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transactionEnv.go
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transactionEnv.go
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package fvm
import (
"encoding/binary"
"encoding/hex"
"fmt"
"math/rand"
"time"
"github.com/onflow/cadence"
jsoncdc "github.com/onflow/cadence/encoding/json"
"github.com/onflow/cadence/runtime"
"github.com/onflow/cadence/runtime/ast"
"github.com/onflow/cadence/runtime/common"
"github.com/onflow/cadence/runtime/interpreter"
"github.com/onflow/cadence/runtime/sema"
"github.com/opentracing/opentracing-go"
traceLog "github.com/opentracing/opentracing-go/log"
"github.com/onflow/flow-go/fvm/blueprints"
"github.com/onflow/flow-go/fvm/crypto"
"github.com/onflow/flow-go/fvm/errors"
"github.com/onflow/flow-go/fvm/handler"
"github.com/onflow/flow-go/fvm/programs"
"github.com/onflow/flow-go/fvm/state"
"github.com/onflow/flow-go/fvm/utils"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module/trace"
"github.com/onflow/flow-go/storage"
)
var _ runtime.Interface = &TransactionEnv{}
// TransactionEnv is a read-write environment used for executing flow transactions.
type TransactionEnv struct {
vm *VirtualMachine
ctx Context
sth *state.StateHolder
programs *handler.ProgramsHandler
accounts *state.Accounts
uuidGenerator *state.UUIDGenerator
contracts *handler.ContractHandler
accountKeys *handler.AccountKeyHandler
metrics *handler.MetricsHandler
eventHandler *handler.EventHandler
addressGenerator flow.AddressGenerator
rng *rand.Rand
logs []string
totalGasUsed uint64
tx *flow.TransactionBody
txIndex uint32
txID flow.Identifier
traceSpan opentracing.Span
authorizers []runtime.Address
}
func NewTransactionEnvironment(
ctx Context,
vm *VirtualMachine,
sth *state.StateHolder,
programs *programs.Programs,
tx *flow.TransactionBody,
txIndex uint32,
traceSpan opentracing.Span,
) *TransactionEnv {
accounts := state.NewAccounts(sth)
generator := state.NewStateBoundAddressGenerator(sth, ctx.Chain)
uuidGenerator := state.NewUUIDGenerator(sth)
programsHandler := handler.NewProgramsHandler(programs, sth)
// TODO set the flags on context
eventHandler := handler.NewEventHandler(ctx.Chain,
ctx.EventCollectionEnabled,
ctx.ServiceEventCollectionEnabled,
ctx.EventCollectionByteSizeLimit,
)
accountKeys := handler.NewAccountKeyHandler(accounts)
metrics := handler.NewMetricsHandler(ctx.Metrics)
env := &TransactionEnv{
vm: vm,
ctx: ctx,
sth: sth,
metrics: metrics,
programs: programsHandler,
accounts: accounts,
accountKeys: accountKeys,
addressGenerator: generator,
uuidGenerator: uuidGenerator,
eventHandler: eventHandler,
tx: tx,
txIndex: txIndex,
txID: tx.ID(),
traceSpan: traceSpan,
}
env.contracts = handler.NewContractHandler(accounts,
ctx.RestrictedDeploymentEnabled,
env.GetAuthorizedAccountsForContractUpdates,
)
if ctx.BlockHeader != nil {
env.seedRNG(ctx.BlockHeader)
}
return env
}
func (e *TransactionEnv) TxIndex() uint32 {
return e.txIndex
}
func (e *TransactionEnv) TxID() flow.Identifier {
return e.txID
}
func (e *TransactionEnv) Context() *Context {
return &e.ctx
}
func (e *TransactionEnv) VM() *VirtualMachine {
return e.vm
}
func (e *TransactionEnv) seedRNG(header *flow.Header) {
// Seed the random number generator with entropy created from the block header ID. The random number generator will
// be used by the UnsafeRandom function.
id := header.ID()
source := rand.NewSource(int64(binary.BigEndian.Uint64(id[:])))
e.rng = rand.New(source)
}
func (e *TransactionEnv) isTraceable() bool {
return e.ctx.Tracer != nil && e.traceSpan != nil
}
// GetAuthorizedAccountsForContractUpdates returns a list of addresses that
// are authorized to update/deploy contracts
//
// It reads a storage path from service account and parse the addresses.
