status-go/rpc/chain/rpc_limiter_db.go

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package chain
import (
"database/sql"
"time"
)
type RPCLimiterDB struct {
db *sql.DB
}
func NewRPCLimiterDB(db *sql.DB) *RPCLimiterDB {
return &RPCLimiterDB{
db: db,
}
}
func (r *RPCLimiterDB) CreateRPCLimit(limit LimitData) error {
query := `INSERT INTO rpc_limits (tag, created_at, period, max_requests, counter) VALUES (?, ?, ?, ?, ?)`
_, err := r.db.Exec(query, limit.Tag, limit.CreatedAt.Unix(), limit.Period, limit.MaxReqs, limit.NumReqs)
if err != nil {
return err
}
return nil
}
func (r *RPCLimiterDB) GetRPCLimit(tag string) (*LimitData, error) {
query := `SELECT tag, created_at, period, max_requests, counter FROM rpc_limits WHERE tag = ?`
row := r.db.QueryRow(query, tag)
limit := &LimitData{}
createdAtSecs := int64(0)
err := row.Scan(&limit.Tag, &createdAtSecs, &limit.Period, &limit.MaxReqs, &limit.NumReqs)
if err != nil {
return nil, err
}
limit.CreatedAt = time.Unix(createdAtSecs, 0)
return limit, nil
}
func (r *RPCLimiterDB) UpdateRPCLimit(limit LimitData) error {
query := `UPDATE rpc_limits SET created_at = ?, period = ?, max_requests = ?, counter = ? WHERE tag = ?`
_, err := r.db.Exec(query, limit.CreatedAt.Unix(), limit.Period, limit.MaxReqs, limit.NumReqs, limit.Tag)
if err != nil {
return err
}
return nil
}
func (r *RPCLimiterDB) DeleteRPCLimit(tag string) error {
query := `DELETE FROM rpc_limits WHERE tag = ?`
_, err := r.db.Exec(query, tag)
if err != nil && err != sql.ErrNoRows {
return err
}
return nil
}