chore: port sell contract to .ts

[dckc]

DRAFT

• get the test to run
• try out the whole dapp

[dckc]

I'm struggling to get the test to run:

~/projects/dapp-agoric-basics/contract$ yarn test test/test-sell-concert-tickets-contract.js 
yarn run v1.22.22
$ ava --verbose test/test-sell-concert-tickets-contract.js

  Uncaught exception in test/test-sell-concert-tickets-contract.js

  TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /home/connolly/projects/dapp-agoric-basics/contract/src/sell-concert-tickets.contract.ts

  ✘ test/test-sell-concert-tickets-contract.js exited with a non-zero exit code: 1

[mhofman]

What version of Node are you using. I think we have some rough edges because Node's .ts support was adding in 22.6 and unflagged in 23.6, but we only support up to Node 20 currently (which requires a flag). So I think we need to tell ava to use the ts-blank-space loader. Example: https://github.com/Agoric/agoric-sdk/blob/9db2909eafccc0d8df19258508ec58966e3eb3f8/packages/boot/package.json#L88

[dckc]

I'm using node 20.
I've seen conflicts between node 22 and @agoric/zoe.

So I think we need to tell ava to use the ts-blank-space loader.

Right. thanks for the pointer.