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asset_stat.go
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asset_stat.go
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package ingest
import (
"strings"
sq "github.com/Masterminds/squirrel"
"github.com/stellar/go/services/horizon/internal/db2/core"
"github.com/stellar/go/services/horizon/internal/db2/history"
"github.com/stellar/go/support/db"
"github.com/stellar/go/xdr"
)
func (assetsModified AssetsModified) handlePaymentOp(paymentOp *xdr.PaymentOp, sourceAccount *xdr.AccountId) error {
err := assetsModified.updateIfAssetIssuerInvolved(paymentOp.Asset, *sourceAccount)
if err != nil {
return err
}
return assetsModified.updateIfAssetIssuerInvolved(paymentOp.Asset, paymentOp.Destination)
}
func defaultSourceAccount(sourceAccount *xdr.AccountId, defaultAccount *xdr.AccountId) *xdr.AccountId {
if sourceAccount != nil {
return sourceAccount
}
return defaultAccount
}
func (assetsModified AssetsModified) add(asset xdr.Asset) {
assetsModified[asset.String()] = asset
}
// IngestOperation updates the assetsModified using the passed in operation
func (assetsModified AssetsModified) IngestOperation(err error, op *xdr.Operation, source *xdr.AccountId, coreQ *core.Q) error {
if err != nil {
return err
}
body := op.Body
sourceAccount := defaultSourceAccount(op.SourceAccount, source)
switch body.Type {
// TODO NNS 2 need to fix GetCreateAssetID call when adding assets from account
// case xdr.OperationTypeSetOptions:
// assetsModified.addAssetsFromAccount(coreQ, sourceAccount)
case xdr.OperationTypePayment:
// payments is the only operation where we currently perform the optimization of checking against the issuer
return assetsModified.handlePaymentOp(body.PaymentOp, sourceAccount)
case xdr.OperationTypePathPayment:
// if this gets expensive then we can limit it to only include those assets that includes the issuer
assetsModified.add(body.PathPaymentOp.DestAsset)
assetsModified.add(body.PathPaymentOp.SendAsset)
for _, asset := range body.PathPaymentOp.Path {
assetsModified.add(asset)
}
case xdr.OperationTypeManageOffer:
// if this gets expensive then we can limit it to only include those assets that includes the issuer
assetsModified.add(body.ManageOfferOp.Buying)
assetsModified.add(body.ManageOfferOp.Selling)
case xdr.OperationTypeCreatePassiveOffer:
// if this gets expensive then we can limit it to only include those assets that includes the issuer
assetsModified.add(body.CreatePassiveOfferOp.Buying)
assetsModified.add(body.CreatePassiveOfferOp.Selling)
case xdr.OperationTypeChangeTrust:
assetsModified.add(body.ChangeTrustOp.Line)
case xdr.OperationTypeAllowTrust:
asset := body.AllowTrustOp.Asset.ToAsset(*sourceAccount)
assetsModified.add(asset)
}
return nil
}
// UpdateAssetStats updates the db with the latest asset stats for the assets that were modified
func (assetsModified AssetsModified) UpdateAssetStats(is *Session) {
if is.Err != nil {
return
}
hasValue := false
for _, asset := range assetsModified {
assetStat := computeAssetStat(is, &asset)
if is.Err != nil {
return
}
if assetStat != nil {
hasValue = true
is.Ingestion.builders[AssetStatsTableName].Values(
assetStat.ID,
assetStat.Amount,
assetStat.NumAccounts,
assetStat.Flags,
assetStat.Toml,
)
}
}
if hasValue {
// perform a delete first since upsert is not supported if postgres < 9.5
is.Err = assetsModified.deleteRows(is.Ingestion.DB)
if is.Err != nil {
return
}
// can perform a direct upsert if postgres > 9.4
// is.Ingestion.assetStats = is.Ingestion.assetStats.
// Suffix("ON CONFLICT (id) DO UPDATE SET (amount, num_accounts, flags, toml) = (excluded.amount, excluded.num_accounts, excluded.flags, excluded.toml)")
is.Err = is.Ingestion.builders[AssetStatsTableName].Exec(is.Ingestion.DB)
}
}
// func (assetsModified AssetsModified) addAssetsFromAccount(coreQ *core.Q, account *xdr.AccountId) {
// if account == nil {
// return
// }
// var assets []xdr.Asset
// coreQ.AssetsForAddress(&assets, account.Address())
// for _, asset := range assets {
// if asset.Type != xdr.AssetTypeAssetTypeNative {
// assetsModified.add(asset)
// }
// }
// }
func (assetsModified AssetsModified) deleteRows(session *db.Session) error {
if len(assetsModified) == 0 {
return nil
}
assets := make([]xdr.Asset, 0, len(assetsModified))
for _, asset := range assetsModified {
assets = append(assets, asset)
}
historyQ := history.Q{Session: session}
ids, err := historyQ.GetAssetIDs(assets)
if err != nil {
return err
}
if len(ids) == 0 {
return nil
}
deleteStmt := sq.Delete("asset_stats").Where(sq.Eq{"id": ids})
_, err = session.Exec(deleteStmt)
return err
}
func (assetsModified AssetsModified) updateIfAssetIssuerInvolved(asset xdr.Asset, account xdr.AccountId) error {
var assetType, assetCode, assetIssuer string
err := asset.Extract(&assetType, &assetCode, &assetIssuer)
if err != nil {
return err
}
if assetIssuer == account.Address() {
assetsModified.add(asset)
}
return nil
}
func computeAssetStat(is *Session, asset *xdr.Asset) *history.AssetStat {
if asset.Type == xdr.AssetTypeAssetTypeNative {
return nil
}
historyQ := history.Q{Session: is.Ingestion.DB}
assetID, err := historyQ.GetCreateAssetID(*asset)
if err != nil {
is.Err = err
return nil
}
var assetType xdr.AssetType
var assetCode, assetIssuer string
err = asset.Extract(&assetType, &assetCode, &assetIssuer)
if err != nil {
is.Err = err
return nil
}
coreQ := &core.Q{Session: is.Cursor.CoreDB}
numAccounts, amount, err := statTrustlinesInfo(coreQ, assetType, assetCode, assetIssuer)
if err != nil {
is.Err = err
return nil
}
flags, toml, err := statAccountInfo(coreQ, assetIssuer)
if err != nil {
is.Err = err
return nil
}
return &history.AssetStat{
ID: assetID,
Amount: amount,
NumAccounts: numAccounts,
Flags: flags,
Toml: toml,
}
}
// statTrustlinesInfo fetches all the stats from the trustlines table
func statTrustlinesInfo(coreQ *core.Q, assetType xdr.AssetType, assetCode string, assetIssuer string) (int32, int64, error) {
return coreQ.BalancesForAsset(int32(assetType), assetCode, assetIssuer)
}
// statAccountInfo fetches all the stats from the accounts table
func statAccountInfo(coreQ *core.Q, accountID string) (int8, string, error) {
var account core.Account
err := coreQ.AccountByAddress(&account, accountID)
if err != nil {
return -1, "", err
}
var toml string
if !account.HomeDomain.Valid {
toml = ""
} else {
trimmed := strings.TrimSpace(account.HomeDomain.String)
if trimmed != "" {
toml = "https://" + account.HomeDomain.String + "/.well-known/stellar.toml"
} else {
toml = ""
}
}
return int8(account.Flags), toml, nil
}