// if any issue occurs on the process (missing registers, stored value properly not set)
// it gracefully handle it and falls back to default behaviour (only service account be authorized)
func (e *TransactionEnv) GetAuthorizedAccountsForContractUpdates() []common.Address {
// set default to service account only
service := runtime.Address(e.ctx.Chain.ServiceAddress())
defaultAccounts := []runtime.Address{service}
value, err := e.vm.Runtime.ReadStored(
service,
cadence.Path{
Domain: blueprints.ContractDeploymentAuthorizedAddressesPathDomain,
Identifier: blueprints.ContractDeploymentAuthorizedAddressesPathIdentifier,
},
runtime.Context{Interface: e},
)
if err != nil {
e.ctx.Logger.Warn().Msg("failed to read contract deployment authrozied accounts from service account. using default behaviour instead.")
return defaultAccounts
}
adresses, ok := utils.OptionalCadenceValueToAddressSlice(value)
if !ok {
e.ctx.Logger.Warn().Msg("failed to parse contract deployment authrozied accounts from service account. using default behaviour instead.")
return defaultAccounts
}
return adresses
}
func (e *TransactionEnv) isAuthorizerServiceAccount() bool {
return e.isAuthorizer(runtime.Address(e.ctx.Chain.ServiceAddress()))
}
func (e *TransactionEnv) isAuthorizer(address runtime.Address) bool {
for _, accountAddress := range e.getSigningAccounts() {
if accountAddress == address {
return true
}
}
return false
}
func (e *TransactionEnv) GetValue(owner, key []byte) ([]byte, error) {
var valueByteSize int
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetValue)
defer func() {
sp.LogFields(
traceLog.String("owner", hex.EncodeToString(owner)),
traceLog.String("key", string(key)),
traceLog.Int("valueByteSize", valueByteSize),
)
sp.Finish()
}()
}
v, err := e.accounts.GetValue(
flow.BytesToAddress(owner),
string(key),
)
if err != nil {
return nil, fmt.Errorf("getting value failed: %w", err)
}
valueByteSize = len(v)
return v, nil
}
func (e *TransactionEnv) SetValue(owner, key, value []byte) error {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvSetValue)
sp.LogFields(
traceLog.String("owner", hex.EncodeToString(owner)),
traceLog.String("key", string(key)),
)
defer sp.Finish()
}
err := e.accounts.SetValue(
flow.BytesToAddress(owner),
string(key),
value,
)
if err != nil {
return fmt.Errorf("setting value failed: %w", err)
}
return nil
}
func (e *TransactionEnv) ValueExists(owner, key []byte) (exists bool, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvValueExists)
defer sp.Finish()
}
v, err := e.GetValue(owner, key)
if err != nil {
return false, fmt.Errorf("checking value existence failed: %w", err)
}
return len(v) > 0, nil
}
func (e *TransactionEnv) GetStorageUsed(address common.Address) (value uint64, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetStorageUsed)
defer sp.Finish()
}
value, err = e.accounts.GetStorageUsed(flow.BytesToAddress(address.Bytes()))
if err != nil {
return value, fmt.Errorf("getting storage used failed: %w", err)
}
return value, nil
}
func (e *TransactionEnv) GetStorageCapacity(address common.Address) (value uint64, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetStorageCapacity)
defer sp.Finish()
}
script := Script(blueprints.GetStorageCapacityScript(flow.BytesToAddress(address.Bytes()), e.ctx.Chain.ServiceAddress()))
// TODO (ramtin) this shouldn't be this way, it should call the invokeMeta
// and we handle the errors and still compute the state interactions
err = e.vm.Run(
e.ctx,
script,
e.sth.State().View(),
e.programs.Programs,
)
if err != nil {
return 0, err
}
var capacity uint64
// TODO: Figure out how to handle this error. Currently if a runtime error occurs, storage capacity will be 0.
