mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-28 23:27:36 +00:00
288 lines
13 KiB
Go
288 lines
13 KiB
Go
/*
|
|
Package notary provides an RPC-based wrapper for the Notary subsystem.
|
|
|
|
It provides both regular ContractReader/Contract interfaces for the notary
|
|
contract and notary-specific Actor as well as some helper functions to simplify
|
|
creation of notary requests.
|
|
*/
|
|
package notary
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math"
|
|
"math/big"
|
|
|
|
"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/neorpc/result"
|
|
"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
|
|
)
|
|
|
|
const (
|
|
setMaxNVBDeltaMethod = "setMaxNotValidBeforeDelta"
|
|
setFeePKMethod = "setNotaryServiceFeePerKey"
|
|
)
|
|
|
|
// ContractInvoker is used by ContractReader to perform read-only calls.
|
|
type ContractInvoker interface {
|
|
Call(contract util.Uint160, operation string, params ...any) (*result.Invoke, error)
|
|
}
|
|
|
|
// ContractActor is used by Contract to create and send transactions.
|
|
type ContractActor interface {
|
|
ContractInvoker
|
|
|
|
MakeCall(contract util.Uint160, method string, params ...any) (*transaction.Transaction, error)
|
|
MakeRun(script []byte) (*transaction.Transaction, error)
|
|
MakeUnsignedCall(contract util.Uint160, method string, attrs []transaction.Attribute, params ...any) (*transaction.Transaction, error)
|
|
MakeUnsignedRun(script []byte, attrs []transaction.Attribute) (*transaction.Transaction, error)
|
|
SendCall(contract util.Uint160, method string, params ...any) (util.Uint256, uint32, error)
|
|
SendRun(script []byte) (util.Uint256, uint32, error)
|
|
}
|
|
|
|
// ContractReader represents safe (read-only) methods of Notary. It can be
|
|
// used to query various data, but `verify` method is not exposed there because
|
|
// it can't be successful in standalone invocation (missing transaction with the
|
|
// NotaryAssisted attribute and its signature).
|
|
type ContractReader struct {
|
|
invoker ContractInvoker
|
|
}
|
|
|
|
// Contract provides full Notary interface, both safe and state-changing methods.
|
|
// The only method omitted is onNEP17Payment which can only be called
|
|
// successfully from the GASToken native contract.
|
|
type Contract struct {
|
|
ContractReader
|
|
|
|
actor ContractActor
|
|
}
|
|
|
|
// OnNEP17PaymentData is the data set that is accepted by the notary contract
|
|
// onNEP17Payment handler. It's mandatory for GAS tranfers to this contract.
|
|
type OnNEP17PaymentData struct {
|
|
// Account can be nil, in this case transfer sender (from) account is used.
|
|
Account *util.Uint160
|
|
// Till specifies the deposit lock time (in blocks).
|
|
Till uint32
|
|
}
|
|
|
|
// OnNEP17PaymentData have to implement stackitem.Convertible interface to be
|
|
// compatible with emit package.
|
|
var _ = stackitem.Convertible(&OnNEP17PaymentData{})
|
|
|
|
// Hash stores the hash of the native Notary contract.
|
|
var Hash = state.CreateNativeContractHash(nativenames.Notary)
|
|
|
|
// NewReader creates an instance of ContractReader to get data from the Notary
|
|
// contract.
|
|
func NewReader(invoker ContractInvoker) *ContractReader {
|
|
return &ContractReader{invoker}
|
|
}
|
|
|
|
// New creates an instance of Contract to perform state-changing actions in the
|
|
// Notary contract.
|
|
func New(actor ContractActor) *Contract {
|
|
return &Contract{*NewReader(actor), actor}
|
|
}
|
|
|
|
// BalanceOf returns the locked GAS balance for the given account.
|
|
func (c *ContractReader) BalanceOf(account util.Uint160) (*big.Int, error) {
|
|
return unwrap.BigInt(c.invoker.Call(Hash, "balanceOf", account))
|
|
}
|
|
|
|
// ExpirationOf returns the index of the block when the GAS deposit for the given
|
|
// account will expire.
|
|
func (c *ContractReader) ExpirationOf(account util.Uint160) (uint32, error) {
|
|
res, err := c.invoker.Call(Hash, "expirationOf", account)
|
|
ret, err := unwrap.LimitedInt64(res, err, 0, math.MaxUint32)
|
|
return uint32(ret), err
|
|
}
|
|
|
|
// GetMaxNotValidBeforeDelta returns the maximum NotValidBefore attribute delta
|
|
// that can be used in notary-assisted transactions.
|
|
func (c *ContractReader) GetMaxNotValidBeforeDelta() (uint32, error) {
|
|
res, err := c.invoker.Call(Hash, "getMaxNotValidBeforeDelta")
|
|
ret, err := unwrap.LimitedInt64(res, err, 0, math.MaxUint32)
|
|
return uint32(ret), err
|
|
}
|
|
|
|
// GetNotaryServiceFeePerKey returns the per-key fee amount paid by transactions
|
|
// for the NotaryAssisted attribute.
