From af628f46a1beaf74b1848593ee7ba200b4d4a67b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20M=C3=B6ller?= <fabianm88@gmail.com>
Date: Sat, 22 Jan 2022 22:07:14 +0100
Subject: [PATCH] nixos/tests/geth: fix api check

Since https://github.com/ethereum/go-ethereum/pull/21686 the `chainId`
API returns an error when the chain is not synced. So use
`blockNumber` as a basic function test.
---
 nixos/tests/geth.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/tests/geth.nix b/nixos/tests/geth.nix
index 10cbd6d9038..af8230553bb 100644
--- a/nixos/tests/geth.nix
+++ b/nixos/tests/geth.nix
@@ -31,7 +31,7 @@ import ./make-test-python.nix ({ pkgs, ... }: {
     machine.wait_for_open_port(18545)
 
     machine.succeed(
-        'geth attach --exec "eth.chainId()" http://localhost:8545 | grep \'"0x0"\' '
+        'geth attach --exec eth.blockNumber http://localhost:8545 | grep \'^0$\' '
     )
 
     machine.succeed(