neoneo-go/pkg/neotest/basic.go

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package neotest
import (
"encoding/json"
"fmt"
"math/big"
"strings"
"testing"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/core"
"github.com/nspcc-dev/neo-go/pkg/core/block"
"github.com/nspcc-dev/neo-go/pkg/core/fee"
"github.com/nspcc-dev/neo-go/pkg/core/native"
"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/nspcc-dev/neo-go/pkg/vm/vmstate"
"github.com/nspcc-dev/neo-go/pkg/wallet"
"github.com/stretchr/testify/require"
)
// Executor is a wrapper over chain state.
type Executor struct {
Chain *core.Blockchain
Validator Signer
Committee Signer
CommitteeHash util.Uint160
Contracts map[string]*Contract
}
// NewExecutor creates a new executor instance from the provided blockchain and committee.
func NewExecutor(t testing.TB, bc *core.Blockchain, validator, committee Signer) *Executor {
checkMultiSigner(t, validator)
checkMultiSigner(t, committee)
return &Executor{
Chain: bc,
Validator: validator,
Committee: committee,
CommitteeHash: committee.ScriptHash(),
Contracts: make(map[string]*Contract),
}
}
// TopBlock returns the block with the highest index.
func (e *Executor) TopBlock(t testing.TB) *block.Block {
b, err := e.Chain.GetBlock(e.Chain.GetHeaderHash(e.Chain.BlockHeight()))
require.NoError(t, err)
return b
}
// NativeHash returns a native contract hash by the name.
func (e *Executor) NativeHash(t testing.TB, name string) util.Uint160 {
h, err := e.Chain.GetNativeContractScriptHash(name)
require.NoError(t, err)
return h
}
// ContractHash returns a contract hash by the ID.
func (e *Executor) ContractHash(t testing.TB, id int32) util.Uint160 {
h, err := e.Chain.GetContractScriptHash(id)
require.NoError(t, err)
return h
}
// NativeID returns a native contract ID by the name.
func (e *Executor) NativeID(t testing.TB, name string) int32 {
h := e.NativeHash(t, name)
cs := e.Chain.GetContractState(h)
require.NotNil(t, cs)
return cs.ID
}
// NewUnsignedTx creates a new unsigned transaction which invokes the method of the contract with the hash.
func (e *Executor) NewUnsignedTx(t testing.TB, hash util.Uint160, method string, args ...any) *transaction.Transaction {
script, err := smartcontract.CreateCallScript(hash, method, args...)
require.NoError(t, err)
tx := transaction.New(script, 0)
tx.Nonce = Nonce()
tx.ValidUntilBlock = e.Chain.BlockHeight() + 1
return tx
}
// NewTx creates a new transaction which invokes the contract method.
// The transaction is signed by the signers.
func (e *Executor) NewTx(t testing.TB, signers []Signer,
hash util.Uint160, method string, args ...any) *transaction.Transaction {
tx := e.NewUnsignedTx(t, hash, method, args...)
return e.SignTx(t, tx, -1, signers...)
}
// SignTx signs a transaction using the provided signers.
func (e *Executor) SignTx(t testing.TB, tx *transaction.Transaction, sysFee int64, signers ...Signer) *transaction.Transaction {
for _, acc := range signers {
tx.Signers = append(tx.Signers, transaction.Signer{
Account: acc.ScriptHash(),
Scopes: transaction.Global,
})
}
AddNetworkFee(e.Chain, tx, signers...)
AddSystemFee(e.Chain, tx, sysFee)
for _, acc := range signers {
require.NoError(t, acc.SignTx(e.Chain.GetConfig().Magic, tx))
}
return tx
}
// NewAccount returns a new signer holding 100.0 GAS (or given amount is specified).
