server to server calls + node-fetch

[darkship]

Hello,

I use a trpc client to make server (express5) to server (fastify4 + trpc) calls. There are cases where it works but they are mostly getting stuck and calls never finish despite fastify4's successful answer.

To fix that I found out that I can customise the fetch and use node-fetch IF i ignore the typescript error.

Is that a bug? Shouldn't it be working out of the box? Shouldn't node-fetch be compatible?

I will try to make a reproducible project

System:
OS: Linux 6.8 Linux Mint 22.1 (Xia)
Binaries:
Node: 22.16.0 - ~/.nvm/versions/node/v22.16.0/bin/node
npm: 10.9.2 - ~/.nvm/versions/node/v22.16.0/bin/npm
pnpm: 10.13.1 - ~/.nvm/versions/node/v22.16.0/bin/pnpm
Watchman: 4.9.0 - /usr/bin/watchman
Browsers:
Chromium: 138.0.7204.168
npmPackages:
@trpc/client: ^11.4.3 => 11.4.3
@trpc/server: ^11.4.2 => 11.4.3
typescript: ^5.8.3 => 5.8.3