Only display chain sync in progress if behind sync

Only display `chain sync in progress` if behind sync

cli/wallet.go

@@ -3,11 +3,13 @@ package cli
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/urfave/cli/v2"
 	"golang.org/x/term"
@@ -19,6 +21,7 @@ import (
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/network"
 
+	"github.com/filecoin-project/lotus/api/v0api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/lib/tablewriter"
@@ -206,7 +209,12 @@ var walletBalance = &cli.Command{
 			return err
 		}
 
-		if balance.Equals(types.NewInt(0)) {
+		behindSync, err := isSyncBehind(ctx, api)
+		if err != nil {
+			return err
+		}
+
+		if balance.Equals(types.NewInt(0)) && behindSync {
 			afmt.Printf("%s (warning: may display 0 if chain sync in progress)\n", types.FIL(balance))
 		} else {
 			afmt.Printf("%s\n", types.FIL(balance))
@@ -754,3 +762,16 @@ var walletMarketAdd = &cli.Command{
 		return nil
 	},
 }
+
+func isSyncBehind(ctx context.Context, fullapi v0api.FullNode) (bool, error) {
+	head, err := fullapi.ChainHead(ctx)
+	if err != nil {
+		return false, err
+	}
+
+	if time.Now().Unix()-int64(head.MinTimestamp()) >= int64(build.BlockDelaySecs*5) { // if more than 5 epochs
+		return true, nil
+	}
+
+	return false, nil
+}