// This method advances the chain by one block with a transfer transaction.
func (e *Executor) NewAccount(t testing.TB, expectedGASBalance ...int64) Signer {
acc, err := wallet.NewAccount()
require.NoError(t, err)
amount := int64(100_0000_0000)
if len(expectedGASBalance) != 0 {
amount = expectedGASBalance[0]
}
tx := e.NewTx(t, []Signer{e.Validator},
e.NativeHash(t, nativenames.Gas), "transfer",
e.Validator.ScriptHash(), acc.Contract.ScriptHash(), amount, nil)
e.AddNewBlock(t, tx)
e.CheckHalt(t, tx.Hash())
return NewSingleSigner(acc)
}
// DeployContract compiles and deploys a contract to the bc. It also checks that
// the precalculated contract hash matches the actual one.
// data is an optional argument to `_deploy`.
// It returns the hash of the deploy transaction.
func (e *Executor) DeployContract(t testing.TB, c *Contract, data any) util.Uint256 {
return e.DeployContractBy(t, e.Validator, c, data)
}
// DeployContractBy compiles and deploys a contract to the bc using the provided signer.
// It also checks that the precalculated contract hash matches the actual one.
// data is an optional argument to `_deploy`.
// It returns the hash of the deploy transaction.
func (e *Executor) DeployContractBy(t testing.TB, signer Signer, c *Contract, data any) util.Uint256 {
tx := NewDeployTxBy(t, e.Chain, signer, c, data)
e.AddNewBlock(t, tx)
e.CheckHalt(t, tx.Hash())
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// Check that the precalculated hash matches the real one.
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e.CheckTxNotificationEvent(t, tx.Hash(), -1, state.NotificationEvent{
ScriptHash: e.NativeHash(t, nativenames.Management),
Name: "Deploy",
Item: stackitem.NewArray([]stackitem.Item{
stackitem.NewByteArray(c.Hash.BytesBE()),
}),
})
return tx.Hash()
}
// DeployContractCheckFAULT compiles and deploys a contract to the bc using the validator
// account. It checks that the deploy transaction FAULTed with the specified error.
func (e *Executor) DeployContractCheckFAULT(t testing.TB, c *Contract, data any, errMessage string) {
tx := e.NewDeployTx(t, e.Chain, c, data)
e.AddNewBlock(t, tx)
e.CheckFault(t, tx.Hash(), errMessage)
}
// InvokeScript adds a transaction with the specified script to the chain and
// returns its hash. It does no faults check.
func (e *Executor) InvokeScript(t testing.TB, script []byte, signers []Signer) util.Uint256 {
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tx := e.PrepareInvocation(t, script, signers)
e.AddNewBlock(t, tx)
return tx.Hash()
}
// PrepareInvocation creates a transaction with the specified script and signs it
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// by the provided signer.
func (e *Executor) PrepareInvocation(t testing.TB, script []byte, signers []Signer, validUntilBlock ...uint32) *transaction.Transaction {
tx := transaction.New(script, 0)
tx.Nonce = Nonce()
tx.ValidUntilBlock = e.Chain.BlockHeight() + 1
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if len(validUntilBlock) != 0 {
tx.ValidUntilBlock = validUntilBlock[0]
}
e.SignTx(t, tx, -1, signers...)
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return tx
}
// InvokeScriptCheckHALT adds a transaction with the specified script to the chain
// and checks if it's HALTed with the specified items on stack.
func (e *Executor) InvokeScriptCheckHALT(t testing.TB, script []byte, signers []Signer, stack ...stackitem.Item) {
hash := e.InvokeScript(t, script, signers)
e.CheckHalt(t, hash, stack...)
}
// InvokeScriptCheckFAULT adds a transaction with the specified script to the
// chain and checks if it's FAULTed with the specified error.
func (e *Executor) InvokeScriptCheckFAULT(t testing.TB, script []byte, signers []Signer, errMessage string) util.Uint256 {
hash := e.InvokeScript(t, script, signers)
e.CheckFault(t, hash, errMessage)
return hash
}
// CheckHalt checks that the transaction is persisted with HALT state.
func (e *Executor) CheckHalt(t testing.TB, h util.Uint256, stack ...stackitem.Item) *state.AppExecResult {
aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
require.NoError(t, err)
require.Equal(t, vmstate.Halt, aer[0].VMState, aer[0].FaultException)
if len(stack) != 0 {
require.Equal(t, stack, aer[0].Stack)
}
return &aer[0]
}
// CheckFault checks that the transaction is persisted with FAULT state.
