node: change package interface (#6540)

node/public.go

@@ -0,0 +1,67 @@
+// Package node provides a high level wrapper around tendermint services.
+package node
+
+import (
+	"fmt"
+
+	"github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/libs/log"
+	"github.com/tendermint/tendermint/libs/service"
+	"github.com/tendermint/tendermint/p2p"
+	"github.com/tendermint/tendermint/privval"
+	"github.com/tendermint/tendermint/proxy"
+	"github.com/tendermint/tendermint/types"
+)
+
+// NewDefault constructs a tendermint node service for use in go
+// process that host their own process-local tendermint node. This is
+// equivalent to running tendermint in it's own process communicating
+// to an external ABCI application.
+func NewDefault(conf *config.Config, logger log.Logger) (service.Service, error) {
+	return newDefaultNode(conf, logger)
+}
+
+// New constructs a tendermint node. The ClientCreator makes it
+// possible to construct an ABCI application that runs in the same
+// process as the tendermint node.  The final option is a pointer to a
+// Genesis document: if the value is nil, the genesis document is read
+// from the file specified in the config, and otherwise the node uses
+// value of the final argument.
+func New(conf *config.Config,
+	logger log.Logger,
+	cf proxy.ClientCreator,
+	gen *types.GenesisDoc,
+) (service.Service, error) {
+	nodeKey, err := p2p.LoadOrGenNodeKey(conf.NodeKeyFile())
+	if err != nil {
+		return nil, fmt.Errorf("failed to load or gen node key %s: %w", conf.NodeKeyFile(), err)
+	}
+
+	var genProvider genesisDocProvider
+	switch gen {
+	case nil:
+		genProvider = defaultGenesisDocProviderFunc(conf)
+	default:
+		genProvider = func() (*types.GenesisDoc, error) { return gen, nil }
+	}
+
+	switch conf.Mode {
+	case config.ModeFull, config.ModeValidator:
+		pval, err := privval.LoadOrGenFilePV(conf.PrivValidatorKeyFile(), conf.PrivValidatorStateFile())
+		if err != nil {
+			return nil, err
+		}
+
+		return makeNode(conf,
+			pval,
+			nodeKey,
+			cf,
+			genProvider,
+			config.DefaultDBProvider,
+			logger)
+	case config.ModeSeed:
+		return makeSeedNode(conf, config.DefaultDBProvider, nodeKey, genProvider, logger)
+	default:
+		return nil, fmt.Errorf("%q is not a valid mode", conf.Mode)
+	}
+}