diff --git a/apps/extension/src/rpc/index.ts b/apps/extension/src/rpc/index.ts
index 980b19ef..f80dec51 100644
--- a/apps/extension/src/rpc/index.ts
+++ b/apps/extension/src/rpc/index.ts
@@ -25,7 +25,6 @@ import { viewImpl } from '@penumbra-zone/services/view-service';
 import { createProxyImpl, noContextHandler } from '@penumbra-zone/transport-dom/proxy';
 import { onboardGrpcEndpoint } from '../storage/onboard';
 import { rethrowImplErrors } from './rethrow-impl-errors';
-import { makeTendermintProxyZeroNanos } from './tendermint-proxy';
 
 type RpcImplTuple<T extends ServiceType> = [T, Partial<ServiceImpl<T>>];
 
@@ -69,7 +68,6 @@ export const getRpcImpls = async () => {
           TendermintProxyService,
           createPromiseClient(TendermintProxyService, webTransport),
           noContextHandler,
-          makeTendermintProxyZeroNanos,
         ),
       ),
     ],
diff --git a/apps/extension/src/rpc/tendermint-proxy.ts b/apps/extension/src/rpc/tendermint-proxy.ts
deleted file mode 100644
index 7de61b24..00000000
--- a/apps/extension/src/rpc/tendermint-proxy.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import type { PromiseClient, ServiceImpl } from '@connectrpc/connect';
-import { TendermintProxyService } from '@penumbra-zone/protobuf';
-
-/**
- * This function is used to create a proxy that clobbers the nanos on the block
- * header timestamp and removes the list of commit signatures from the block.
- * Minifront doesn't use this request for anything related to consensus, so it's
- * safe for Minifront, but it may break other consumers.
- *
- * This is necessary because the CometBFT nanos field does not comply with the
- * google.protobuf.Timestamp spec, and may include negative nanos. This causes
- * failures when re-serializing the block header: bufbuild deserializes the
- * negative nanos, but refuses to re-serialize.
- *
- * Ideally,
- * - cometbft serialization should be compliant with google.protobuf.Timestamp
- * - bufbuild should provide JsonSerializationOption to disable the error
- *
- * We should explore PRing bufbuild or monkey-patching the serialization.
- */
-export const makeTendermintProxyZeroNanos = (
-  c: PromiseClient<typeof TendermintProxyService>,
-): Pick<ServiceImpl<typeof TendermintProxyService>, 'getBlockByHeight'> => ({
-  getBlockByHeight: async req => {
-    const r = await c.getBlockByHeight(req);
-    if (r.block?.header?.time?.nanos) {
-      r.block.header.time.nanos = 0;
-    }
-    if (r.block?.lastCommit?.signatures.length) {
-      r.block.lastCommit.signatures = [];
-    }
-    return r;
-  },
-});