From 6e0ec8741e61b51fb5c9c636da4e8d3610d090ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A2u=20Cao?= <raucao@kip.pe>
Date: Tue, 1 Nov 2022 15:03:58 +0100
Subject: [PATCH] Use a dummy address for the read-only signer

Necessary for ethers not to fail with public RSK nodes
---
 lib/kredits.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/kredits.js b/lib/kredits.js
index 73e8641..12d4828 100644
--- a/lib/kredits.js
+++ b/lib/kredits.js
@@ -69,7 +69,10 @@ class Kredits {
     if (wallet) {
       signer = wallet.connect(ethProvider);
     } else if (ethProvider.getSigner) {
-      signer = ethProvider.getSigner();
+      // Only useful for reading data, not writing. The (unused) address is
+      // necessary because without an address, ethers.js will try to look up
+      // the provider's account 0, which doesn't work on our public RSK nodes.
+      signer = ethProvider.getSigner('0xfa77675540E550b911a6AABF3805ac17C6641ec1');
     }
     return new Kredits(ethProvider, signer, kreditsOptions);
   }