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moment.go
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moment.go
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// Go Substrate RPC Client (GSRPC) provides APIs and types around Polkadot and any Substrate-based chain RPC calls
//
// Copyright 2019 Centrifuge GmbH
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import (
"fmt"
"math"
"time"
"github.com/centrifuge/go-substrate-rpc-client/scale"
)
// Moment is a wrapper around seconds/timestamps using the `time.Time` type. Internally the representation only has
// second precicion (aligning with Rust), so any numbers passed an/out are always per-second. For any encoding/decoding
// the 1000 multiplier would be applied to get it in line with time.Time.
type Moment struct {
time.Time
}
// NewMoment creates a new Moment type
func NewMoment(t time.Time) Moment {
return Moment{t}
}
func (m *Moment) Decode(decoder scale.Decoder) error {
var u uint64
err := decoder.Decode(&u)
if err != nil {
return err
}
// Error in case of overflow
if u > math.MaxInt64 {
return fmt.Errorf("cannot decode a uint64 into a Moment if it overflows int64")
}
*m = NewMoment(time.Unix(int64(u), 0))
return nil
}
func (m Moment) Encode(encoder scale.Encoder) error {
err := encoder.Encode(uint64(m.Unix()))
if err != nil {
return err
}
return nil
}