ValueDecoded 

func (logger *ProgramLogger) ValueDecoded(duration time.Duration)

ValueDecoded accumulates time spend on runtime value decoding

func (*ProgramLogger) ValueEncoded 

func (logger *ProgramLogger) ValueEncoded(duration time.Duration)

ValueEncoded accumulates time spend on runtime value encoding

type ProgramLoggerParams 

type ProgramLoggerParams struct {
	zerolog.Logger

	CadenceLoggingEnabled bool

	MetricsReporter
}

func DefaultProgramLoggerParams 

func DefaultProgramLoggerParams() ProgramLoggerParams

type Programs 

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

Programs manages operations around cadence program parsing.

Note that cadence guarantees that Get/Set methods are called in a LIFO manner. Hence, we create new nested transactions on Get calls and commit these nested transactions on Set calls in order to capture the states needed for parsing the programs.

func NewPrograms 

func NewPrograms(
	tracer tracing.TracerSpan,
	meter Meter,
	metrics MetricsReporter,
	txnState storage.TransactionPreparer,
	accounts Accounts,
) *Programs

NewPrograms constructs a new ProgramHandler

func (*Programs) DecodeArgument 

func (programs *Programs) DecodeArgument(
	bytes []byte,
	_ cadence.Type,
) (
	cadence.Value,
	error,
)

func (*Programs) GetOrLoadProgram added in v0.30.0 

func (programs *Programs) GetOrLoadProgram(
	location common.Location,
	load func() (*interpreter.Program, error),
) (*interpreter.Program, error)

GetOrLoadProgram gets the program from the cache, or loads it (by calling load) if it is not in the cache. When loading a program, this method will be re-entered to load the dependencies of the program.

func (*Programs) Reset added in v0.30.0 

func (programs *Programs) Reset()

Reset resets the program cache. this is called if the transactions happy path fails.

type RandomGenerator added in v0.32.0 

type RandomGenerator interface {
	// ReadRandom reads pseudo-random bytes into the input slice, using distributed randomness.
	// The name follows Cadence interface
	ReadRandom([]byte) error
}

func NewParseRestrictedRandomGenerator added in v0.32.0 

func NewParseRestrictedRandomGenerator(
	txnState state.NestedTransactionPreparer,
	impl RandomGenerator,
) RandomGenerator

func NewRandomGenerator added in v0.32.0 

func NewRandomGenerator(
	tracer tracing.TracerSpan,
	entropySource EntropyProvider,
	salt []byte,
) RandomGenerator

type RandomSourceHistoryProvider added in v0.32.2 

type RandomSourceHistoryProvider interface {
	// RandomSourceHistory provides a source of entropy that can be
	// expanded on-chain into randoms (using a pseudo-random generator).
	// This random source is only destined to the history source core-contract
	// to implement commit-reveal schemes.
	// The returned slice should have at least 128 bits of entropy.
	// The function doesn't error in normal operations, any
	// error should be treated as an exception.
	RandomSourceHistory() ([]byte, error)
}

func NewForbiddenRandomSourceHistoryProvider added in v0.32.2 

func NewForbiddenRandomSourceHistoryProvider() RandomSourceHistoryProvider

func NewParseRestrictedRandomSourceHistoryProvider added in v0.32.2 

func NewParseRestrictedRandomSourceHistoryProvider(
	txnState state.NestedTransactionPreparer,
	impl RandomSourceHistoryProvider,
) RandomSourceHistoryProvider

func NewRandomSourceHistoryProvider added in v0.32.2 

func NewRandomSourceHistoryProvider(
	tracer tracing.TracerSpan,
	meter Meter,
	entropyProvider EntropyProvider,
	randomSourceCallAllowed bool,
) RandomSourceHistoryProvider

NewRandomSourceHistoryProvider creates a new RandomSourceHistoryProvider. If randomSourceCallAllowed is true, the returned RandomSourceHistoryProvider will return a random source from the given EntropyProvider. If randomSourceCallAllowed is false, the returned RandomSourceHistoryProvider will always return an error.

type Runtime 

type Runtime struct {
	RuntimeParams
	// contains filtered or unexported fields
}

Runtime expose the cadence runtime to the rest of the envionment package.

