neo-go/examples/iterator/iterator.go

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package iteratorcontract
import (
"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
)
// _deploy primes contract's storage with some data to be used later.
func _deploy(_ interface{}, _ bool) {
ctx := storage.GetContext() // RW context.
storage.Put(ctx, "foo1", "1")
storage.Put(ctx, "foo2", "2")
storage.Put(ctx, "foo3", "3")
}
// NotifyKeysAndValues sends notification with `foo` storage keys and values.
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func NotifyKeysAndValues() bool {
iter := storage.Find(storage.GetReadOnlyContext(), []byte("foo"), storage.None)
for iterator.Next(iter) {
runtime.Notify("Key-Value", iterator.Value(iter))
}
return true
}
// NotifyValues sends notification with `foo` storage values.
func NotifyValues() bool {
iter := storage.Find(storage.GetReadOnlyContext(), []byte("foo"), storage.ValuesOnly)
for iterator.Next(iter) {
runtime.Notify("Value", iterator.Value(iter))
}
return true
}