Use DeFi Llama Chainlist (#1158)

We require that the chain appears on https://chainlist.org/, and
previously, this meant that the chain was included in the
ethereum-lists/chains repository. However, since that repository is no
longer actively maintained, and since then DeFi Llama has added
mechanisms for "additional chains" to their DeFiLlama/chainlist
repository, which is the code behind https://chainlist.org/.

This PR changes our scripts to use the Chainlist.org API for checking if
a network is listed or not (instead of the ethereum-lists/chains
repository).

---------

Co-authored-by: Nicholas Rodrigues Lordello <nick@safe.global>

Author: Zalens

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,6 @@
 ## Add new chain
 
-> Template to provide information about the new chain. Only add extra information in the bottom section. Ensure that the contracts are deployed on the chain, if not deploy with [safe-contracts](https://github.com/safe-global/safe-contracts). Only **one** chain ID, **one** Safe version and **one** deployment type per PR. The RPC will be taken from [ethereum-lists/chains](https://github.com/ethereum-lists/chains). This entire paragraph should be deleted.
+> Template to provide information about the new chain. Only add extra information in the bottom section. Ensure that the contracts are deployed on the chain, if not deploy with [safe-contracts](https://github.com/safe-global/safe-contracts). Only **one** chain ID, **one** Safe version and **one** deployment type per PR. The RPC will be taken from [DefiLlama's ChainList](https://chainlist.org/). This entire paragraph should be deleted.
 
 Please fill the following form:
 

bin/github-review.sh

@@ -45,10 +45,23 @@ if [[ -z $chainid ]]; then
     echo "ERROR: Chain ID not specified as per the PR Template" 1>&2
     exit 1
 fi
-chainInfo="https://raw.githubusercontent.com/ethereum-lists/chains/refs/heads/master/_data/chains/eip155-$chainid.json"
-rpc="$(curl -sfL "$chainInfo" | jq -r '.rpc[0]')"
+
+# Fetch RPC from DefiLlama's chainlist
+if ! chainlist_response="$(curl -sfL 'https://chainlist.org/rpcs.json')"; then
+    echo "ERROR: Failed to fetch DeFiLlama ChainList" 1>&2
+    exit 1
+fi
+
+# Parse the chainlist response
+if ! chainlist=$(echo "$chainlist_response" | jq -e '.'); then
+    echo "ERROR: DefiLlama's ChainList returned invalid JSON" 1>&2
+    exit 1
+fi
+
+# Extract RPC for the specified chain ID using jq
+rpc="$(echo "$chainlist" | jq --arg C "$chainid" -r '.[] | select((.chainId | tostring) == $C) | .rpc[0].url')"
 if [[ -z $rpc ]]; then
-    echo "ERROR: RPC not fetched correctly from the ethereum-lists" 1>&2
+    echo "ERROR: Chain is not listed on DefiLlama's ChainList" 1>&2
     exit 1
 fi
 version="$(gh pr diff $pr --name-only | sed -nE 's|^src/assets/v([0-9\.]*)/.*$|\1|p' | sort -u)"
@@ -89,4 +102,3 @@ git restore --ignore-unmerged -- src/assets
 
 # NOTE/TODO
 # - We should still manually verify there is no removal of deployment types for a single chain.
-# - Getting the RPC from the Chainlist website instead of looking based on the provided RPC: https://github.com/safe-global/safe-deployments/pull/683#discussion_r1668555849

scripts/review/verifyDeployment.ts

@@ -46,13 +46,21 @@ async function main() {
   debug('Parsed options:');
   debug(options);
 
-  await fetch(`https://chainlist.org/chain/${options.chainId}`).then((response) => {
-    if (!response.ok) {
-      debug(response);
-      throw new Error(`chain is not registered on Chainlist`);
-    }
-  });
-  debug(`chain ${options.chainId} exists on Chainlist`);
+  // Verify chain exists in DefiLlama's chainlist
+  const response = await fetch('https://chainlist.org/rpcs.json');
+  if (!response.ok) {
+    debug(`fetching chain list failed with HTTP status ${response.status}`);
+    throw new Error(`Failed to fetch chainlist from DefiLlama`);
+  }
+  const chainlist = (await response.json()) as Array<{ chainId: number; rpcs: string[] }>;
+  if (!Array.isArray(chainlist)) {
+    throw new Error('Invalid response format from DefiLlama chainlist');
+  }
+  const chainExists = chainlist.some((chain) => `${chain.chainId}` === options.chainId);
+  if (!chainExists) {
+    throw new Error(`Chain ${options.chainId} is not registered on DefiLlama's ChainList`);
+  }
+  debug(`chain ${options.chainId} exists on DefiLlama's ChainList`);
 
   const provider = new ethers.JsonRpcProvider(options.rpc);
   const { chainId } = await provider.getNetwork();