From 65f8fae67a15d5e9e48d686d86347c11498fb91d Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Sat, 1 Aug 2020 11:43:34 -0700
Subject: [PATCH 1/2] allow chain list to print useful gas statistics

---
 cli/chain.go | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 64 insertions(+), 2 deletions(-)

diff --git a/cli/chain.go b/cli/chain.go
index 1bb34e673..f692c5476 100644
--- a/cli/chain.go
+++ b/cli/chain.go
@@ -15,6 +15,7 @@ import (
 	"github.com/filecoin-project/go-address"
 	cborutil "github.com/filecoin-project/go-cbor-util"
 	"github.com/filecoin-project/specs-actors/actors/abi"
+	"github.com/filecoin-project/specs-actors/actors/abi/big"
 	"github.com/filecoin-project/specs-actors/actors/builtin"
 	"github.com/filecoin-project/specs-actors/actors/builtin/account"
 	"github.com/filecoin-project/specs-actors/actors/builtin/market"
@@ -27,6 +28,7 @@ import (
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
 	types "github.com/filecoin-project/lotus/chain/types"
 )
@@ -365,6 +367,10 @@ var chainListCmd = &cli.Command{
 			Usage: "specify the format to print out tipsets",
 			Value: "<height>: (<time>) <blocks>",
 		},
+		&cli.BoolFlag{
+			Name:  "gas-stats",
+			Usage: "view gas statistics for the chain",
+		},
 	},
 	Action: func(cctx *cli.Context) error {
 		api, closer, err := GetFullNodeAPI(cctx)
@@ -406,8 +412,64 @@ var chainListCmd = &cli.Command{
 			tss = append(tss, head)
 		}
 
-		for i := len(tss) - 1; i >= 0; i-- {
-			printTipSet(cctx.String("format"), tss[i])
+		if cctx.Bool("gas-stats") {
+			otss := make([]*types.TipSet, 0, len(tss))
+			for i := len(tss) - 1; i >= 0; i-- {
+				otss = append(otss, tss[i])
+			}
+			tss = otss
+			for i, ts := range tss {
+				fmt.Printf("%d: %d blocks\n", ts.Height(), len(ts.Blocks()))
+
+				for _, b := range ts.Blocks() {
+					msgs, err := api.ChainGetBlockMessages(ctx, b.Cid())
+					if err != nil {
+						return err
+					}
+					var limitSum int64
+					psum := big.NewInt(0)
+					for _, m := range msgs.BlsMessages {
+						limitSum += m.GasLimit
+						psum = big.Add(psum, m.GasPrice)
+					}
+
+					for _, m := range msgs.SecpkMessages {
+						limitSum += m.Message.GasLimit
+						psum = big.Add(psum, m.Message.GasPrice)
+					}
+
+					avgprice := big.Div(psum, big.NewInt(int64(len(msgs.BlsMessages)+len(msgs.SecpkMessages))))
+
+					fmt.Printf("\t%s: \t%d msgs, gasLimit: %d / %d (%0.2f%%), avgPrice: %s\n", b.Miner, len(msgs.BlsMessages)+len(msgs.SecpkMessages), limitSum, build.BlockGasLimit, 100*float64(limitSum)/float64(build.BlockGasLimit), avgprice)
+				}
+				if i < len(tss)-1 {
+					msgs, err := api.ChainGetParentMessages(ctx, tss[i+1].Blocks()[0].Cid())
+					if err != nil {
+						return err
+					}
+					var limitSum int64
+					for _, m := range msgs {
+						limitSum += m.Message.GasLimit
+					}
+
+					recpts, err := api.ChainGetParentReceipts(ctx, tss[i+1].Blocks()[0].Cid())
+					if err != nil {
+						return err
+					}
+
+					var gasUsed int64
+					for _, r := range recpts {
+						gasUsed += r.GasUsed
+					}
+
+					fmt.Printf("\ttipset: %d msgs, %d / %d (%0.2f%%)\n", len(msgs), gasUsed, limitSum, 100*float64(gasUsed)/float64(limitSum))
+				}
+				fmt.Println()
+			}
+		} else {
+			for i := len(tss) - 1; i >= 0; i-- {
+				printTipSet(cctx.String("format"), tss[i])
+			}
 		}
 		return nil
 	},

From 883b8467b5723b329d46b78f749c716f19d2dd2b Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Sat, 1 Aug 2020 13:13:29 -0700
Subject: [PATCH 2/2] fix spacing

---
 cli/chain.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cli/chain.go b/cli/chain.go
index f692c5476..4eb8a9aa8 100644
--- a/cli/chain.go
+++ b/cli/chain.go
@@ -462,7 +462,7 @@ var chainListCmd = &cli.Command{
 						gasUsed += r.GasUsed
 					}
 
-					fmt.Printf("\ttipset: %d msgs, %d / %d (%0.2f%%)\n", len(msgs), gasUsed, limitSum, 100*float64(gasUsed)/float64(limitSum))
+					fmt.Printf("\ttipset: \t%d msgs, %d / %d (%0.2f%%)\n", len(msgs), gasUsed, limitSum, 100*float64(gasUsed)/float64(limitSum))
 				}
 				fmt.Println()
 			}