// 1. An error will occur if user has removed their FlowToken.Vault -- should this be allowed?
// 2. There will also be an error in case the accounts balance times megabytesPerFlow constant overflows,
// which shouldn't happen unless the the price of storage is reduced at least 100 fold
// 3. Any other error indicates a bug in our implementation. How can we reliably check the Cadence error?
if script.Err == nil {
// Return type is actually a UFix64 with the unit of megabytes so some conversion is necessary
// divide the unsigned int by (1e8 (the scale of Fix64) / 1e6 (for mega)) to get bytes (rounded down)
capacity = script.Value.ToGoValue().(uint64) / 100
}
return capacity, nil
}
func (e *TransactionEnv) GetAccountBalance(address common.Address) (value uint64, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetAccountBalance)
defer sp.Finish()
}
script := Script(blueprints.GetFlowTokenBalanceScript(flow.BytesToAddress(address.Bytes()), e.ctx.Chain.ServiceAddress()))
// TODO similar to the one above
err = e.vm.Run(
e.ctx,
script,
e.sth.State().View(),
e.programs.Programs,
)
if err != nil {
return 0, err
}
var balance uint64
// TODO: Figure out how to handle this error. Currently if a runtime error occurs, balance will be 0.
if script.Err == nil {
balance = script.Value.ToGoValue().(uint64)
}
return balance, nil
}
func (e *TransactionEnv) GetAccountAvailableBalance(address common.Address) (value uint64, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetAccountBalance)
defer sp.Finish()
}
script := Script(blueprints.GetFlowTokenAvailableBalanceScript(flow.BytesToAddress(address.Bytes()), e.ctx.Chain.ServiceAddress()))
// TODO similar to the one above
err = e.vm.Run(
e.ctx,
script,
e.sth.State().View(),
e.programs.Programs,
)
if err != nil {
return 0, err
}
var balance uint64
// TODO: Figure out how to handle this error. Currently if a runtime error occurs, available balance will be 0.
// 1. An error will occur if user has removed their FlowToken.Vault -- should this be allowed?
// 2. Any other error indicates a bug in our implementation. How can we reliably check the Cadence error?
if script.Err == nil {
balance = script.Value.ToGoValue().(uint64)
}
return balance, nil
}
func (e *TransactionEnv) ResolveLocation(
identifiers []runtime.Identifier,
location runtime.Location,
) ([]runtime.ResolvedLocation, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvResolveLocation)
defer sp.Finish()
}
addressLocation, isAddress := location.(common.AddressLocation)
// if the location is not an address location, e.g. an identifier location (`import Crypto`),
// then return a single resolved location which declares all identifiers.
if !isAddress {
return []runtime.ResolvedLocation{
{
Location: location,
Identifiers: identifiers,
},
}, nil
}
// if the location is an address,
// and no specific identifiers where requested in the import statement,
// then fetch all identifiers at this address
if len(identifiers) == 0 {
address := flow.Address(addressLocation.Address)
err := e.accounts.CheckAccountNotFrozen(address)
if err != nil {
return nil, fmt.Errorf("resolving location failed: %w", err)
}
contractNames, err := e.contracts.GetContractNames(addressLocation.Address)
if err != nil {
return nil, fmt.Errorf("resolving location failed: %w", err)
}
// if there are no contractNames deployed,
// then return no resolved locations
if len(contractNames) == 0 {
return nil, nil
}
identifiers = make([]ast.Identifier, len(contractNames))
for i := range identifiers {
identifiers[i] = runtime.Identifier{
Identifier: contractNames[i],
}
}
}
// return one resolved location per identifier.
