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ledger_movement.go
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ledger_movement.go
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// Copyright (c) 2022 Gobalsky Labs Limited
//
// Use of this software is governed by the Business Source License included
// in the LICENSE.DATANODE file and at https://www.mariadb.com/bsl11.
//
// Change Date: 18 months from the later of the date of the first publicly
// available Distribution of this version of the repository, and 25 June 2022.
//
// On the date above, in accordance with the Business Source License, use
// of this software will be governed by version 3 or later of the GNU General
// Public License.
package sqlsubscribers
import (
"context"
"fmt"
"strings"
"time"
"github.com/zeta-protocol/zeta/core/events"
"github.com/zeta-protocol/zeta/datanode/entities"
"github.com/zeta-protocol/zeta/protos/zeta"
"github.com/pkg/errors"
"github.com/shopspring/decimal"
)
type Ledger interface {
AddLedgerEntry(entities.LedgerEntry) error
AddTransferResponse(*zeta.LedgerMovement)
Flush(ctx context.Context) error
}
type TransferResponseEvent interface {
events.Event
LedgerMovements() []*zeta.LedgerMovement
}
type TransferResponse struct {
subscriber
ledger Ledger
accounts AccountService
}
func NewTransferResponse(ledger Ledger, accounts AccountService) *TransferResponse {
return &TransferResponse{
ledger: ledger,
accounts: accounts,
}
}
func (t *TransferResponse) Types() []events.Type {
return []events.Type{events.LedgerMovementsEvent}
}
func (t *TransferResponse) Flush(ctx context.Context) error {
err := t.ledger.Flush(ctx)
return errors.Wrap(err, "flushing ledger")
}
func (t *TransferResponse) Push(ctx context.Context, evt events.Event) error {
return t.consume(ctx, evt.(TransferResponseEvent))
}
func (t *TransferResponse) consume(ctx context.Context, e TransferResponseEvent) error {
var errs strings.Builder
for _, tr := range e.LedgerMovements() {
t.ledger.AddTransferResponse(tr)
for _, vle := range tr.Entries {
if err := t.addLedgerEntry(ctx, vle, e.TxHash(), t.zetaTime); err != nil {
errs.WriteString(fmt.Sprintf("couldn't add ledger entry: %v, error:%s\n", vle, err))
}
}
}
if errs.Len() != 0 {
return errors.Errorf("processing transfer response:%s", errs.String())
}
return nil
}
func (t *TransferResponse) addLedgerEntry(ctx context.Context, vle *zeta.LedgerEntry, txHash string, zetaTime time.Time) error {
fromAcc, err := t.obtainAccountWithAccountDetails(ctx, vle.FromAccount, txHash, zetaTime)
if err != nil {
return errors.Wrap(err, "obtaining 'from' account")
}
toAcc, err := t.obtainAccountWithAccountDetails(ctx, vle.ToAccount, txHash, zetaTime)
if err != nil {
return errors.Wrap(err, "obtaining 'to' account")
}
quantity, err := decimal.NewFromString(vle.Amount)
if err != nil {
return errors.Wrap(err, "parsing amount string")
}
fromAccountBalance, err := decimal.NewFromString(vle.FromAccountBalance)
if err != nil {
return errors.Wrap(err, "parsing FromAccountBalance string")
}
toAccountBalance, err := decimal.NewFromString(vle.ToAccountBalance)
if err != nil {
return errors.Wrap(err, "parsing ToAccountBalance string")
}
le := entities.LedgerEntry{
FromAccountID: fromAcc.ID,
ToAccountID: toAcc.ID,
Quantity: quantity,
TxHash: entities.TxHash(txHash),
ZetaTime: zetaTime,
TransferTime: time.Unix(0, vle.Timestamp),
Type: entities.LedgerMovementType(vle.Type),
FromAccountBalance: fromAccountBalance,
ToAccountBalance: toAccountBalance,
}
err = t.ledger.AddLedgerEntry(le)
if err != nil {
return errors.Wrap(err, "adding to store")
}
return nil
}
// Parse the zeta account ID; if that account already exists in the db, fetch it; else create it.
func (t *TransferResponse) obtainAccountWithAccountDetails(ctx context.Context, ad *zeta.AccountDetails, txHash string, zetaTime time.Time) (entities.Account, error) {
a, err := entities.AccountProtoFromDetails(ad, entities.TxHash(txHash))
if err != nil {
return entities.Account{}, errors.Wrapf(err, "parsing account id: %s", ad.String())
}
a.ZetaTime = zetaTime
err = t.accounts.Obtain(ctx, &a)
if err != nil {
return entities.Account{}, errors.Wrapf(err, "obtaining account for id: %s", ad.String())
}
return a, nil
}