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79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
package timer
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop"
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"github.com/nspcc-dev/neo-go/pkg/interop/contract"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
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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/storage"
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"github.com/nspcc-dev/neo-go/pkg/interop/util"
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)
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const defaultTicks = 3
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const mgmtKey = "mgmt"
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var (
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// ctx holds storage context for contract methods
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ctx storage.Context
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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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// ticksKey is a storage key for ticks counter
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ticksKey = []byte("ticks")
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)
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func init() {
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ctx = storage.GetContext()
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}
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func _deploy(_ interface{}, isUpdate bool) {
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if isUpdate {
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ticksLeft := storage.Get(ctx, ticksKey).(int) + 1
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storage.Put(ctx, ticksKey, ticksLeft)
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runtime.Log("One more tick is added.")
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return
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}
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sh := runtime.GetCallingScriptHash()
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storage.Put(ctx, mgmtKey, sh)
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storage.Put(ctx, ticksKey, defaultTicks)
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i := std.Itoa(defaultTicks, 10)
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runtime.Log("Timer set to " + i + " ticks.")
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}
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// Update updates the contract.
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func Update(script []byte, manifest []byte) bool {
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if !runtime.CheckWitness(owner) {
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runtime.Log("Only owner is allowed to update the contract.")
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return false
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}
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mgmt := storage.Get(ctx, mgmtKey).(interop.Hash160)
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contract.Call(mgmt, "update", contract.All, script, manifest)
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runtime.Log("Contract updated.")
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return true
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}
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// Tick decrement ticks count and checks whether the timer is fired.
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func Tick() bool {
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runtime.Log("Tick-tock.")
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ticksLeft := storage.Get(ctx, ticksKey)
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ticksLeft = ticksLeft.(int) - 1
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if ticksLeft == 0 {
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runtime.Log("Fired!")
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return contract.Call(runtime.GetExecutingScriptHash(), "selfDestroy", contract.All).(bool)
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}
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storage.Put(ctx, ticksKey, ticksLeft)
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i := std.Itoa(ticksLeft.(int), 10)
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runtime.Log(i + " ticks left.")
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return true
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}
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// SelfDestroy destroys the contract.
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func SelfDestroy() bool {
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if !(runtime.CheckWitness(owner) || runtime.CheckWitness(runtime.GetExecutingScriptHash())) {
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runtime.Log("Only owner or the contract itself are allowed to destroy the contract.")
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return false
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}
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mgmt := storage.Get(ctx, mgmtKey).(interop.Hash160)
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contract.Call(mgmt, "destroy", contract.All)
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runtime.Log("Destroyed.")
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return true
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}
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