// each resolved location is an address contract location
resolvedLocations := make([]runtime.ResolvedLocation, len(identifiers))
for i := range resolvedLocations {
identifier := identifiers[i]
resolvedLocations[i] = runtime.ResolvedLocation{
Location: common.AddressLocation{
Address: addressLocation.Address,
Name: identifier.Identifier,
},
Identifiers: []runtime.Identifier{identifier},
}
}
return resolvedLocations, nil
}
func (e *TransactionEnv) GetCode(location runtime.Location) ([]byte, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetCode)
defer sp.Finish()
}
contractLocation, ok := location.(common.AddressLocation)
if !ok {
return nil, errors.NewInvalidLocationErrorf(location, "expecting an AddressLocation, but other location types are passed")
}
address := flow.BytesToAddress(contractLocation.Address.Bytes())
err := e.accounts.CheckAccountNotFrozen(address)
if err != nil {
return nil, fmt.Errorf("get code failed: %w", err)
}
add, err := e.contracts.GetContract(contractLocation.Address, contractLocation.Name)
if err != nil {
return nil, fmt.Errorf("get code failed: %w", err)
}
return add, nil
}
func (e *TransactionEnv) GetProgram(location common.Location) (*interpreter.Program, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetProgram)
defer sp.Finish()
}
if addressLocation, ok := location.(common.AddressLocation); ok {
address := flow.BytesToAddress(addressLocation.Address.Bytes())
freezeError := e.accounts.CheckAccountNotFrozen(address)
if freezeError != nil {
return nil, fmt.Errorf("get program failed: %w", freezeError)
}
}
program, has := e.programs.Get(location)
if has {
return program, nil
}
return nil, nil
}
func (e *TransactionEnv) SetProgram(location common.Location, program *interpreter.Program) error {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvSetProgram)
defer sp.Finish()
}
err := e.programs.Set(location, program)
if err != nil {
return fmt.Errorf("set program failed: %w", err)
}
return nil
}
func (e *TransactionEnv) ProgramLog(message string) error {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvProgramLog)
defer sp.Finish()
}
if e.ctx.CadenceLoggingEnabled {
e.logs = append(e.logs, message)
}
return nil
}
func (e *TransactionEnv) Logs() []string {
return e.logs
}
func (e *TransactionEnv) EmitEvent(event cadence.Event) error {
// only trace when extensive tracing
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvEmitEvent)
defer sp.Finish()
}
return e.eventHandler.EmitEvent(event, e.txID, e.txIndex, e.tx.Payer)
}
func (e *TransactionEnv) Events() []flow.Event {
return e.eventHandler.Events()
}
func (e *TransactionEnv) ServiceEvents() []flow.Event {
return e.eventHandler.ServiceEvents()
}
func (e *TransactionEnv) GenerateUUID() (uint64, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGenerateUUID)
defer sp.Finish()
}
if e.uuidGenerator == nil {
return 0, errors.NewOperationNotSupportedError("GenerateUUID")
}
uuid, err := e.uuidGenerator.GenerateUUID()
if err != nil {
return 0, fmt.Errorf("generating uuid failed: %w", err)
}
return uuid, err
}
func (e *TransactionEnv) GetComputationLimit() uint64 {
return e.tx.GasLimit
}
func (e *TransactionEnv) SetComputationUsed(used uint64) error {
e.totalGasUsed = used
return nil
}
func (e *TransactionEnv) GetComputationUsed() uint64 {
return e.totalGasUsed
}
func (e *TransactionEnv) SetAccountFrozen(address common.Address, frozen bool) error {
flowAddress := flow.Address(address)
if flowAddress == e.ctx.Chain.ServiceAddress() {
err := errors.NewValueErrorf(flowAddress.String(), "cannot freeze service account")
return fmt.Errorf("setting account frozen failed: %w", err)
}
if !e.isAuthorizerServiceAccount() {
err := errors.NewOperationAuthorizationErrorf("SetAccountFrozen", "accounts can be frozen only by transactions authorized by the service account")
return fmt.Errorf("setting account frozen failed: %w", err)
}
err := e.accounts.SetAccountFrozen(flowAddress, frozen)
if err != nil {
return fmt.Errorf("setting account frozen failed: %w", err)
}
return nil
}
func (e *TransactionEnv) DecodeArgument(b []byte, t cadence.Type) (cadence.Value, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvDecodeArgument)
defer sp.Finish()
}
v, err := jsoncdc.Decode(b)
if err != nil {
err = errors.NewInvalidArgumentErrorf("argument is not json decodable: %w", err)