// The raised exception is also checked to contain the s as a substring.
func (e *Executor) CheckFault(t testing.TB, h util.Uint256, s string) {
aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
require.NoError(t, err)
require.Equal(t, vmstate.Fault, aer[0].VMState)
require.True(t, strings.Contains(aer[0].FaultException, s),
"expected: %s, got: %s", s, aer[0].FaultException)
}
// CheckTxNotificationEvent checks that the specified event was emitted at the specified position
// during transaction script execution. Negative index corresponds to backwards enumeration.
func (e *Executor) CheckTxNotificationEvent(t testing.TB, h util.Uint256, index int, expected state.NotificationEvent) {
aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
require.NoError(t, err)
l := len(aer[0].Events)
if index < 0 {
index = l + index
}
require.True(t, 0 <= index && index < l, fmt.Errorf("notification index is out of range: want %d, len is %d", index, l))
require.Equal(t, expected, aer[0].Events[index])
}
// CheckGASBalance ensures that the provided account owns the specified amount of GAS.
func (e *Executor) CheckGASBalance(t testing.TB, acc util.Uint160, expected *big.Int) {
actual := e.Chain.GetUtilityTokenBalance(acc)
require.Equal(t, expected, actual, fmt.Errorf("invalid GAS balance: expected %s, got %s", expected.String(), actual.String()))
}
// EnsureGASBalance ensures that the provided account owns the amount of GAS that satisfies the provided condition.
func (e *Executor) EnsureGASBalance(t testing.TB, acc util.Uint160, isOk func(balance *big.Int) bool) {
actual := e.Chain.GetUtilityTokenBalance(acc)
require.True(t, isOk(actual), fmt.Errorf("invalid GAS balance: got %s, condition is not satisfied", actual.String()))
}
// NewDeployTx returns a new deployment tx for the contract signed by the committee.
func (e *Executor) NewDeployTx(t testing.TB, bc *core.Blockchain, c *Contract, data any) *transaction.Transaction {
return NewDeployTxBy(t, bc, e.Validator, c, data)
}
// NewDeployTxBy returns a new deployment tx for the contract signed by the specified signer.
func NewDeployTxBy(t testing.TB, bc *core.Blockchain, signer Signer, c *Contract, data any) *transaction.Transaction {
rawManifest, err := json.Marshal(c.Manifest)
require.NoError(t, err)
neb, err := c.NEF.Bytes()
require.NoError(t, err)
script, err := smartcontract.CreateCallScript(bc.ManagementContractHash(), "deploy", neb, rawManifest, data)
require.NoError(t, err)
tx := transaction.New(script, 100*native.GASFactor)
tx.Nonce = Nonce()
tx.ValidUntilBlock = bc.BlockHeight() + 1
tx.Signers = []transaction.Signer{{
Account: signer.ScriptHash(),
Scopes: transaction.Global,
}}
AddNetworkFee(bc, tx, signer)
require.NoError(t, signer.SignTx(netmode.UnitTestNet, tx))
return tx
}
// AddSystemFee adds system fee to the transaction. If negative value specified,
// then system fee is defined by test invocation.
func AddSystemFee(bc *core.Blockchain, tx *transaction.Transaction, sysFee int64) {
if sysFee >= 0 {
tx.SystemFee = sysFee
return
}
v, _ := TestInvoke(bc, tx) // ignore error to support failing transactions
tx.SystemFee = v.GasConsumed()
}
// AddNetworkFee adds network fee to the transaction.
func AddNetworkFee(bc *core.Blockchain, tx *transaction.Transaction, signers ...Signer) {
baseFee := bc.GetBaseExecFee()
size := io.GetVarSize(tx)
for _, sgr := range signers {
netFee, sizeDelta := fee.Calculate(baseFee, sgr.Script())
tx.NetworkFee += netFee
size += sizeDelta
}
tx.NetworkFee += int64(size) * bc.FeePerByte()
}
// NewUnsignedBlock creates a new unsigned block from txs.
