Node builder structure

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

node/builder.go

@@ -0,0 +1,48 @@
+package node
+
+import (
+	"context"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+	"go.uber.org/fx"
+
+	"github.com/filecoin-project/go-lotus/api"
+	"github.com/filecoin-project/go-lotus/build"
+	"github.com/filecoin-project/go-lotus/node/modules"
+)
+
+func New(ctx context.Context) (api.API, error) {
+	var resApi api.Struct
+
+	app := fx.New(
+		fx.Provide(modules.RandomPeerID),
+
+		fx.Invoke(versionApi(&resApi.Internal.Version)),
+		fx.Invoke(idApi(&resApi.Internal.ID)),
+	)
+
+	if err := app.Start(ctx); err != nil {
+		return nil, err
+	}
+
+	return &resApi, nil
+}
+
+// TODO: figure out a better way, this isn't usable in long term
+func idApi(set *func(ctx context.Context) (peer.ID, error)) func(id peer.ID) {
+	return func(id peer.ID) {
+		*set = func(ctx context.Context) (peer.ID, error) {
+			return id, nil
+		}
+	}
+}
+
+func versionApi(set *func(context.Context) (api.Version, error)) func() {
+	return func() {
+		*set = func(context.Context) (api.Version, error) {
+			return api.Version{
+				Version: build.Version,
+			}, nil
+		}
+	}
+}

node/modules/core.go

@@ -0,0 +1 @@
+package modules

node/modules/libp2p.go

@@ -0,0 +1 @@
+package modules

node/modules/testing.go

@@ -0,0 +1,22 @@
+package modules
+
+import (
+	"crypto/rand"
+	"io"
+	"io/ioutil"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+	mh "github.com/multiformats/go-multihash"
+)
+
+func RandomPeerID() (peer.ID, error) {
+	b, err := ioutil.ReadAll(io.LimitReader(rand.Reader, 32))
+	if err != nil {
+		return "", err
+	}
+	hash, err := mh.Sum(b, mh.SHA2_256, -1)
+	if err != nil {
+		return "", err
+	}
+	return peer.ID(hash), nil
+}