neo-go/internal/testchain/transaction.go

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package testchain
import (
"encoding/json"
"fmt"
gio "io"
"strings"
clisc "github.com/nspcc-dev/neo-go/cli/smartcontract"
"github.com/nspcc-dev/neo-go/internal/versionutil"
"github.com/nspcc-dev/neo-go/pkg/compiler"
"github.com/nspcc-dev/neo-go/pkg/config"
"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/state"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// Ledger is an interface that abstracts the implementation of the blockchain.
type Ledger interface {
BlockHeight() uint32
CalculateAttributesFee(tx *transaction.Transaction) int64
FeePerByte() int64
GetBaseExecFee() int64
GetHeader(hash util.Uint256) (*block.Header, error)
GetHeaderHash(uint32) util.Uint256
HeaderHeight() uint32
ManagementContractHash() util.Uint160
}
var (
ownerHash = MultisigScriptHash()
ownerScript = MultisigVerificationScript()
)
// NewTransferFromOwner returns a transaction transferring funds from NEO and GAS owner.
func NewTransferFromOwner(bc Ledger, contractHash, to util.Uint160, amount int64,
nonce, validUntil uint32) (*transaction.Transaction, error) {
script, err := smartcontract.CreateCallWithAssertScript(contractHash, "transfer", ownerHash, to, amount, nil)
if err != nil {
return nil, err
}
tx := transaction.New(script, 11000000)
tx.ValidUntilBlock = validUntil
tx.Nonce = nonce
tx.Signers = []transaction.Signer{{
Account: ownerHash,
Scopes: transaction.CalledByEntry,
AllowedContracts: nil,
AllowedGroups: nil,
}}
return tx, SignTx(bc, tx)
}
// NewDeployTx returns a new deployment transaction for a contract with the source from r and a name equal to
// the filename without '.go' suffix.
func NewDeployTx(bc Ledger, name string, sender util.Uint160, r gio.Reader, confFile *string) (*transaction.Transaction, util.Uint160, []byte, error) {
// nef.NewFile() cares about version a lot.
config.Version = versionutil.TestVersion
o := &compiler.Options{
Name: strings.TrimSuffix(name, ".go"),
NoStandardCheck: true,
NoEventsCheck: true,
}
if confFile != nil {
conf, err := clisc.ParseContractConfig(*confFile)
if err != nil {
return nil, util.Uint160{}, nil, fmt.Errorf("failed to parse configuration: %w", err)
}
o.Name = conf.Name
o.SourceURL = conf.SourceURL
o.ContractEvents = conf.Events
o.DeclaredNamedTypes = conf.NamedTypes
o.ContractSupportedStandards = conf.SupportedStandards
o.Permissions = make([]manifest.Permission, len(conf.Permissions))
for i := range conf.Permissions {
o.Permissions[i] = manifest.Permission(conf.Permissions[i])
}
o.SafeMethods = conf.SafeMethods
o.Overloads = conf.Overloads
}
ne, di, err := compiler.CompileWithOptions(name, r, o)
if err != nil {
return nil, util.Uint160{}, nil, err
}
m, err := compiler.CreateManifest(di, o)
if err != nil {
return nil, util.Uint160{}, nil, fmt.Errorf("failed to create manifest: %w", err)
}
rawManifest, err := json.Marshal(m)
if err != nil {
return nil, util.Uint160{}, nil, err
}
neb, err := ne.Bytes()
if err != nil {
return nil, util.Uint160{}, nil, err
}
script, err := smartcontract.CreateCallScript(bc.ManagementContractHash(), "deploy", neb, rawManifest)
if err != nil {
return nil, util.Uint160{}, nil, err
}
tx := transaction.New(script, 100*native.GASFactor)
tx.Signers = []transaction.Signer{{Account: sender}}
h := state.CreateContractHash(tx.Sender(), ne.Checksum, m.Name)
return tx, h, ne.Script, nil
}
// SignTx signs the provided transactions with validator keys.
func SignTx(bc Ledger, txs ...*transaction.Transaction) error {
signTxGeneric(bc, Sign, ownerScript, txs...)
return nil
}
// SignTxCommittee signs transactions by committee.
func SignTxCommittee(bc Ledger, txs ...*transaction.Transaction) error {
signTxGeneric(bc, SignCommittee, CommitteeVerificationScript(), txs...)
return nil
}
func signTxGeneric(bc Ledger, sign func(hash.Hashable) []byte, verif []byte, txs ...*transaction.Transaction) {
for _, tx := range txs {
size := io.GetVarSize(tx)
netFee, sizeDelta := fee.Calculate(bc.GetBaseExecFee(), verif)
tx.NetworkFee += netFee
size += sizeDelta
tx.NetworkFee += int64(size)*bc.FeePerByte() + bc.CalculateAttributesFee(tx)
tx.Scripts = []transaction.Witness{{
InvocationScript: sign(tx),
VerificationScript: verif,
}}
}
}