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delegating.go
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delegating.go
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/*
* Copyright 2020 ICON Foundation
*
* 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 icreward
import (
"fmt"
"math/big"
"github.com/icon-project/goloop/common"
"github.com/icon-project/goloop/common/codec"
"github.com/icon-project/goloop/common/errors"
"github.com/icon-project/goloop/icon/iiss/icobject"
"github.com/icon-project/goloop/icon/iiss/icstage"
"github.com/icon-project/goloop/icon/iiss/icstate"
"github.com/icon-project/goloop/icon/iiss/icutils"
)
type Delegating struct {
icobject.NoDatabase
icstate.Delegations
}
func (d *Delegating) Version() int {
return 0
}
func (d *Delegating) RLPDecodeFields(decoder codec.Decoder) error {
return decoder.Decode(&d.Delegations)
}
func (d *Delegating) RLPEncodeFields(encoder codec.Encoder) error {
return encoder.Encode(d.Delegations)
}
func (d *Delegating) Equal(o icobject.Impl) bool {
if d2, ok := o.(*Delegating); ok {
return d.Delegations.Equal(d2.Delegations)
} else {
return false
}
}
func (d *Delegating) Clone() *Delegating {
if d == nil {
return nil
}
nd := NewDelegating()
for _, ds := range d.Delegations {
nd.Delegations = append(nd.Delegations, ds.Clone())
}
return nd
}
func (d *Delegating) IsEmpty() bool {
return len(d.Delegations) == 0
}
func (d *Delegating) ApplyVotes(deltas icstage.VoteList) error {
var nDelegations icstate.Delegations
// add Delegation not in old Delegations
deltaMap := deltas.ToMap()
for _, dg := range d.Delegations {
_, ok := deltaMap[icutils.ToKey(dg.To())]
if !ok {
nDelegations = append(nDelegations, dg)
}
}
// apply deltas
delegationMap := d.Delegations.ToMap()
for _, vote := range deltas {
dg, ok := delegationMap[icutils.ToKey(vote.To())]
if ok {
value := new(big.Int).Add(dg.Amount(), vote.Amount())
switch value.Sign() {
case -1:
return errors.Errorf("Negative delegation to %s, value %d = %d - %d", vote.To(), value, dg.Amount(), vote.Amount())
case 0:
continue
case 1:
dg = icstate.NewDelegation(common.AddressToPtr(dg.To()), value)
}
} else {
switch vote.Amount().Sign() {
case -1:
return errors.Errorf("Negative delegation to %s, value %d", vote.To(), vote.Amount())
case 0:
continue
case 1:
dg = icstate.NewDelegation(common.AddressToPtr(vote.To()), vote.Amount())
}
}
nDelegations = append(nDelegations, dg)
}
d.Delegations = nDelegations
return nil
}
func (d *Delegating) Format(f fmt.State, c rune) {
switch c {
case 'v':
if f.Flag('+') {
fmt.Fprintf(f, "Delegating{%+v}", d.Delegations)
} else {
fmt.Fprintf(f, "Delegating{%v}", d.Delegations)
}
case 's':
fmt.Fprintf(f, "%s", d.Delegations)
}
}
func newDelegating(_ icobject.Tag) *Delegating {
return new(Delegating)
}
func NewDelegating() *Delegating {
d := new(Delegating)
d.Delegations = make([]*icstate.Delegation, 0)
return d
}