From 415cb9ff8dfa64cf48f8694bd4c91e96f3f11503 Mon Sep 17 00:00:00 2001
From: Jim McDonald <Jim@mcdee.net>
Date: Thu, 23 Jul 2020 20:56:39 +0100
Subject: [PATCH] Add medalla testnet configuration. (#6700)

---
 shared/featureconfig/config.go          | 15 +++++++++++++-
 shared/featureconfig/flags.go           |  6 ++++++
 shared/params/BUILD.bazel               |  1 +
 shared/params/testnet_medalla_config.go | 27 +++++++++++++++++++++++++
 4 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 shared/params/testnet_medalla_config.go

diff --git a/shared/featureconfig/config.go b/shared/featureconfig/config.go
index 6fd936460..c3c4aa162 100644
--- a/shared/featureconfig/config.go
+++ b/shared/featureconfig/config.go
@@ -33,7 +33,8 @@ type Flags struct {
 	// State locks
 	NewBeaconStateLocks bool // NewStateLocks for updated beacon state locking.
 	// Testnet Flags.
-	AltonaTestnet bool // AltonaTestnet defines the flag through which we can enable the node to run on the altona testnet.
+	AltonaTestnet  bool // AltonaTestnet defines the flag through which we can enable the node to run on the altona testnet.
+	MedallaTestnet bool // MedallaTestnet defines the flag through which we can enable the node to run on the medalla testnet.
 	// Feature related flags.
 	WriteSSZStateTransitions                   bool // WriteSSZStateTransitions to tmp directory.
 	InitSyncNoVerify                           bool // InitSyncNoVerify when initial syncing w/o verifying block's contents.
@@ -120,6 +121,12 @@ func ConfigureBeaconChain(ctx *cli.Context) {
 		params.UseAltonaNetworkConfig()
 		cfg.AltonaTestnet = true
 	}
+	if ctx.Bool(medallaTestnet.Name) {
+		log.Warn("Running Node on Medalla Testnet")
+		params.UseMedallaConfig()
+		params.UseMedallaNetworkConfig()
+		cfg.MedallaTestnet = true
+	}
 	if ctx.Bool(writeSSZStateTransitionsFlag.Name) {
 		log.Warn("Writing SSZ states and blocks after state transitions")
 		cfg.WriteSSZStateTransitions = true
@@ -263,6 +270,12 @@ func ConfigureValidator(ctx *cli.Context) {
 		params.UseAltonaNetworkConfig()
 		cfg.AltonaTestnet = true
 	}
+	if ctx.Bool(medallaTestnet.Name) {
+		log.Warn("Running Validator on Medalla Testnet")
+		params.UseMedallaConfig()
+		params.UseMedallaNetworkConfig()
+		cfg.MedallaTestnet = true
+	}
 	if ctx.Bool(enableLocalProtectionFlag.Name) {
 		cfg.LocalProtection = true
 	} else {
diff --git a/shared/featureconfig/flags.go b/shared/featureconfig/flags.go
index 67cd2a198..3ac825555 100644
--- a/shared/featureconfig/flags.go
+++ b/shared/featureconfig/flags.go
@@ -140,6 +140,10 @@ var (
 		Name:  "altona",
 		Usage: "This defines the flag through which we can run on the Altona Multiclient Testnet",
 	}
+	medallaTestnet = &cli.BoolFlag{
+		Name:  "medalla",
+		Usage: "This defines the flag through which we can run on the Medalla Multiclient Testnet",
+	}
 	enableAccountsV2 = &cli.BoolFlag{
 		Name:  "enable-accounts-v2",
 		Usage: "Enables usage of v2 for Prysm validator accounts",
@@ -566,6 +570,7 @@ var ValidatorFlags = append(deprecatedFlags, []cli.Flag{
 	disableDomainDataCacheFlag,
 	waitForSyncedFlag,
 	altonaTestnet,
+	medallaTestnet,
 	enableAccountsV2,
 }...)
 
@@ -608,6 +613,7 @@ var BeaconChainFlags = append(deprecatedFlags, []cli.Flag{
 	newBeaconStateLocks,
 	forceMaxCoverAttestationAggregation,
 	altonaTestnet,
+	medallaTestnet,
 	batchBlockVerify,
 	initSyncVerbose,
 	enableFinalizedDepositsCache,
diff --git a/shared/params/BUILD.bazel b/shared/params/BUILD.bazel
index 07378c799..8402aa6c5 100644
--- a/shared/params/BUILD.bazel
+++ b/shared/params/BUILD.bazel
@@ -12,6 +12,7 @@ go_library(
         "network_config.go",
         "testnet_altona_config.go",
         "testnet_e2e_config.go",
+        "testnet_medalla_config.go",
         "testnet_onyx_config.go",
         "testutils.go",
     ],
diff --git a/shared/params/testnet_medalla_config.go b/shared/params/testnet_medalla_config.go
new file mode 100644
index 000000000..7266f568d
--- /dev/null
+++ b/shared/params/testnet_medalla_config.go
@@ -0,0 +1,27 @@
+package params
+
+// UseMedallaNetworkConfig uses the Medalla specific
+// network config.
+func UseMedallaNetworkConfig() {
+	cfg := BeaconNetworkConfig().Copy()
+	cfg.ContractDeploymentBlock = 3085928
+	cfg.DepositContractAddress = "0x07b39F4fDE4A38bACe212b546dAc87C58DfE3fDC"
+	cfg.BootstrapNodes = []string{}
+
+	OverrideBeaconNetworkConfig(cfg)
+}
+
+// UseMedallaConfig sets the main beacon chain
+// config for medalla.
+func UseMedallaConfig() {
+	beaconConfig = MedallaConfig()
+}
+
+// MedallaConfig defines the config for the
+// medalla testnet.
+func MedallaConfig() *BeaconChainConfig {
+	cfg := MainnetConfig().Copy()
+	cfg.MinGenesisTime = 1596546000
+	cfg.GenesisForkVersion = []byte{0x00, 0x00, 0x00, 0x01}
+	return cfg
+}