|
|
func (c *ContractReader) GetNotaryServiceFeePerKey() (int64, error) {
|
|
return unwrap.Int64(c.invoker.Call(Hash, "getNotaryServiceFeePerKey"))
|
|
}
|
|
|
|
// LockDepositUntil creates and sends a transaction that extends the deposit lock
|
|
// time for the given account. The return result from the "lockDepositUntil"
|
|
// method is checked to be true, so transaction fails (with FAULT state) if not
|
|
// successful. The returned values are transaction hash, its ValidUntilBlock
|
|
// value and an error if any.
|
|
func (c *Contract) LockDepositUntil(account util.Uint160, index uint32) (util.Uint256, uint32, error) {
|
|
return c.actor.SendRun(lockScript(account, index))
|
|
}
|
|
|
|
// LockDepositUntilTransaction creates a transaction that extends the deposit lock
|
|
// time for the given account. The return result from the "lockDepositUntil"
|
|
// method is checked to be true, so transaction fails (with FAULT state) if not
|
|
// successful. The returned values are transaction hash, its ValidUntilBlock
|
|
// value and an error if any. The transaction is signed, but not sent to the
|
|
// network, instead it's returned to the caller.
|
|
func (c *Contract) LockDepositUntilTransaction(account util.Uint160, index uint32) (*transaction.Transaction, error) {
|
|
return c.actor.MakeRun(lockScript(account, index))
|
|
}
|
|
|
|
// LockDepositUntilUnsigned creates a transaction that extends the deposit lock
|
|
// time for the given account. The return result from the "lockDepositUntil"
|
|
// method is checked to be true, so transaction fails (with FAULT state) if not
|
|
// successful. The returned values are transaction hash, its ValidUntilBlock
|
|
// value and an error if any. The transaction is not signed and just returned to
|
|
// the caller.
|
|
func (c *Contract) LockDepositUntilUnsigned(account util.Uint160, index uint32) (*transaction.Transaction, error) {
|
|
return c.actor.MakeUnsignedRun(lockScript(account, index), nil)
|
|
}
|
|
|
|
func lockScript(account util.Uint160, index uint32) []byte {
|
|
// We know parameters exactly (unlike with nep17.Transfer), so this can't fail.
|
|
script, _ := smartcontract.CreateCallWithAssertScript(Hash, "lockDepositUntil", account.BytesBE(), int64(index))
|
|
return script
|
|
}
|
|
|
|
// SetMaxNotValidBeforeDelta creates and sends a transaction that sets the new
|
|
// maximum NotValidBefore attribute value delta that can be used in
|
|
// notary-assisted transactions. The action is successful when transaction
|
|
// ends in HALT state. Notice that this setting can be changed only by the
|
|
// network's committee, so use an appropriate Actor. The returned values are
|
|
// transaction hash, its ValidUntilBlock value and an error if any.
|
|
func (c *Contract) SetMaxNotValidBeforeDelta(blocks uint32) (util.Uint256, uint32, error) {
|
|
return c.actor.SendCall(Hash, setMaxNVBDeltaMethod, blocks)
|
|
}
|
|
|
|
// SetMaxNotValidBeforeDeltaTransaction creates a transaction that sets the new
|
|
// maximum NotValidBefore attribute value delta that can be used in
|
|
// notary-assisted transactions. The action is successful when transaction
|
|
// ends in HALT state. Notice that this setting can be changed only by the
|
|
// network's committee, so use an appropriate Actor. The transaction is signed,
|
|
// but not sent to the network, instead it's returned to the caller.
|
|
func (c *Contract) SetMaxNotValidBeforeDeltaTransaction(blocks uint32) (*transaction.Transaction, error) {
|
|
return c.actor.MakeCall(Hash, setMaxNVBDeltaMethod, blocks)
|
|
}
|
|
|
|
// SetMaxNotValidBeforeDeltaUnsigned creates a transaction that sets the new
|
|
// maximum NotValidBefore attribute value delta that can be used in
|
|
// notary-assisted transactions. The action is successful when transaction
|
|
// ends in HALT state. Notice that this setting can be changed only by the
|
|
// network's committee, so use an appropriate Actor. The transaction is not
|
|
// signed and just returned to the caller.
|
|
func (c *Contract) SetMaxNotValidBeforeDeltaUnsigned(blocks uint32) (*transaction.Transaction, error) {
|
|
return c.actor.MakeUnsignedCall(Hash, setMaxNVBDeltaMethod, nil, blocks)
|
|
}
|
|
|
|
// SetNotaryServiceFeePerKey creates and sends a transaction that sets the new
|
|
// per-key fee value paid for using the notary service. The action is successful
|
|
// when transaction ends in HALT state. Notice that this setting can be changed
|
|
// only by the network's committee, so use an appropriate Actor. The returned
|
|
// values are transaction hash, its ValidUntilBlock value and an error if any.