func (e *Executor) NewUnsignedBlock(t testing.TB, txs ...*transaction.Transaction) *block.Block {
lastBlock := e.TopBlock(t)
b := &block.Block{
Header: block.Header{
NextConsensus: e.Validator.ScriptHash(),
Script: transaction.Witness{
VerificationScript: e.Validator.Script(),
},
Timestamp: lastBlock.Timestamp + 1,
},
Transactions: txs,
}
if e.Chain.GetConfig().StateRootInHeader {
b.StateRootEnabled = true
b.PrevStateRoot = e.Chain.GetStateModule().CurrentLocalStateRoot()
}
b.PrevHash = lastBlock.Hash()
b.Index = e.Chain.BlockHeight() + 1
b.RebuildMerkleRoot()
return b
}
// AddNewBlock creates a new block from the provided transactions and adds it on the bc.
func (e *Executor) AddNewBlock(t testing.TB, txs ...*transaction.Transaction) *block.Block {
b := e.NewUnsignedBlock(t, txs...)
e.SignBlock(b)
require.NoError(t, e.Chain.AddBlock(b))
return b
}
// GenerateNewBlocks adds the specified number of empty blocks to the chain.
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func (e *Executor) GenerateNewBlocks(t testing.TB, count int) []*block.Block {
blocks := make([]*block.Block, count)
for i := 0; i < count; i++ {
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blocks[i] = e.AddNewBlock(t)
}
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return blocks
}
// SignBlock add validators signature to b.
func (e *Executor) SignBlock(b *block.Block) *block.Block {
invoc := e.Validator.SignHashable(uint32(e.Chain.GetConfig().Magic), b)
b.Script.InvocationScript = invoc
return b
}
// AddBlockCheckHalt is a convenient wrapper over AddBlock and CheckHalt.
func (e *Executor) AddBlockCheckHalt(t testing.TB, txs ...*transaction.Transaction) *block.Block {
b := e.AddNewBlock(t, txs...)
for _, tx := range txs {
e.CheckHalt(t, tx.Hash())
}
return b
}
// TestInvoke creates a test VM with a dummy block and executes a transaction in it.
func TestInvoke(bc *core.Blockchain, tx *transaction.Transaction) (*vm.VM, error) {
lastBlock, err := bc.GetBlock(bc.GetHeaderHash(bc.BlockHeight()))
if err != nil {
return nil, err
}
b := &block.Block{
Header: block.Header{
Index: bc.BlockHeight() + 1,
Timestamp: lastBlock.Timestamp + 1,
},
}
// `GetTestVM` as well as `Run` can use a transaction hash which will set a cached value.
// This is unwanted behavior, so we explicitly copy the transaction to perform execution.
ttx := *tx
ic, _ := bc.GetTestVM(trigger.Application, &ttx, b)
defer ic.Finalize()
ic.VM.LoadWithFlags(tx.Script, callflag.All)
err = ic.VM.Run()
return ic.VM, err
}
// GetTransaction returns a transaction and its height by the specified hash.
func (e *Executor) GetTransaction(t testing.TB, h util.Uint256) (*transaction.Transaction, uint32) {
tx, height, err := e.Chain.GetTransaction(h)
require.NoError(t, err)
return tx, height
}
// GetBlockByIndex returns a block by the specified index.
func (e *Executor) GetBlockByIndex(t testing.TB, idx uint32) *block.Block {
h := e.Chain.GetHeaderHash(idx)
require.NotEmpty(t, h)
b, err := e.Chain.GetBlock(h)
require.NoError(t, err)
return b
}
// GetTxExecResult returns application execution results for the specified transaction.
func (e *Executor) GetTxExecResult(t testing.TB, h util.Uint256) *state.AppExecResult {
aer, err := e.Chain.GetAppExecResults(h, trigger.Application)
require.NoError(t, err)
require.Equal(t, 1, len(aer))
return &aer[0]
}