Refactor code base for migration and add upgradehandler for binary mi…

…gration in network (#42)

* chore: fix lint issue

* chore: add upgrades

* chore: refactor code base for store migration

* chore: setup upgrade handler

* feat: fix swap test

app/blocked.go

@@ -0,0 +1,20 @@
+package app
+
+import (
+	"strings"
+)
+
+// BlockedAddrs returns all the app's module account addresses that are not
+// allowed to receive external tokens.
+func (app *App) BlockedAddrs() map[string]bool {
+	blockedAddrs := make(map[string]bool)
+	// We block all OFAC-blocked ETH addresses from receiving tokens as well
+	// The list is sourced from: https://www.treasury.gov/ofac/downloads/sanctions/1.0/sdn_advanced.xml
+	ofacRawEthAddrs := []string{}
+	for _, addr := range ofacRawEthAddrs {
+		blockedAddrs[addr] = true
+		blockedAddrs[strings.ToLower(addr)] = true
+	}
+
+	return blockedAddrs
+}