package modules import ( "bytes" "context" "github.com/ipfs/go-bitswap" "github.com/ipfs/go-bitswap/network" "github.com/ipfs/go-blockservice" "github.com/ipfs/go-car" "github.com/ipfs/go-datastore" blockstore "github.com/ipfs/go-ipfs-blockstore" "github.com/libp2p/go-libp2p-core/host" "github.com/libp2p/go-libp2p-core/routing" "go.uber.org/fx" "golang.org/x/xerrors" "github.com/filecoin-project/go-lotus/chain/store" "github.com/filecoin-project/go-lotus/chain/types" "github.com/filecoin-project/go-lotus/node/modules/dtypes" "github.com/filecoin-project/go-lotus/node/modules/helpers" "github.com/filecoin-project/go-lotus/node/repo" ) func ChainExchange(mctx helpers.MetricsCtx, lc fx.Lifecycle, host host.Host, rt routing.Routing, bs dtypes.ChainGCBlockstore) dtypes.ChainExchange { // prefix protocol for chain bitswap // (so bitswap uses /chain/ipfs/bitswap/1.0.0 internally for chain sync stuff) bitswapNetwork := network.NewFromIpfsHost(host, rt, network.Prefix("/chain")) exch := bitswap.New(helpers.LifecycleCtx(mctx, lc), bitswapNetwork, bs) lc.Append(fx.Hook{ OnStop: func(ctx context.Context) error { return exch.Close() }, }) return exch } func ChainBlockstore(r repo.LockedRepo) (dtypes.ChainBlockstore, error) { blocks, err := r.Datastore("/blocks") if err != nil { return nil, err } bs := blockstore.NewBlockstore(blocks) return blockstore.NewIdStore(bs), nil } func ChainGCBlockstore(bs dtypes.ChainBlockstore, gcl dtypes.ChainGCLocker) dtypes.ChainGCBlockstore { return blockstore.NewGCBlockstore(bs, gcl) } func ChainBlockservice(bs dtypes.ChainBlockstore, rem dtypes.ChainExchange) dtypes.ChainBlockService { return blockservice.New(bs, rem) } func ChainStore(lc fx.Lifecycle, bs dtypes.ChainBlockstore, ds dtypes.MetadataDS) *store.ChainStore { chain := store.NewChainStore(bs, ds) if err := chain.Load(); err != nil { log.Warnf("loading chain state from disk: %s", err) } return chain } func ErrorGenesis() Genesis { return func() (header *types.BlockHeader, e error) { return nil, xerrors.New("No genesis block provided, provide the file with 'lotus daemon --genesis=[genesis file]'") } } func LoadGenesis(genBytes []byte) func(dtypes.ChainBlockstore) Genesis { return func(bs dtypes.ChainBlockstore) Genesis { return func() (header *types.BlockHeader, e error) { c, err := car.LoadCar(bs, bytes.NewReader(genBytes)) if err != nil { return nil, err } if len(c.Roots) != 1 { return nil, xerrors.New("expected genesis file to have one root") } root, err := bs.Get(c.Roots[0]) if err != nil { return &types.BlockHeader{}, err } return types.DecodeBlock(root.RawData()) } } } func SetGenesis(cs *store.ChainStore, g Genesis) error { _, err := cs.GetGenesis() if err == nil { return nil // already set, noop } if err != datastore.ErrNotFound { return err } genesis, err := g() if err != nil { return err } return cs.SetGenesis(genesis) }