Merge branch 'master' into sbansal/nonce-coordination-and-consensus-for-chain-nodes

cli/util/epoch.go

@@ -0,0 +1,46 @@
+package cliutil
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/hako/durafmt"
+
+	"github.com/filecoin-project/go-state-types/abi"
+
+	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/types"
+)
+
+func EpochTime(curr, e abi.ChainEpoch) string {
+	switch {
+	case curr > e:
+		return fmt.Sprintf("%d (%s ago)", e, durafmt.Parse(time.Second*time.Duration(int64(build.BlockDelaySecs)*int64(curr-e))).LimitFirstN(2))
+	case curr == e:
+		return fmt.Sprintf("%d (now)", e)
+	case curr < e:
+		return fmt.Sprintf("%d (in %s)", e, durafmt.Parse(time.Second*time.Duration(int64(build.BlockDelaySecs)*int64(e-curr))).LimitFirstN(2))
+	}
+
+	panic("math broke")
+}
+
+// EpochTimeTs is like EpochTime, but also outputs absolute time. `ts` is only
+// used to provide a timestamp at some epoch to calculate time from. It can be
+// a genesis tipset.
+//
+// Example output: `1944975 (01 Jul 22 08:07 CEST, 10 hours 29 minutes ago)`
+func EpochTimeTs(curr, e abi.ChainEpoch, ts *types.TipSet) string {
+	timeStr := time.Unix(int64(ts.MinTimestamp()+(uint64(e-ts.Height())*build.BlockDelaySecs)), 0).Format(time.RFC822)
+
+	switch {
+	case curr > e:
+		return fmt.Sprintf("%d (%s, %s ago)", e, timeStr, durafmt.Parse(time.Second*time.Duration(int64(build.BlockDelaySecs)*int64(curr-e))).LimitFirstN(2))
+	case curr == e:
+		return fmt.Sprintf("%d (%s, now)", e, timeStr)
+	case curr < e:
+		return fmt.Sprintf("%d (%s, in %s)", e, timeStr, durafmt.Parse(time.Second*time.Duration(int64(build.BlockDelaySecs)*int64(e-curr))).LimitFirstN(2))
+	}
+
+	panic("math broke")
+}

cli/util/retrieval.go

@@ -0,0 +1,78 @@
+package cliutil
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"path"
+
+	"github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/lotus/api"
+)
+
+func ApiAddrToUrl(apiAddr string) (*url.URL, error) {
+	ma, err := multiaddr.NewMultiaddr(apiAddr)
+	if err == nil {
+		_, addr, err := manet.DialArgs(ma)
+		if err != nil {
+			return nil, err
+		}
+		// todo: make cliutil helpers for this
+		apiAddr = "http://" + addr
+	}
+	aa, err := url.Parse(apiAddr)
+	if err != nil {
+		return nil, xerrors.Errorf("parsing api address: %w", err)
+	}
+	switch aa.Scheme {
+	case "ws":
+		aa.Scheme = "http"
+	case "wss":
+		aa.Scheme = "https"
+	}
+
+	return aa, nil
+}
+
+func ClientExportStream(apiAddr string, apiAuth http.Header, eref api.ExportRef, car bool) (io.ReadCloser, error) {
+	rj, err := json.Marshal(eref)
+	if err != nil {
+		return nil, xerrors.Errorf("marshaling export ref: %w", err)
+	}
+
+	aa, err := ApiAddrToUrl(apiAddr)
+	if err != nil {
+		return nil, err
+	}
+
+	aa.Path = path.Join(aa.Path, "rest/v0/export")
+	req, err := http.NewRequest("GET", fmt.Sprintf("%s?car=%t&export=%s", aa, car, url.QueryEscape(string(rj))), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header = apiAuth
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.StatusCode != http.StatusOK {
+		em, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return nil, xerrors.Errorf("reading error body: %w", err)
+		}
+
+		resp.Body.Close() // nolint
+		return nil, xerrors.Errorf("getting root car: http %d: %s", resp.StatusCode, string(em))
+	}
+
+	return resp.Body, nil
+}