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discoverer_database.go
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/
discoverer_database.go
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package ocrcommon
import (
"context"
"database/sql"
"github.com/lib/pq"
"github.com/pkg/errors"
"go.uber.org/multierr"
ocrnetworking "github.com/smartcontractkit/libocr/networking/types"
)
var _ ocrnetworking.DiscovererDatabase = &DiscovererDatabase{}
type DiscovererDatabase struct {
db *sql.DB
peerID string
}
func NewDiscovererDatabase(db *sql.DB, peerID string) *DiscovererDatabase {
return &DiscovererDatabase{
db,
peerID,
}
}
// StoreAnnouncement has key-value-store semantics and stores a peerID (key) and an associated serialized
// announcement (value).
func (d *DiscovererDatabase) StoreAnnouncement(ctx context.Context, peerID string, ann []byte) error {
_, err := d.db.ExecContext(ctx, `
INSERT INTO ocr_discoverer_announcements (local_peer_id, remote_peer_id, ann, created_at, updated_at)
VALUES ($1,$2,$3,NOW(),NOW()) ON CONFLICT (local_peer_id, remote_peer_id) DO UPDATE SET
ann = EXCLUDED.ann,
updated_at = EXCLUDED.updated_at
;`, d.peerID, peerID, ann)
return errors.Wrap(err, "DiscovererDatabase failed to StoreAnnouncement")
}
// ReadAnnouncements returns one serialized announcement (if available) for each of the peerIDs in the form of a map
// keyed by each announcement's corresponding peer ID.
func (d *DiscovererDatabase) ReadAnnouncements(ctx context.Context, peerIDs []string) (results map[string][]byte, err error) {
rows, err := d.db.QueryContext(ctx, `
SELECT remote_peer_id, ann FROM ocr_discoverer_announcements WHERE remote_peer_id = ANY($1) AND local_peer_id = $2`, pq.Array(peerIDs), d.peerID)
if err != nil {
return nil, errors.Wrap(err, "DiscovererDatabase failed to ReadAnnouncements")
}
defer func() { err = multierr.Combine(err, rows.Close()) }()
results = make(map[string][]byte)
for rows.Next() {
var peerID string
var ann []byte
err = rows.Scan(&peerID, &ann)
if err != nil {
return
}
results[peerID] = ann
}
if err = rows.Err(); err != nil {
return
}
return results, nil
}