|
|
func (c *Contract) SetNotaryServiceFeePerKey(fee int64) (util.Uint256, uint32, error) {
|
|
return c.actor.SendCall(Hash, setFeePKMethod, fee)
|
|
}
|
|
|
|
// SetNotaryServiceFeePerKeyTransaction creates a transaction that sets the new
|
|
// per-key fee value paid for using the notary service. The action is successful
|
|
// when transaction ends in HALT state. Notice that this setting can be changed
|
|
// only by the network's committee, so use an appropriate Actor. The transaction
|
|
// is signed, but not sent to the network, instead it's returned to the caller.
|
|
func (c *Contract) SetNotaryServiceFeePerKeyTransaction(fee int64) (*transaction.Transaction, error) {
|
|
return c.actor.MakeCall(Hash, setFeePKMethod, fee)
|
|
}
|
|
|
|
// SetNotaryServiceFeePerKeyUnsigned creates a transaction that sets the new
|
|
// per-key fee value paid for using the notary service. The action is successful
|
|
// when transaction ends in HALT state. Notice that this setting can be changed
|
|
// only by the network's committee, so use an appropriate Actor. The transaction
|
|
// is not signed and just returned to the caller.
|
|
func (c *Contract) SetNotaryServiceFeePerKeyUnsigned(fee int64) (*transaction.Transaction, error) {
|
|
return c.actor.MakeUnsignedCall(Hash, setFeePKMethod, nil, fee)
|
|
}
|
|
|
|
// Withdraw creates and sends a transaction that withdraws the deposit belonging
|
|
// to "from" account and sends it to "to" account. The return result from the
|
|
// "withdraw" method is checked to be true, so transaction fails (with FAULT
|
|
// state) if not successful. The returned values are transaction hash, its
|
|
// ValidUntilBlock value and an error if any.
|
|
func (c *Contract) Withdraw(from util.Uint160, to util.Uint160) (util.Uint256, uint32, error) {
|
|
return c.actor.SendRun(withdrawScript(from, to))
|
|
}
|
|
|
|
// WithdrawTransaction creates a transaction that withdraws the deposit belonging
|
|
// to "from" account and sends it to "to" account. The return result from the
|
|
// "withdraw" method is checked to be true, so transaction fails (with FAULT
|
|
// state) if not successful. The transaction is signed, but not sent to the
|
|
// network, instead it's returned to the caller.
|
|
func (c *Contract) WithdrawTransaction(from util.Uint160, to util.Uint160) (*transaction.Transaction, error) {
|
|
return c.actor.MakeRun(withdrawScript(from, to))
|
|
}
|
|
|
|
// WithdrawUnsigned creates a transaction that withdraws the deposit belonging
|
|
// to "from" account and sends it to "to" account. The return result from the
|
|
// "withdraw" method is checked to be true, so transaction fails (with FAULT
|
|
// state) if not successful. The transaction is not signed and just returned to
|
|
// the caller.
|
|
func (c *Contract) WithdrawUnsigned(from util.Uint160, to util.Uint160) (*transaction.Transaction, error) {
|
|
return c.actor.MakeUnsignedRun(withdrawScript(from, to), nil)
|
|
}
|
|
|
|
func withdrawScript(from util.Uint160, to util.Uint160) []byte {
|
|
// We know parameters exactly (unlike with nep17.Transfer), so this can't fail.
|
|
script, _ := smartcontract.CreateCallWithAssertScript(Hash, "withdraw", from.BytesBE(), to.BytesBE())
|
|
return script
|
|
}
|
|
|
|
// ToStackItem implements stackitem.Convertible interface.
|
|
func (d *OnNEP17PaymentData) ToStackItem() (stackitem.Item, error) {
|
|
return stackitem.NewArray([]stackitem.Item{
|
|
stackitem.Make(d.Account),
|
|
stackitem.Make(d.Till),
|
|
}), nil
|
|
}
|
|
|
|
// FromStackItem implements stackitem.Convertible interface.
|
|
func (d *OnNEP17PaymentData) FromStackItem(si stackitem.Item) error {
|
|
arr, ok := si.Value().([]stackitem.Item)
|
|
if !ok {
|
|
return fmt.Errorf("unexpected stackitem type: %s", si.Type())
|
|
}
|
|
if len(arr) != 2 {
|
|
return fmt.Errorf("unexpected number of fields: %d vs %d", len(arr), 2)
|
|
}
|
|
|
|
if arr[0] != stackitem.Item(stackitem.Null{}) {
|
|
accBytes, err := arr[0].TryBytes()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to retrieve account bytes: %w", err)
|
|
}
|
|
acc, err := util.Uint160DecodeBytesBE(accBytes)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to decode account bytes: %w", err)
|
|
}
|
|
d.Account = &acc
|
|
}
|
|
till, err := arr[1].TryInteger()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to retrieve till: %w", err)
|
|
}
|
|
if !till.IsInt64() {
|
|
return errors.New("till is not an int64")
|
|
}
|
|
val := till.Int64()
|
|
if val > math.MaxUint32 {
|
|
return fmt.Errorf("till is larger than max uint32 value: %d", val)
|
|
}
|
|
d.Till = uint32(val)
|
|
|
|
return nil
|
|
}
|