github.com/okex/exchain@v1.8.0/libs/tendermint/lite/proxy/verifier.go (about)

     1  package proxy
     2  
     3  import (
     4  	"github.com/pkg/errors"
     5  
     6  	"github.com/okex/exchain/libs/tendermint/config"
     7  	"github.com/okex/exchain/libs/tendermint/libs/log"
     8  	tmos "github.com/okex/exchain/libs/tendermint/libs/os"
     9  	"github.com/okex/exchain/libs/tendermint/lite"
    10  	lclient "github.com/okex/exchain/libs/tendermint/lite/client"
    11  	"github.com/okex/exchain/libs/tendermint/types"
    12  	dbm "github.com/okex/exchain/libs/tm-db"
    13  )
    14  
    15  func NewVerifier(
    16  	chainID,
    17  	rootDir string,
    18  	client lclient.SignStatusClient,
    19  	logger log.Logger,
    20  	cacheSize int,
    21  ) (*lite.DynamicVerifier, error) {
    22  
    23  	logger = logger.With("module", "lite/proxy")
    24  	logger.Info("lite/proxy/NewVerifier()...", "chainID", chainID, "rootDir", rootDir, "client", client)
    25  	err := tmos.EnsureDir(rootDir, config.DefaultDirPerm)
    26  	if err != nil {
    27  		return nil, errors.Wrap(err, "ensure db path")
    28  	}
    29  
    30  	memProvider := lite.NewDBProvider("trusted.mem", dbm.NewMemDB()).SetLimit(cacheSize)
    31  	lvlProvider := lite.NewDBProvider("trusted.lvl", dbm.NewDB("trust-base", dbm.GoLevelDBBackend, rootDir))
    32  	trust := lite.NewMultiProvider(
    33  		memProvider,
    34  		lvlProvider,
    35  	)
    36  	source := lclient.NewProvider(chainID, client)
    37  	cert := lite.NewDynamicVerifier(chainID, trust, source)
    38  	cert.SetLogger(logger) // Sets logger recursively.
    39  
    40  	// TODO: Make this more secure, e.g. make it interactive in the console?
    41  	_, err = trust.LatestFullCommit(chainID, types.GetStartBlockHeight()+1, 1<<63-1)
    42  	if err != nil {
    43  		logger.Info("lite/proxy/NewVerifier found no trusted full commit, initializing from source from height prune height")
    44  		// note: use the prune height to catchup the validators,see:dynamic_verifier.goL149:Verify#updateToHeight
    45  		fc, err := source.LatestFullCommit(chainID, types.GetNodePruneHeight()+1, types.GetNodePruneHeight()+1)
    46  		if err != nil {
    47  			return nil, errors.Wrap(err, "fetching source full commit @ height 1")
    48  		}
    49  		err = trust.SaveFullCommit(fc)
    50  		if err != nil {
    51  			return nil, errors.Wrap(err, "saving full commit to trusted")
    52  		}
    53  	}
    54  
    55  	return cert, nil
    56  }