From 22eb7f61366f94fed39f49d1c63581fd5d0e2888 Mon Sep 17 00:00:00 2001
From: Minecon724 <minecon724@noreply.git.m724.eu>
Date: Sun, 31 Aug 2025 14:02:00 +0200
Subject: [PATCH] Compatibility mode Env var: NANO_WALLET_COMPATIBILITY

---
 nano/lib/numbers.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/nano/lib/numbers.cpp b/nano/lib/numbers.cpp
index fd826d43..af667f7c 100644
--- a/nano/lib/numbers.cpp
+++ b/nano/lib/numbers.cpp
@@ -1,6 +1,7 @@
 #include <nano/crypto/blake2/blake2.h>
 #include <nano/crypto_lib/random_pool.hpp>
 #include <nano/crypto_lib/secure_memory.hpp>
+#include <nano/lib/env.hpp>
 #include <nano/lib/numbers.hpp>
 #include <nano/lib/utility.hpp>
 #include <nano/secure/common.hpp>
@@ -11,6 +12,8 @@
 #include <cryptopp/aes.h>
 #include <cryptopp/modes.h>
 
+bool nano_wallet_compatibility_mode = nano::env::get<bool> ("NANO_WALLET_COMPATIBILITY").value_or(false);
+
 namespace
 {
 char const * account_lookup ("13456789abcdefghijkmnopqrstuwxyz");
@@ -77,7 +80,7 @@ void nano::public_key::encode_account (std::ostream & os) const
 	}
 
 	// Write prefix
-	os << "dn_";
+	os << (nano_wallet_compatibility_mode ? "nano_" : "dn_");
 
 	// Write encoded characters
 	os.write (encoded.data (), encoded.size ());
@@ -97,7 +100,7 @@ nano::public_key const & nano::public_key::null ()
 
 std::string nano::public_key::to_node_id () const
 {
-	return to_account ().replace (0, 2, "node");
+	return to_account ().replace (0, nano_wallet_compatibility_mode ? 4 : 2, "node");
 }
 
 bool nano::public_key::decode_node_id (std::string const & source_a)