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oneoff_transfers.go
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/
oneoff_transfers.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package banking
import (
"context"
"errors"
"fmt"
"sort"
"time"
"code.vegaprotocol.io/vega/core/events"
"code.vegaprotocol.io/vega/core/types"
"code.vegaprotocol.io/vega/logging"
checkpoint "code.vegaprotocol.io/vega/protos/vega/checkpoint/v1"
)
var ErrUnsupportedTransferKind = errors.New("unsupported transfer kind")
type scheduledTransfer struct {
// to send events
oneoff *types.OneOffTransfer
transfer *types.Transfer
accountType types.AccountType
reference string
}
func (s *scheduledTransfer) ToProto() *checkpoint.ScheduledTransfer {
return &checkpoint.ScheduledTransfer{
OneoffTransfer: s.oneoff.IntoEvent(nil),
Transfer: s.transfer.IntoProto(),
AccountType: s.accountType,
Reference: s.reference,
}
}
func scheduledTransferFromProto(p *checkpoint.ScheduledTransfer) (scheduledTransfer, error) {
transfer, err := types.TransferFromProto(p.Transfer)
if err != nil {
return scheduledTransfer{}, err
}
return scheduledTransfer{
oneoff: types.OneOffTransferFromEvent(p.OneoffTransfer),
transfer: transfer,
accountType: p.AccountType,
reference: p.Reference,
}, nil
}
func (e *Engine) oneOffTransfer(
ctx context.Context,
transfer *types.OneOffTransfer,
) (err error) {
defer func() {
if err != nil {
e.broker.Send(events.NewOneOffTransferFundsEventWithReason(ctx, transfer, err.Error()))
} else {
e.broker.Send(events.NewOneOffTransferFundsEvent(ctx, transfer))
}
}()
// ensure asset exists
a, err := e.assets.Get(transfer.Asset)
if err != nil {
transfer.Status = types.TransferStatusRejected
e.log.Debug("cannot transfer funds, invalid asset", logging.Error(err))
return fmt.Errorf("could not transfer funds: %w", err)
}
if err := transfer.IsValid(); err != nil {
transfer.Status = types.TransferStatusRejected
return err
}
if transfer.FromDerivedKey != nil {
if ownsDerivedKey := e.parties.CheckDerivedKeyOwnership(types.PartyID(transfer.From), *transfer.FromDerivedKey); !ownsDerivedKey {
transfer.Status = types.TransferStatusRejected
return fmt.Errorf("party %s does not own derived key %s", transfer.From, *transfer.FromDerivedKey)
}
}
if err := e.ensureMinimalTransferAmount(a, transfer.Amount, transfer.FromAccountType, transfer.From, transfer.FromDerivedKey); err != nil {
transfer.Status = types.TransferStatusRejected
return err
}
tresps, err := e.processTransfer(
ctx, a, transfer.From, transfer.To, "", transfer.FromAccountType,
transfer.ToAccountType, transfer.Amount, transfer.Reference, transfer.ID, e.currentEpoch, transfer.FromDerivedKey,
transfer,
)
if err != nil {
transfer.Status = types.TransferStatusRejected
return err
}
// all was OK
transfer.Status = types.TransferStatusDone
e.broker.Send(events.NewLedgerMovements(ctx, tresps))
return nil
}
type timesToTransfers struct {
deliverOn int64
transfer []scheduledTransfer
}
func (e *Engine) distributeScheduledTransfers(ctx context.Context, now time.Time) error {
ttfs := []timesToTransfers{}
// iterate over those scheduled transfers to sort them by time
for k, v := range e.scheduledTransfers {
if now.UnixNano() >= k {
ttfs = append(ttfs, timesToTransfers{k, v})
delete(e.scheduledTransfers, k)
}
}
// sort slice by time.
// no need to sort transfers they are going out as first in first out.
sort.SliceStable(ttfs, func(i, j int) bool {
return ttfs[i].deliverOn < ttfs[j].deliverOn
})
transfers := []*types.Transfer{}
accountTypes := []types.AccountType{}
references := []string{}
evts := []events.Event{}
for _, v := range ttfs {
for _, t := range v.transfer {
t.oneoff.Status = types.TransferStatusDone
evts = append(evts, events.NewOneOffTransferFundsEvent(ctx, t.oneoff))
transfers = append(transfers, t.transfer)
accountTypes = append(accountTypes, t.accountType)
references = append(references, t.reference)
}
}
if len(transfers) <= 0 {
// nothing to do yeay
return nil
}
// at least 1 transfer updated, set to true
tresps, err := e.col.TransferFunds(
ctx, transfers, accountTypes, references, nil, nil, // no fees required there, they've been paid already
)
if err != nil {
return err
}
e.broker.Send(events.NewLedgerMovements(ctx, tresps))
e.broker.SendBatch(evts)
return nil
}
func (e *Engine) scheduleTransfer(
oneoff *types.OneOffTransfer,
t *types.Transfer,
ty types.AccountType,
reference string,
deliverOn time.Time,
) {
sts, ok := e.scheduledTransfers[deliverOn.UnixNano()]
if !ok {
e.scheduledTransfers[deliverOn.UnixNano()] = []scheduledTransfer{}
sts = e.scheduledTransfers[deliverOn.UnixNano()]
}
sts = append(sts, scheduledTransfer{
oneoff: oneoff,
transfer: t,
accountType: ty,
reference: reference,
})
e.scheduledTransfers[deliverOn.UnixNano()] = sts
}