Pay fees via FPC publicly during account contract initialization #5544
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alexghr
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Apr 10, 2024
This PR enables accounts to pay tx fees when they're deployed. To achieve this a new deployment method was added that's used by the `AccountManager` class to optionally register/publicly deploy and initialize the target account contract. Entrypoint classes now accept authwits/packed arguments alongside the normal function calls from before. This is needed so that authwits could be created in a parent context and then passed along as transient authwits to the transaction (see `ExecutionRequestInit` wrapper type) Initializing an account contract can use any of the three existing payment methods: - using bridged gas token from L1 - paying privately through a fee payment contract - paying publicly through a fee payment contract In order to use fee payment contracts this PR adds `noinitcheck` to `spend_private_authwit` and `spend_public_authwit` because it's not possible to read the init nullifier in the current tx (protocol limitation). Instead the contract relies on the note containing the public key to exist to validate that the contract has been initialized correctly. An extra payment flow is tested as well: a third party takes the account's public keys and deploys and initializes the account while paying the associated fee. This simulates the flow where a deployment service is used that takes payment through a side chain (e.g. fiat). Breaking change: moved `DefaultMultiCallEntrypoint` to aztec.js This PR supersedes #5540 and #5543. Fix #5190 #5191 #5544.
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