Move MinWallets to netParams.

We already have a file with hard-coded parameters for each Decred network, so having logic to figure out parameters later is unnecessary.

config.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2020-2021 The Decred developers
+// Copyright (c) 2020-2022 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -276,13 +276,11 @@ func loadConfig() (*config, error) {
 	}
 
 	// Set the active network.
-	minRequired := 1
 	switch cfg.Network {
 	case "testnet":
 		cfg.netParams = &testNet3Params
 	case "mainnet":
 		cfg.netParams = &mainNetParams
-		minRequired = 3
 	case "simnet":
 		cfg.netParams = &simNetParams
 	}
@@ -388,9 +386,9 @@ func loadConfig() (*config, error) {
 	}
 
 	// Verify minimum number of voting wallets are configured.
-	if numHost < minRequired {
+	if numHost < cfg.netParams.MinWallets {
 		return nil, fmt.Errorf("minimum required voting wallets has not been met: %d < %d",
-			numHost, minRequired)
+			numHost, cfg.netParams.MinWallets)
 	}
 
 	// Add default port for the active network if there is no port specified.

params.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2020 The Decred developers
+// Copyright (c) 2020-2022 The Decred developers
 // Use of this source code is governed by an ISC
 // license that can be found in the LICENSE file.
 
@@ -13,6 +13,10 @@ type netParams struct {
 	DcrdRPCServerPort   string
 	WalletRPCServerPort string
 	BlockExplorerURL    string
+	// MinWallets is the minimum number of voting wallets required for a vspd
+	// deployment on this network. vspd will log an error and refuse to start if
+	// fewer wallets are configured.
+	MinWallets int
 }
 
 var mainNetParams = netParams{
@@ -20,6 +24,7 @@ var mainNetParams = netParams{
 	DcrdRPCServerPort:   "9109",
 	WalletRPCServerPort: "9110",
 	BlockExplorerURL:    "https://dcrdata.decred.org",
+	MinWallets:          3,
 }
 
 var testNet3Params = netParams{
@@ -27,6 +32,7 @@ var testNet3Params = netParams{
 	DcrdRPCServerPort:   "19109",
 	WalletRPCServerPort: "19110",
 	BlockExplorerURL:    "https://testnet.dcrdata.org",
+	MinWallets:          1,
 }
 
 var simNetParams = netParams{
@@ -34,4 +40,5 @@ var simNetParams = netParams{
 	DcrdRPCServerPort:   "19556",
 	WalletRPCServerPort: "19557",
 	BlockExplorerURL:    "...",
+	MinWallets:          1,
 }