76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
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Package nep31 contains RPC wrappers to work with NEP-31 contracts.
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Contract provides state-changing method of destroyable contracts.
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*/
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package nep31
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import (
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"github.com/tutus-one/tutus-chain/pkg/core/transaction"
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"github.com/tutus-one/tutus-chain/pkg/smartcontract"
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"github.com/tutus-one/tutus-chain/pkg/util"
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)
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// Actor is used by Contract wrapper to create and send transactions.
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type Actor interface {
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MakeRun(script []byte) (*transaction.Transaction, error)
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MakeUnsignedRun(script []byte, attrs []transaction.Attribute) (*transaction.Transaction, error)
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SendRun(script []byte) (util.Uint256, uint32, error)
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}
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// Contract provides full NEP-31 interface.
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type Contract struct {
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hash util.Uint160
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actor Actor
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}
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// NewContract creates an instance of Contract for contract with the given hash
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// using the given Actor.
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func NewContract(actor Actor, hash util.Uint160) *Contract {
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return &Contract{
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hash: hash,
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actor: actor,
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}
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}
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// Destroy creates and sends a transaction that performs a `destroy` method
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// call. This transaction is signed and immediately sent to the network.
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// The returned values are its hash, ValidUntilBlock value and an error, if any.
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func (t *Contract) Destroy() (util.Uint256, uint32, error) {
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script, err := t.destroyScript()
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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 t.actor.SendRun(script)
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}
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// DestroyTransaction creates and signs a transaction invoking the `destroy` method
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// without sending it. The returned values are the signed Transaction and an error
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// if any.
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func (t *Contract) DestroyTransaction() (*transaction.Transaction, error) {
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script, err := t.destroyScript()
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if err != nil {
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return nil, err
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}
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return t.actor.MakeRun(script)
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}
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// DestroyUnsigned creates an unsigned transaction invoking the `destroy` method
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// without sending it. The returned values are the unsigned Transaction and
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// an error if any.
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func (t *Contract) DestroyUnsigned() (*transaction.Transaction, error) {
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script, err := t.destroyScript()
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if err != nil {
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return nil, err
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}
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return t.actor.MakeUnsignedRun(script, nil)
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}
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// destroyScript builds a VM script invoking the `destroy` method of the contract
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// The returned values are the raw script and an error, if any.
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func (t *Contract) destroyScript() ([]byte, error) {
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b := smartcontract.NewBuilder()
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b.InvokeMethod(t.hash, "destroy")
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return b.Script()
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}
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