return nil, fmt.Errorf("decodeing argument failed: %w", err)
}
return v, err
}
func (e *TransactionEnv) Hash(data []byte, tag string, hashAlgorithm runtime.HashAlgorithm) ([]byte, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvHash)
defer sp.Finish()
}
hashAlgo := crypto.RuntimeToCryptoHashingAlgorithm(hashAlgorithm)
return crypto.HashWithTag(hashAlgo, tag, data)
}
func (e *TransactionEnv) VerifySignature(
signature []byte,
tag string,
signedData []byte,
publicKey []byte,
signatureAlgorithm runtime.SignatureAlgorithm,
hashAlgorithm runtime.HashAlgorithm,
) (bool, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvVerifySignature)
defer sp.Finish()
}
valid, err := crypto.VerifySignatureFromRuntime(
e.ctx.SignatureVerifier,
signature,
tag,
signedData,
publicKey,
signatureAlgorithm,
hashAlgorithm,
)
if err != nil {
return false, fmt.Errorf("verifying signature failed: %w", err)
}
return valid, nil
}
func (e *TransactionEnv) ValidatePublicKey(pk *runtime.PublicKey) (bool, error) {
return crypto.ValidatePublicKey(pk.SignAlgo, pk.PublicKey)
}
// Block Environment Functions
// GetCurrentBlockHeight returns the current block height.
func (e *TransactionEnv) GetCurrentBlockHeight() (uint64, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetCurrentBlockHeight)
defer sp.Finish()
}
if e.ctx.BlockHeader == nil {
return 0, errors.NewOperationNotSupportedError("GetCurrentBlockHeight")
}
return e.ctx.BlockHeader.Height, nil
}
// UnsafeRandom returns a random uint64, where the process of random number derivation is not cryptographically
// secure.
func (e *TransactionEnv) UnsafeRandom() (uint64, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvUnsafeRandom)
defer sp.Finish()
}
if e.rng == nil {
return 0, errors.NewOperationNotSupportedError("UnsafeRandom")
}
// TODO (ramtin) return errors this assumption that this always succeeds might not be true
buf := make([]byte, 8)
_, _ = e.rng.Read(buf) // Always succeeds, no need to check error
return binary.LittleEndian.Uint64(buf), nil
}
// GetBlockAtHeight returns the block at the given height.
func (e *TransactionEnv) GetBlockAtHeight(height uint64) (runtime.Block, bool, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetBlockAtHeight)
defer sp.Finish()
}
if e.ctx.Blocks == nil {
return runtime.Block{}, false, errors.NewOperationNotSupportedError("GetBlockAtHeight")
}
if e.ctx.BlockHeader != nil && height == e.ctx.BlockHeader.Height {
return runtimeBlockFromHeader(e.ctx.BlockHeader), true, nil
}
header, err := e.ctx.Blocks.ByHeightFrom(height, e.ctx.BlockHeader)
// TODO (ramtin): remove dependency on storage and move this if condition to blockfinder
if errors.Is(err, storage.ErrNotFound) {
return runtime.Block{}, false, nil
} else if err != nil {
return runtime.Block{}, false, fmt.Errorf("getting block at height failed for height %v: %w", height, err)
}
return runtimeBlockFromHeader(header), true, nil
}
// TODO (ramtin): check with Janez about not passing env
func (e *TransactionEnv) CreateAccount(payer runtime.Address) (address runtime.Address, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvCreateAccount)
defer sp.Finish()
}
flowAddress, err := e.addressGenerator.NextAddress()
if err != nil {
return address, err
}
err = e.accounts.Create(nil, flowAddress)
if err != nil {
return address, fmt.Errorf("creating account failed: %w", err)
}
if e.ctx.ServiceAccountEnabled {
// uses `FlowServiceAccount.setupNewAccount` from https://github.com/onflow/flow-core-contracts/blob/master/contracts/FlowServiceAccount.cdc
invoker := NewTransactionContractFunctionInvocator(
common.AddressLocation{Address: common.BytesToAddress(e.ctx.Chain.ServiceAddress().Bytes()), Name: flowServiceAccountContract},
"setupNewAccount",
[]interpreter.Value{
interpreter.NewAddressValue(common.BytesToAddress(flowAddress.Bytes())),
interpreter.NewAddressValue(common.BytesToAddress(payer.Bytes())),
},
[]sema.Type{
sema.AuthAccountType,
sema.AuthAccountType,
},
e.ctx.Logger,
)
_, invokeErr := invoker.Invoke(e, e.traceSpan)
if invokeErr != nil {
return address, errors.HandleRuntimeError(invokeErr)
}
}
e.ctx.Metrics.RuntimeSetNumberOfAccounts(e.addressGenerator.AddressCount())
return runtime.Address(flowAddress), nil
}
// AddEncodedAccountKey adds an encoded public key to an existing account.
