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fix: broken links in docs [REDO] (AztecProtocol#4540)
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Redo of AztecProtocol#4539

Thanks to @krauspt

Co-authored-by: ludamad <adam@aztecprotocol.com>
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ludamad and ludamad0 authored Feb 12, 2024
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -17,7 +17,7 @@ All the packages that make up [Aztec](https://docs.aztec.network).

## Issues Board

All issues being worked on are tracked on the [Aztec Github Project](https://github.com/orgs/AztecProtocol/projects/22). For a higher-level roadmap, check the [milestones overview](https://docs.aztec.network/about_aztec/roadmap/main) section of our docs.
All issues being worked on are tracked on the [Aztec Github Project](https://github.com/orgs/AztecProtocol/projects/22). For a higher-level roadmap, check the [milestones overview](https://docs.aztec.network/misc/roadmap/main) section of our docs.

## Development Setup

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6 changes: 3 additions & 3 deletions docs/docs/learn/concepts/accounts/main.md
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Expand Up @@ -17,7 +17,7 @@ We'll start with the mandatory "what is AA" section that every single article on

### What is account abstraction?

We'll refer to AA as the _ability to set the validity conditions of a transaction programmatically_ ([source](https://fuel-labs.ghost.io/account-abstraction-for-everyone-else/)). [Starknet](https://docs.starknet.io/documentation/architecture_and_concepts/Account_Abstraction/introduction/#account_abstraction) goes one step further and splits AA into three different components:
We'll refer to AA as the _ability to set the validity conditions of a transaction programmatically_ ([source](https://fuel-labs.ghost.io/account-abstraction-for-everyone-else/)). [Starknet](https://docs.starknet.io/documentation/architecture_and_concepts/Accounts/introduction/#account_abstraction) goes one step further and splits AA into three different components:

- Signature abstraction (defining when a signature is accepted)
- Fee abstraction (paying fees)
Expand All @@ -39,15 +39,15 @@ Implementing AA at the application layer has the main drawback that it's more co

Now, there have also been multiple proposals for getting AA implemented at the _protocol_ level in Ethereum. This usually implies introducing a new transaction type or set of opcodes where signature verification and fee payment is handled by the EVM. See EIPs [2803](https://eips.ethereum.org/EIPS/eip-2803), [2938](https://eips.ethereum.org/EIPS/eip-2938), or [3074](https://eips.ethereum.org/EIPS/eip-3074). None of these have gained traction due to the efforts involved in implementing while keeping backwards compatibility.

However, other chains are experimenting with protocol-level AA. Both [Starknet](https://docs.starknet.io/documentation/architecture_and_concepts/Account_Abstraction/introduction/) and [zkSync](https://era.zksync.io/docs/dev/developer-guides/aa.html) have native AA, zkSync being the first EVM-compatible one to do so. To maintain Ethereum compatibility, zkSync implements a [default account contract](https://github.com/matter-labs/era-system-contracts/blob/main/contracts/DefaultAccount.sol) in Solidity that mimics Ethereum's protocol behavior.
However, other chains are experimenting with protocol-level AA. Both [Starknet](https://docs.starknet.io/documentation/architecture_and_concepts/Accounts/introduction/#account_abstraction) and [zkSync](https://era.zksync.io/docs/dev/developer-guides/aa.html) have native AA, zkSync being the first EVM-compatible one to do so. To maintain Ethereum compatibility, zkSync implements a [default account contract](https://github.com/matter-labs/era-system-contracts/blob/main/contracts/DefaultAccount.sol) in Solidity that mimics Ethereum's protocol behavior.

### Preventing DoS attacks

Protocol AA implementations are vulnerable to DoS attacks due to the unrestricted cost of validating a transaction. If validating a transaction requires custom logic that can be arbitrarily expensive, an attacker can flood the mempool with these transactions that block builders cannot differentiate from legit ones.

Application AA implementations face a similar issue: a smart wallet could return that a transaction is valid when a relayer is about to submit it on-chain and pay for its gas, but when the transaction is actually mined it could turn invalid.

All implementations mitigate these issues by restricting what's doable in the validation phase. EIP4337 defines a set of prohibited opcodes and limits storage access (see [Simulation](https://eips.ethereum.org/EIPS/eip-4337#simulation) in the EIP), and requires a [reputation system](https://eips.ethereum.org/EIPS/eip-4337#reputation-scoring-and-throttlingbanning-for-global-entities) for global entities. zkSync [relaxes](https://era.zksync.io/docs/dev/developer-guides/aa.html#extending-eip4337) opcode requirements a bit, and Starknet simply [does not allow to call external contracts](https://docs.starknet.io/documentation/architecture_and_concepts/Account_Abstraction/validate_and_execute/#validate_limitations).
All implementations mitigate these issues by restricting what's doable in the validation phase. EIP4337 defines a set of prohibited opcodes and limits storage access (see [Simulation](https://eips.ethereum.org/EIPS/eip-4337#simulation) in the EIP), and requires a [reputation system](https://eips.ethereum.org/EIPS/eip-4337#reputation-scoring-and-throttlingbanning-for-global-entities) for global entities. zkSync [relaxes](https://era.zksync.io/docs/dev/developer-guides/aa.html#extending-eip4337) opcode requirements a bit, and Starknet simply [does not allow to call external contracts](https://docs.starknet.io/documentation/architecture_and_concepts/Accounts/validate_and_execute/).

## Accounts in Aztec

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2 changes: 1 addition & 1 deletion docs/docs/misc/glossary.md
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Expand Up @@ -32,7 +32,7 @@ Sequencers are generally responsible for:
- Tagging the pending block with an upgrade signal to facilitate forks
- Publishing completed block with proofs to Ethereum as an ETH transaction

Previously in [Aztec Connect](https://medium.com/aztec-protocol/sunsetting-aztec-connect-a786edce5cae) there was a single sequencer, and you can find the Typescript reference implementation called Falafel [here](https://github.com/AztecProtocol/aztec-connect/tree/master/falafel).
Previously in [Aztec Connect](https://medium.com/aztec-protocol/sunsetting-aztec-connect-a786edce5cae) there was a single sequencer, and you can find the Typescript reference implementation called Falafel [here](https://github.com/AztecProtocol/aztec-connect/tree/master/yarn-project/falafel).

### Provers

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2 changes: 1 addition & 1 deletion yellow-paper/docs/public-vm/state.md
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Expand Up @@ -82,7 +82,7 @@ Each entry in the world state access trace is listed below along with its type a
## Accrued Substate

> The term "accrued substate" is borrowed from the [Ethereum Yellow Paper](https://ethereum.github.io/yellowpaper/paper).
> The term "accrued substate" is borrowed from the [Ethereum Yellow Paper](https://ethereum.github.io/yellowpaper/paper.pdf).
**Accrued substate** is accrued throughout a context's execution, but updates to it are strictly never relevant to subsequent instructions, contract calls, or transactions. An execution context is always initialized with empty accrued substate, and instructions can append to its vectors which are _append-only_. If a contract call's execution succeeds, its accrued substate is appended to the caller's. If a contract's execution reverts, its accrued substate is ignored. There is no accrued substate "trace" that includes entries from reverted contexts.

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