package pipeline import ( "context" "github.com/grassrootseconomics/cic-chain-events/internal/filter" "github.com/grassrootseconomics/cic-chain-events/internal/store" "github.com/grassrootseconomics/cic-chain-events/pkg/fetch" "github.com/jackc/pgx/v5" "github.com/zerodha/logf" ) type ( PipelineOpts struct { BlockFetcher fetch.Fetch Filters []filter.Filter Logg logf.Logger Store store.Store[pgx.Rows] } Pipeline struct { fetch fetch.Fetch filters []filter.Filter logg logf.Logger store store.Store[pgx.Rows] } ) func NewPipeline(o PipelineOpts) *Pipeline { return &Pipeline{ fetch: o.BlockFetcher, filters: o.Filters, logg: o.Logg, store: o.Store, } } // Run is the task executor which runs in its own goroutine and does the following: // 1. Fetches the block and all transactional data // 2. Passes the block through all filters // 3. Commits the block to store as successfully processed // // Note: // - Blocks are processed atomically, a failure in-between will process the block from the start // - Therefore, any side effect/event sink in the filter should support dedup func (md *Pipeline) Run(ctx context.Context, blockNumber uint64) error { fetchResp, err := md.fetch.Block(ctx, blockNumber) if err != nil { return err } for _, tx := range fetchResp.Data.Block.Transactions { for _, filter := range md.filters { next, err := filter.Execute(ctx, tx) if err != nil { return err } if !next { break } } } if err := md.store.CommitBlock(ctx, blockNumber); err != nil { return err } return nil }