Add butterfly network

Makefile

@@ -75,6 +75,9 @@ calibnet: lotus lotus-miner lotus-worker lotus-seed
 nerpanet: GOFLAGS+=-tags=nerpanet
 nerpanet: lotus lotus-miner lotus-worker lotus-seed
 
+butterflynet: GOFLAGS+=-tags=butterflynet
+butterflynet: lotus lotus-miner lotus-worker lotus-seed
+
 lotus: $(BUILD_DEPS)
 	rm -f lotus
 	go build $(GOFLAGS) -o lotus ./cmd/lotus

build/bootstrap/butterflynet.pi

@@ -0,0 +1,2 @@
+/dns4/bootstrap-0.butterfly.fildev.network/tcp/1347/p2p/12D3KooWEL9FZVJLzMLMdmyWohJ3y89Z8TaRtZM8Zyya9CVsQNXy
+/dns4/bootstrap-1.butterfly.fildev.network/tcp/1347/p2p/12D3KooWKzWqz87PZXffnbBuP3kEZuQ4qcUymN6SBTFhQTMfsoNY

build/params_butterfly.go

@@ -0,0 +1,52 @@
+// +build butterflynet
+
+package build
+
+import (
+	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/lotus/chain/actors/policy"
+	builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"
+)
+
+var DrandSchedule = map[abi.ChainEpoch]DrandEnum{
+	0: DrandMainnet,
+}
+
+const BootstrappersFile = "butterflynet.pi"
+const GenesisFile = "butterflynet.car"
+
+const UpgradeBreezeHeight = -1
+const BreezeGasTampingDuration = 120
+const UpgradeSmokeHeight = -2
+const UpgradeIgnitionHeight = -3
+const UpgradeRefuelHeight = -4
+
+var UpgradeActorsV2Height = abi.ChainEpoch(30)
+
+const UpgradeTapeHeight = 60
+const UpgradeLiftoffHeight = -5
+const UpgradeKumquatHeight = 90
+const UpgradeCalicoHeight = 120
+const UpgradePersianHeight = 150
+const UpgradeClausHeight = 180
+const UpgradeOrangeHeight = 210
+const UpgradeActorsV3Height = 240
+
+func init() {
+	policy.SetConsensusMinerMinPower(abi.NewStoragePower(2 << 30))
+	policy.SetSupportedProofTypes(
+		abi.RegisteredSealProof_StackedDrg512MiBV1,
+	)
+
+	SetAddressNetwork(address.Testnet)
+
+	Devnet = true
+}
+
+const BlockDelaySecs = uint64(builtin2.EpochDurationSeconds)
+
+const PropagationDelaySecs = uint64(6)
+
+// BootstrapPeerThreshold is the minimum number peers we need to track for a sync worker to start
+const BootstrapPeerThreshold = 2

build/params_mainnet.go

@@ -3,6 +3,7 @@
 // +build !testground
 // +build !calibnet
 // +build !nerpanet
+// +build !butterflynet
 
 package build