81 lines
2.3 KiB
Go
81 lines
2.3 KiB
Go
package runtimecontract
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
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"github.com/nspcc-dev/neo-go/pkg/interop/util"
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)
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var (
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// Check if the invoker of the contract is the specified owner
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owner = util.FromAddress("NbrUYaZgyhSkNoRo9ugRyEMdUZxrhkNaWB")
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)
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// init is transformed into _initialize method that is called whenever contract
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// is being loaded (so you'll see this log entry with every invocation).
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func init() {
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// No events and logging allowed in verification context.
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if runtime.GetTrigger() != runtime.Verification {
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runtime.Log("init called")
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}
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}
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// _deploy is called after contract deployment or update, it'll be called
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// in deployment transaction and if call update method of this contract.
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func _deploy(_ interface{}, isUpdate bool) {
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if isUpdate {
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Log("_deploy method called after contract update")
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return
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}
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Log("_deploy method called after contract creation")
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}
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// CheckWitness checks owner's witness. It returns true if invoked by the owner
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// and false otherwise.
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func CheckWitness() bool {
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if runtime.CheckWitness(owner) {
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runtime.Log("Verified Owner")
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return true
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}
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return false
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}
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// Log logs given message.
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func Log(message string) {
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runtime.Log(message)
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}
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// Notify emits an event with the specified data.
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func Notify(event interface{}) {
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runtime.Notify("Event", event)
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}
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// Verify method is used when contract is being used as a signer of transaction,
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// it can have parameters (that then need to be present in invocation script)
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// and it returns simple pass/fail result. This implementation just checks for
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// owner's signature presence.
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func Verify() bool {
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// Technically this restriction is not needed, but you can see the difference
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// between invokefunction and invokecontractverify RPC methods with it.
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if runtime.GetTrigger() != runtime.Verification {
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return false
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}
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return CheckWitness()
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}
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// Destroy destroys the contract, only owner can do that.
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func Destroy() {
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if !Verify() {
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panic("only owner can destroy")
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}
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management.Destroy()
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}
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// Update updates the contract, only owner can do that. _deploy will be called
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// after update.
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func Update(nef, manifest []byte) {
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if !Verify() {
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panic("only owner can update")
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}
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management.Update(nef, manifest)
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}
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