Build the app

Building the contract is two distinct steps. The app wraps both in npm run build:contracts, but run them by hand once so you know what each does.

Compile the contract#

From the contracts workspace, compile the Noir source to a contract artifact, that includes both the bytecode and ABI.

bash

cd packages/contracts
aztec compile

Generate the TypeScript interface#

Now turn that compiled artifact into a typed PrivateVoting class the frontend and tests import — aztec codegen reads ./target and writes ./artifacts/PrivateVoting.ts:

bash

aztec codegen ./target -o artifacts

Copy into your AI assistant

code

Run `aztec codegen ./target -o artifacts` and explain how the generated TypeScript
class maps to the Noir functions (e.g. cast_vote, get_tally), and why the artifact
must be regenerated whenever the contract or toolchain version changes.