func NewRuntime 

func NewRuntime(params RuntimeParams) *Runtime

func (*Runtime) BorrowCadenceRuntime 

func (runtime *Runtime) BorrowCadenceRuntime() *runtime.ReusableCadenceRuntime

func (*Runtime) ReturnCadenceRuntime 

func (runtime *Runtime) ReturnCadenceRuntime(
	reusable *runtime.ReusableCadenceRuntime,
)

func (*Runtime) SetEnvironment 

func (runtime *Runtime) SetEnvironment(env Environment)

type RuntimeParams 

type RuntimeParams struct {
	runtime.ReusableCadenceRuntimePool
}

func DefaultRuntimeParams 

func DefaultRuntimeParams() RuntimeParams

type ScriptInfoParams added in v0.32.0 

type ScriptInfoParams struct {
	ID        flow.Identifier
	Script    []byte
	Arguments [][]byte
}

func NewScriptInfoParams added in v0.32.0 

func NewScriptInfoParams(code []byte, arguments [][]byte) *ScriptInfoParams

func (ScriptInfoParams) Fingerprint added in v0.32.0 

func (info ScriptInfoParams) Fingerprint() []byte

type StatefulAccounts 

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

func NewAccounts 

func NewAccounts(txnState state.NestedTransactionPreparer) *StatefulAccounts

func (*StatefulAccounts) AllocateStorageIndex 

func (a *StatefulAccounts) AllocateStorageIndex(
	address flow.Address,
) (
	atree.StorageIndex,
	error,
)

func (*StatefulAccounts) AppendPublicKey 

func (a *StatefulAccounts) AppendPublicKey(
	address flow.Address,
	publicKey flow.AccountPublicKey,
) error

func (*StatefulAccounts) ContractExists 

func (a *StatefulAccounts) ContractExists(
	contractName string,
	address flow.Address,
) (
	bool,
	error,
)

func (*StatefulAccounts) Create 

func (a *StatefulAccounts) Create(
	publicKeys []flow.AccountPublicKey,
	newAddress flow.Address,
) error

Create account sets all required registers on an address.

func (*StatefulAccounts) DeleteContract 

func (a *StatefulAccounts) DeleteContract(
	contractName string,
	address flow.Address,
) error

func (*StatefulAccounts) Exists 

func (a *StatefulAccounts) Exists(address flow.Address) (bool, error)

func (*StatefulAccounts) GenerateAccountLocalID added in v0.31.0 

func (a *StatefulAccounts) GenerateAccountLocalID(
	address flow.Address,
) (
	uint64,
	error,
)

GenerateAccountLocalID generates a new account local id for an address it is sequential and starts at 1 Errors can happen if the account state cannot be read or written to

func (*StatefulAccounts) Get 

func (a *StatefulAccounts) Get(address flow.Address) (*flow.Account, error)

func (*StatefulAccounts) GetContract 

func (a *StatefulAccounts) GetContract(
	contractName string,
	address flow.Address,
) (
	[]byte,
	error,
)

func (*StatefulAccounts) GetContractNames 

func (a *StatefulAccounts) GetContractNames(
	address flow.Address,
) (
	[]string,
	error,
)

GetContractNames gets a sorted list of names of contracts deployed on an address

func (*StatefulAccounts) GetPublicKey 

func (a *StatefulAccounts) GetPublicKey(
	address flow.Address,
	keyIndex uint64,
) (
	flow.AccountPublicKey,
	error,
)

func (*StatefulAccounts) GetPublicKeyCount 

func (a *StatefulAccounts) GetPublicKeyCount(
	address flow.Address,
) (
	uint64,
	error,
)

func (*StatefulAccounts) GetPublicKeys 

func (a *StatefulAccounts) GetPublicKeys(
	address flow.Address,
) (
	publicKeys []flow.AccountPublicKey,
	err error,
)

func (*StatefulAccounts) GetStorageUsed 

func (a *StatefulAccounts) GetStorageUsed(
	address flow.Address,
) (
	uint64,
	error,
)

GetStorageUsed returns the amount of storage used in bytes by this account

func (*StatefulAccounts) GetValue 

func (a *StatefulAccounts) GetValue(
	id flow.RegisterID,
) (
	flow.RegisterValue,
	error,
)

func (*StatefulAccounts) SetAllPublicKeys 

func (a *StatefulAccounts) SetAllPublicKeys(
	address flow.Address,
	publicKeys []flow.AccountPublicKey,
) error

func (*StatefulAccounts) SetContract 

func (a *StatefulAccounts) SetContract(
	contractName string,
	address flow.Address,
	contract []byte,
) error

func (*StatefulAccounts) SetPublicKey 

func (a *StatefulAccounts) SetPublicKey(
	address flow.Address,
	keyIndex uint64,
	publicKey flow.AccountPublicKey,
) (encodedPublicKey []byte, err error)

func (*StatefulAccounts) SetValue 

func (a *StatefulAccounts) SetValue(
	id flow.RegisterID,
	value flow.RegisterValue,
) error

SetValue sets a value in address' storage

type SystemContracts 

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

SystemContracts provides methods for invoking system contract functions as service account.

func NewSystemContracts 

func NewSystemContracts(
	chain flow.Chain,
	tracer tracing.TracerSpan,
	logger *ProgramLogger,
	runtime *Runtime,
) *SystemContracts

func (*SystemContracts) AccountAvailableBalance 

func (sys *SystemContracts) AccountAvailableBalance(
	address flow.Address,
) (cadence.Value, error)

