added some validation to splash

src/app/validators/bitcoin-address.validator.ts

@@ -0,0 +1,13 @@
+import { AbstractControl, ValidatorFn } from '@angular/forms';
+import { validate } from 'bitcoin-address-validation';
+
+export function bitcoinAddressValidator(): ValidatorFn {
+    return (control: AbstractControl): { [key: string]: any } | null => {
+
+        if (validate(control.value)) {
+            return null;
+        }
+        return { ['bitcoin-address']: true };
+
+    };
+}