//
// This function returns an error if the specified account does not exist or
// if the key insertion fails.
func (e *TransactionEnv) AddEncodedAccountKey(address runtime.Address, publicKey []byte) error {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvAddAccountKey)
defer sp.Finish()
}
err := e.accounts.CheckAccountNotFrozen(flow.Address(address))
if err != nil {
return fmt.Errorf("adding encoded account key failed: %w", err)
}
err = e.accountKeys.AddEncodedAccountKey(address, publicKey)
if err != nil {
return fmt.Errorf("adding encoded account key failed: %w", err)
}
return nil
}
// RevokeEncodedAccountKey revokes a public key by index from an existing account.
//
// This function returns an error if the specified account does not exist, the
// provided key is invalid, or if key revoking fails.
func (e *TransactionEnv) RevokeEncodedAccountKey(address runtime.Address, index int) (publicKey []byte, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvRemoveAccountKey)
defer sp.Finish()
}
err = e.accounts.CheckAccountNotFrozen(flow.Address(address))
if err != nil {
return nil, fmt.Errorf("revoking encoded account key failed: %w", err)
}
encodedKey, err := e.accountKeys.RemoveAccountKey(address, index)
if err != nil {
return nil, fmt.Errorf("revoking encoded account key failed: %w", err)
}
return encodedKey, nil
}
// 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.
func (e *TransactionEnv) AddAccountKey(
address runtime.Address,
publicKey *runtime.PublicKey,
hashAlgo runtime.HashAlgorithm,
weight int,
) (
*runtime.AccountKey,
error,
) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvAddAccountKey)
defer sp.Finish()
}
accKey, err := e.accountKeys.AddAccountKey(address, publicKey, hashAlgo, weight)
if err != nil {
return nil, fmt.Errorf("adding account key failed: %w", err)
}
return accKey, nil
}
// 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.
func (e *TransactionEnv) GetAccountKey(address runtime.Address, keyIndex int) (*runtime.AccountKey, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetAccountKey)
defer sp.Finish()
}
accKey, err := e.accountKeys.GetAccountKey(address, keyIndex)
if err != nil {
return nil, fmt.Errorf("getting account key failed: %w", err)
}
return accKey, err
}
// 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.
