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93 lines
3.9 KiB
Go
93 lines
3.9 KiB
Go
// Package verify contains RPC wrappers for verify contract.
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package verify
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import (
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"math/big"
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)
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// Hash contains contract hash.
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var Hash = util.Uint160{0x33, 0x22, 0x11, 0x0, 0xff, 0xee, 0xdd, 0xcc, 0xbb, 0xaa, 0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11, 0x0}
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// Actor is used by Contract to call state-changing methods.
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type Actor interface {
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MakeCall(contract util.Uint160, method string, params ...interface{}) (*transaction.Transaction, error)
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MakeRun(script []byte) (*transaction.Transaction, error)
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MakeUnsignedCall(contract util.Uint160, method string, attrs []transaction.Attribute, params ...interface{}) (*transaction.Transaction, error)
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MakeUnsignedRun(script []byte, attrs []transaction.Attribute) (*transaction.Transaction, error)
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SendCall(contract util.Uint160, method string, params ...interface{}) (util.Uint256, uint32, error)
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SendRun(script []byte) (util.Uint256, uint32, error)
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}
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// Contract implements all contract methods.
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type Contract struct {
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actor Actor
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}
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// New creates an instance of Contract using Hash and the given Actor.
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func New(actor Actor) *Contract {
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return &Contract{actor}
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}
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func scriptForVerify() ([]byte, error) {
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return smartcontract.CreateCallWithAssertScript(Hash, "verify")
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}
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// Verify creates a transaction invoking `verify` method of the contract.
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// This transaction is signed and immediately sent to the network.
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// The values returned are its hash, ValidUntilBlock value and error if any.
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func (c *Contract) Verify() (util.Uint256, uint32, error) {
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script, err := scriptForVerify()
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if err != nil {
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return util.Uint256{}, 0, err
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}
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return c.actor.SendRun(script)
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}
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// VerifyTransaction creates a transaction invoking `verify` method of the contract.
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// This transaction is signed, but not sent to the network, instead it's
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// returned to the caller.
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func (c *Contract) VerifyTransaction() (*transaction.Transaction, error) {
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script, err := scriptForVerify()
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if err != nil {
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return nil, err
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}
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return c.actor.MakeRun(script)
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}
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// VerifyUnsigned creates a transaction invoking `verify` method of the contract.
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// This transaction is not signed, it's simply returned to the caller.
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// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
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// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
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func (c *Contract) VerifyUnsigned() (*transaction.Transaction, error) {
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script, err := scriptForVerify()
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if err != nil {
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return nil, err
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}
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return c.actor.MakeUnsignedRun(script, nil)
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}
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// OnNEP17Payment creates a transaction invoking `onNEP17Payment` method of the contract.
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// This transaction is signed and immediately sent to the network.
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// The values returned are its hash, ValidUntilBlock value and error if any.
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func (c *Contract) OnNEP17Payment(from []byte, amount *big.Int, data interface{}) (util.Uint256, uint32, error) {
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return c.actor.SendCall(Hash, "onNEP17Payment", from, amount, data)
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}
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// OnNEP17PaymentTransaction creates a transaction invoking `onNEP17Payment` method of the contract.
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// This transaction is signed, but not sent to the network, instead it's
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// returned to the caller.
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func (c *Contract) OnNEP17PaymentTransaction(from []byte, amount *big.Int, data interface{}) (*transaction.Transaction, error) {
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return c.actor.MakeCall(Hash, "onNEP17Payment", from, amount, data)
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}
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// OnNEP17PaymentUnsigned creates a transaction invoking `onNEP17Payment` method of the contract.
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// This transaction is not signed, it's simply returned to the caller.
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// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
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// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
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func (c *Contract) OnNEP17PaymentUnsigned(from []byte, amount *big.Int, data interface{}) (*transaction.Transaction, error) {
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return c.actor.MakeUnsignedCall(Hash, "onNEP17Payment", nil, from, amount, data)
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}
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