feat: control networks with ENABLED_NETWORKS env

Now you can use ENABLED_NETWORKS to decide what networks should
be added.

apps/api/src/config.ts

@@ -1,3 +1,11 @@
+/**
+ * Array of enabled networks. Can be defined using ENABLED_NETWORKS environment variable
+ * with comma-separated list of network names.
+ */
+export const ENABLED_NETWORKS = process.env.ENABLED_NETWORKS
+  ? process.env.ENABLED_NETWORKS.split(',')
+  : null;
+
 /** Infura API key used by default for network nodes. */
 export const DEFAULT_INFURA_API_KEY =
   process.env.INFURA_API_KEY || '46a5dd9727bf48d4a132672d3f376146';

apps/api/src/evm/index.ts

@@ -1,6 +1,7 @@
 import Checkpoint, { evm } from '@snapshot-labs/checkpoint';
 import { createConfig } from './config';
 import { createWriters } from './writers';
+import { registerIndexer } from '../register';
 
 const ethConfig = createConfig('eth');
 const sepConfig = createConfig('sep');
@@ -17,10 +18,15 @@ const arb1Indexer = new evm.EvmIndexer(createWriters(arb1Config));
 const baseIndexer = new evm.EvmIndexer(createWriters(baseConfig));
 
 export function addEvmIndexers(checkpoint: Checkpoint) {
-  checkpoint.addIndexer(ethConfig.indexerName, ethConfig, ethIndexer);
-  checkpoint.addIndexer(sepConfig.indexerName, sepConfig, sepIndexer);
-  checkpoint.addIndexer(oethConfig.indexerName, oethConfig, oethIndexer);
-  checkpoint.addIndexer(maticConfig.indexerName, maticConfig, maticIndexer);
-  checkpoint.addIndexer(arb1Config.indexerName, arb1Config, arb1Indexer);
-  checkpoint.addIndexer(baseConfig.indexerName, baseConfig, baseIndexer);
+  registerIndexer(checkpoint, ethConfig.indexerName, ethConfig, ethIndexer);
+  registerIndexer(checkpoint, sepConfig.indexerName, sepConfig, sepIndexer);
+  registerIndexer(checkpoint, oethConfig.indexerName, oethConfig, oethIndexer);
+  registerIndexer(
+    checkpoint,
+    maticConfig.indexerName,
+    maticConfig,
+    maticIndexer
+  );
+  registerIndexer(checkpoint, arb1Config.indexerName, arb1Config, arb1Indexer);
+  registerIndexer(checkpoint, baseConfig.indexerName, baseConfig, baseIndexer);
 }

apps/api/src/register.ts

@@ -0,0 +1,16 @@
+import Checkpoint, {
+  BaseIndexer,
+  CheckpointConfig
+} from '@snapshot-labs/checkpoint';
+import { ENABLED_NETWORKS } from './config';
+
+export function registerIndexer(
+  instance: Checkpoint,
+  indexerName: string,
+  config: CheckpointConfig,
+  indexer: BaseIndexer
+) {
+  if (ENABLED_NETWORKS && !ENABLED_NETWORKS.includes(indexerName)) return;
+
+  instance.addIndexer(indexerName, config, indexer);
+}

apps/api/src/starknet/index.ts

@@ -1,6 +1,7 @@
 import Checkpoint, { starknet } from '@snapshot-labs/checkpoint';
 import { createConfig } from './config';
 import { createWriters } from './writers';
+import { registerIndexer } from '../register';
 
 const snConfig = createConfig('sn');
 const snSepConfig = createConfig('sn-sep');
@@ -9,6 +10,11 @@ const snIndexer = new starknet.StarknetIndexer(createWriters(snConfig));
 const snSepIndexer = new starknet.StarknetIndexer(createWriters(snSepConfig));
 
 export function addStarknetIndexers(checkpoint: Checkpoint) {
-  checkpoint.addIndexer(snConfig.indexerName, snConfig, snIndexer);
-  checkpoint.addIndexer(snSepConfig.indexerName, snSepConfig, snSepIndexer);
+  registerIndexer(checkpoint, snConfig.indexerName, snConfig, snIndexer);
+  registerIndexer(
+    checkpoint,
+    snSepConfig.indexerName,
+    snSepConfig,
+    snSepIndexer
+  );
 }