func (e *TransactionEnv) RevokeAccountKey(address runtime.Address, keyIndex int) (*runtime.AccountKey, error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvRemoveAccountKey)
defer sp.Finish()
}
return e.accountKeys.RevokeAccountKey(address, keyIndex)
}
func (e *TransactionEnv) UpdateAccountContractCode(address runtime.Address, name string, code []byte) (err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvUpdateAccountContractCode)
defer sp.Finish()
}
err = e.accounts.CheckAccountNotFrozen(flow.Address(address))
if err != nil {
return fmt.Errorf("updating account contract code failed: %w", err)
}
err = e.contracts.SetContract(address, name, code, e.getSigningAccounts())
if err != nil {
return fmt.Errorf("updating account contract code failed: %w", err)
}
return nil
}
func (e *TransactionEnv) GetAccountContractCode(address runtime.Address, name string) (code []byte, err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetAccountContractCode)
defer sp.Finish()
}
code, err = e.GetCode(common.AddressLocation{
Address: address,
Name: name,
})
if err != nil {
return nil, fmt.Errorf("getting account contract code failed: %w", err)
}
return code, nil
}
func (e *TransactionEnv) RemoveAccountContractCode(address runtime.Address, name string) (err error) {
if e.isTraceable() {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvRemoveAccountContractCode)
defer sp.Finish()
}
err = e.accounts.CheckAccountNotFrozen(flow.Address(address))
if err != nil {
return fmt.Errorf("removing account contract code: %w", err)
}
err = e.contracts.RemoveContract(address, name, e.getSigningAccounts())
if err != nil {
return fmt.Errorf("removing account contract code: %w", err)
}
return nil
}
func (e *TransactionEnv) GetSigningAccounts() ([]runtime.Address, error) {
if e.isTraceable() && e.ctx.ExtensiveTracing {
sp := e.ctx.Tracer.StartSpanFromParent(e.traceSpan, trace.FVMEnvGetSigningAccounts)
defer sp.Finish()
}
return e.getSigningAccounts(), nil
}
func (e *TransactionEnv) getSigningAccounts() []runtime.Address {
if e.authorizers == nil {
e.authorizers = make([]runtime.Address, len(e.tx.Authorizers))
for i, auth := range e.tx.Authorizers {
e.authorizers[i] = runtime.Address(auth)
}
}
return e.authorizers
}
func (e *TransactionEnv) ImplementationDebugLog(message string) error {
e.ctx.Logger.Debug().Msgf("Cadence: %s", message)
return nil
}
func (e *TransactionEnv) ProgramParsed(location common.Location, duration time.Duration) {
if e.isTraceable() {
locStr := ""
if location != nil {
locStr = location.String()
}
e.ctx.Tracer.RecordSpanFromParent(e.traceSpan, trace.FVMCadenceParseProgram, duration,
[]opentracing.LogRecord{
{Timestamp: time.Now(),
Fields: []traceLog.Field{traceLog.String("location", locStr)},
},
},
)
}
e.metrics.ProgramParsed(location, duration)
}
func (e *TransactionEnv) ProgramChecked(location common.Location, duration time.Duration) {
if e.isTraceable() {
locStr := ""
if location != nil {
locStr = location.String()
}
e.ctx.Tracer.RecordSpanFromParent(e.traceSpan, trace.FVMCadenceCheckProgram, duration,
[]opentracing.LogRecord{{Timestamp: time.Now(),
Fields: []traceLog.Field{traceLog.String("location", locStr)},
},
},
)
}
e.metrics.ProgramChecked(location, duration)
}
func (e *TransactionEnv) ProgramInterpreted(location common.Location, duration time.Duration) {
if e.isTraceable() {
locStr := ""
if location != nil {
locStr = location.String()
}
e.ctx.Tracer.RecordSpanFromParent(e.traceSpan, trace.FVMCadenceInterpretProgram, duration,
[]opentracing.LogRecord{{Timestamp: time.Now(),
Fields: []traceLog.Field{traceLog.String("location", locStr)},
},
},
)
}
e.metrics.ProgramInterpreted(location, duration)
}
func (e *TransactionEnv) ValueEncoded(duration time.Duration) {
if e.isTraceable() {
e.ctx.Tracer.RecordSpanFromParent(e.traceSpan, trace.FVMCadenceEncodeValue, duration,
[]opentracing.LogRecord{},
)
}
e.metrics.ValueEncoded(duration)
}
func (e *TransactionEnv) ValueDecoded(duration time.Duration) {
if e.isTraceable() {
e.ctx.Tracer.RecordSpanFromParent(e.traceSpan, trace.FVMCadenceDecodeValue, duration,
[]opentracing.LogRecord{},
)
}
e.metrics.ValueDecoded(duration)
}
// Commit commits changes and return a list of updated keys
func (e *TransactionEnv) Commit() ([]programs.ContractUpdateKey, error) {
// commit changes and return a list of updated keys
err := e.programs.Cleanup()
if err != nil {
return nil, err
}
return e.contracts.Commit()
}