fc22a46a4c
Note that the protocol differs a bit from #895 in its notifications format, to avoid additional server-side processing we're omitting some metadata like: * block size and confirmations * transaction fees, confirmations, block hash and timestamp * application execution doesn't have ScriptHash populated Some block fields may also differ in encoding compared to `getblock` results (like nonce field). I think these differences are unnoticieable for most use cases, so we can leave them as is, but it can be changed in the future.
79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package response
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import (
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"encoding/json"
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"github.com/pkg/errors"
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)
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type (
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// EventID represents an event type happening on the chain.
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EventID byte
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)
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const (
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// InvalidEventID is an invalid event id that is the default value of
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// EventID. It's only used as an initial value similar to nil.
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InvalidEventID EventID = iota
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// BlockEventID is a `block_added` event.
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BlockEventID
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// TransactionEventID corresponds to `transaction_added` event.
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TransactionEventID
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// NotificationEventID represents `notification_from_execution` events.
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NotificationEventID
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// ExecutionEventID is used for `transaction_executed` events.
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ExecutionEventID
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)
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// String is a good old Stringer implementation.
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func (e EventID) String() string {
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switch e {
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case BlockEventID:
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return "block_added"
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case TransactionEventID:
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return "transaction_added"
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case NotificationEventID:
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return "notification_from_execution"
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case ExecutionEventID:
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return "transaction_executed"
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default:
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return "unknown"
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}
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}
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// GetEventIDFromString converts input string into an EventID if it's possible.
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func GetEventIDFromString(s string) (EventID, error) {
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switch s {
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case "block_added":
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return BlockEventID, nil
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case "transaction_added":
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return TransactionEventID, nil
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case "notification_from_execution":
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return NotificationEventID, nil
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case "transaction_executed":
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return ExecutionEventID, nil
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default:
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return 255, errors.New("invalid stream name")
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}
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}
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// MarshalJSON implements json.Marshaler interface.
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func (e EventID) MarshalJSON() ([]byte, error) {
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return json.Marshal(e.String())
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}
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// UnmarshalJSON implements json.Unmarshaler interface.
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func (e *EventID) UnmarshalJSON(b []byte) error {
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var s string
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err := json.Unmarshal(b, &s)
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if err != nil {
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return err
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}
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id, err := GetEventIDFromString(s)
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if err != nil {
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return err
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}
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*e = id
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return nil
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}
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