AccountAvailableBalance executes the get available balance contract on the storage fees contract.

func (*SystemContracts) AccountBalance 

func (sys *SystemContracts) AccountBalance(
	address flow.Address,
) (cadence.Value, error)

AccountBalance executes the get available balance contract on the service account.

func (*SystemContracts) AccountStorageCapacity 

func (sys *SystemContracts) AccountStorageCapacity(
	address flow.Address,
) (cadence.Value, error)

AccountStorageCapacity executes the get storage capacity contract on the service account.

func (*SystemContracts) AccountsStorageCapacity 

func (sys *SystemContracts) AccountsStorageCapacity(
	addresses []flow.Address,
	payer flow.Address,
	maxTxFees uint64,
) (cadence.Value, error)

AccountsStorageCapacity gets storage capacity for multiple accounts at once.

func (*SystemContracts) CheckPayerBalanceAndGetMaxTxFees added in v0.29.0 

func (sys *SystemContracts) CheckPayerBalanceAndGetMaxTxFees(
	payer flow.Address,
	inclusionEffort uint64,
	maxExecutionEffort uint64,
) (cadence.Value, error)

CheckPayerBalanceAndGetMaxTxFees executes the verifyPayersBalanceForTransactionExecution on the FlowFees account. It checks whether the given payer has enough balance to cover inclusion fee and max execution fee. It returns (maxTransactionFee, ErrCodeInsufficientPayerBalance) if the payer doesn't have enough balance It returns (maxTransactionFee, nil) if the payer has enough balance

func (*SystemContracts) DeductTransactionFees 

func (sys *SystemContracts) DeductTransactionFees(
	payer flow.Address,
	inclusionEffort uint64,
	executionEffort uint64,
) (cadence.Value, error)

DeductTransactionFees executes the fee deduction function on the FlowFees account.

func (*SystemContracts) Invoke 

func (sys *SystemContracts) Invoke(
	spec ContractFunctionSpec,
	arguments []cadence.Value,
) (
	cadence.Value,
	error,
)

func (*SystemContracts) SetupNewAccount 

func (sys *SystemContracts) SetupNewAccount(
	flowAddress flow.Address,
	payer flow.Address,
) (cadence.Value, error)

SetupNewAccount executes the new account setup contract on the service account.

type TransactionInfo 

type TransactionInfo interface {
	TxIndex() uint32
	TxID() flow.Identifier

	TransactionFeesEnabled() bool
	LimitAccountStorage() bool

	IsServiceAccountAuthorizer() bool

	// Cadence's runtime API.  Note that the script variant will return
	// OperationNotSupportedError.
	GetSigningAccounts() ([]common.Address, error)
}

TransactionInfo exposes information associated with the executing transaction.

Note that scripts have no associated transaction information, but must expose the API in compliance with the runtime environment interface.

func NewParseRestrictedTransactionInfo 

func NewParseRestrictedTransactionInfo(
	txnState state.NestedTransactionPreparer,
	impl TransactionInfo,
) TransactionInfo

func NewTransactionInfo 

func NewTransactionInfo(
	params TransactionInfoParams,
	tracer tracing.TracerSpan,
	serviceAccount flow.Address,
) TransactionInfo

type TransactionInfoParams 

type TransactionInfoParams struct {
	TxIndex uint32
	TxId    flow.Identifier
	TxBody  *flow.TransactionBody

	TransactionFeesEnabled bool
	LimitAccountStorage    bool
	// RandomSourceHistoryCallAllowed is true if the transaction is allowed to call the `entropy`
	// cadence function to get the entropy of that block.
	RandomSourceHistoryCallAllowed bool
}

func DefaultTransactionInfoParams 

func DefaultTransactionInfoParams() TransactionInfoParams

type UUIDGenerator 

type UUIDGenerator interface {
	GenerateUUID() (uint64, error)
}

func NewParseRestrictedUUIDGenerator added in v0.28.1 

func NewParseRestrictedUUIDGenerator(
	txnState state.NestedTransactionPreparer,
	impl UUIDGenerator,
) UUIDGenerator

type ValueStore 

type ValueStore interface {
	GetValue(owner []byte, key []byte) ([]byte, error)

	SetValue(owner, key, value []byte) error

	ValueExists(owner []byte, key []byte) (bool, error)

	AllocateStorageIndex(owner []byte) (atree.StorageIndex, error)
}

ValueStore provides read/write access to the account storage.

func NewParseRestrictedValueStore added in v0.28.1 

func NewParseRestrictedValueStore(
	txnState state.NestedTransactionPreparer,
	impl ValueStore,
) ValueStore

func NewValueStore 

func NewValueStore(
	tracer tracing.TracerSpan,
	meter Meter,
	accounts Accounts,
) ValueStore

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