From ecc38d1bd876c181cff88cf3a9a0205c6d38d51f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Mon, 20 Apr 2020 19:43:02 +0200
Subject: [PATCH] sync: env var to fix drand

---
 chain/stmgr/utils.go | 22 +++++++++++++---------
 chain/store/store.go |  7 +++++++
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/chain/stmgr/utils.go b/chain/stmgr/utils.go
index 81900cdfc..5381f9c47 100644
--- a/chain/stmgr/utils.go
+++ b/chain/stmgr/utils.go
@@ -2,7 +2,15 @@ package stmgr
 
 import (
 	"context"
+	"os"
 
+	cid "github.com/ipfs/go-cid"
+	blockstore "github.com/ipfs/go-ipfs-blockstore"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	cbg "github.com/whyrusleeping/cbor-gen"
+	"golang.org/x/xerrors"
+
+	"github.com/filecoin-project/go-address"
 	amt "github.com/filecoin-project/go-amt-ipld/v2"
 	"github.com/filecoin-project/sector-storage/ffiwrapper"
 	"github.com/filecoin-project/specs-actors/actors/abi"
@@ -14,8 +22,6 @@ import (
 	"github.com/filecoin-project/specs-actors/actors/crypto"
 	"github.com/filecoin-project/specs-actors/actors/util/adt"
 
-	"github.com/filecoin-project/go-address"
-
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/state"
@@ -23,12 +29,6 @@ import (
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/chain/vm"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
-
-	cid "github.com/ipfs/go-cid"
-	blockstore "github.com/ipfs/go-ipfs-blockstore"
-	cbor "github.com/ipfs/go-ipld-cbor"
-	cbg "github.com/whyrusleeping/cbor-gen"
-	"golang.org/x/xerrors"
 )
 
 func GetNetworkName(ctx context.Context, sm *StateManager, st cid.Cid) (dtypes.NetworkName, error) {
@@ -473,7 +473,11 @@ func MinerGetBaseInfo(ctx context.Context, sm *StateManager, tsk types.TipSetKey
 
 	prev, err := sm.ChainStore().GetLatestBeaconEntry(ts)
 	if err != nil {
-		return nil, xerrors.Errorf("failed to get latest beacon entry: %w", err)
+		if os.Getenv("LOTUS_IGNORE_DRAND") != "_yes_" {
+			return nil, xerrors.Errorf("failed to get latest beacon entry: %w", err)
+		}
+
+		prev = &types.BeaconEntry{}
 	}
 
 	worker, err := sm.ResolveToKeyAddress(ctx, mas.GetWorker(), ts)
diff --git a/chain/store/store.go b/chain/store/store.go
index d58d8cf2d..63df6d7d9 100644
--- a/chain/store/store.go
+++ b/chain/store/store.go
@@ -6,6 +6,7 @@ import (
 	"encoding/binary"
 	"encoding/json"
 	"io"
+	"os"
 	"sync"
 
 	"github.com/filecoin-project/specs-actors/actors/crypto"
@@ -1114,6 +1115,12 @@ func (cs *ChainStore) GetLatestBeaconEntry(ts *types.TipSet) (*types.BeaconEntry
 		cur = next
 	}
 
+	if os.Getenv("LOTUS_IGNORE_DRAND") == "_yes_" {
+		return &types.BeaconEntry{
+			Data: []byte{9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9},
+		}, nil
+	}
+
 	return nil, xerrors.Errorf("found NO beacon entries in the 20 blocks prior to given tipset")
 }