From ecb31fffc4ae4f6307527933078e8f597907b823 Mon Sep 17 00:00:00 2001
From: Jordan Ribbink <jribbink@telus.net>
Date: Mon, 4 Mar 2024 09:19:15 -0800
Subject: [PATCH] PKG -- [fcl-core] Add previewnet FCLCrypto address

---
 .changeset/stupid-roses-think.md               |  5 +++++
 .../src/app-utils/verify-signatures.js         | 18 ++++++++----------
 2 files changed, 13 insertions(+), 10 deletions(-)
 create mode 100644 .changeset/stupid-roses-think.md

diff --git a/.changeset/stupid-roses-think.md b/.changeset/stupid-roses-think.md
new file mode 100644
index 000000000..88dd5c5a1
--- /dev/null
+++ b/.changeset/stupid-roses-think.md
@@ -0,0 +1,5 @@
+---
+"@onflow/fcl-core": minor
+---
+
+Add previewnet FCLCrypto address
diff --git a/packages/fcl-core/src/app-utils/verify-signatures.js b/packages/fcl-core/src/app-utils/verify-signatures.js
index 6e1d68c64..7c2ea7666 100644
--- a/packages/fcl-core/src/app-utils/verify-signatures.js
+++ b/packages/fcl-core/src/app-utils/verify-signatures.js
@@ -63,20 +63,18 @@ const getVerifySignaturesScript = async (sig, opts) => {
 
   let network = await getChainId(opts)
 
-  let fclCryptoContract
+  const contractAddresses = {
+    testnet: "0x74daa6f9c7ef24b1",
+    mainnet: "0xb4b82a1c9d21d284",
+    previewnet: "0x40b5b8b2ce81ea4a",
+  }
+  const fclCryptoContract = opts.fclCryptoContract || contractAddresses[network]
 
   invariant(
-    opts.fclCryptoContract || network === "testnet" || network === "mainnet",
-    "${verifyFunction}({ fclCryptoContract }) -- fclCrypto contract address must be set for non-mainnet/testnet networks"
+    fclCryptoContract,
+    `${verifyFunction}({ fclCryptoContract }) -- FCLCrypto contract address is unknown for network: ${network}. Please manually specify the FCLCrypto contract address.`
   )
 
-  if (opts.fclCryptoContract) {
-    fclCryptoContract = opts.fclCryptoContract
-  } else {
-    fclCryptoContract =
-      network === "testnet" ? "0x74daa6f9c7ef24b1" : "0xb4b82a1c9d21d284"
-  }
-
   return `
       import FCLCrypto from ${fclCryptoContract}