const data = [
{ id: 1,
name: 'Fabio Berger + Remco Bloemen',
content: '\n' +
'Fabio\n' +
'Berger + Remco Bloemen
\n' +
'\n' +
'\n' +
'- What type of apps do you\n' +
'build?
\n' +
'
\n' +
'\n' +
'- 0x - Decentralized exchange\n' +
'protocol. It is a set of smart contracts that handle standard\n' +
'transactions in an order format.
\n' +
'
\n' +
'\n' +
'- The key advantage here is that\n' +
'these smart contracts leads to shared liquidity
\n' +
'
\n' +
'\n' +
'- We also achieve increased security\n' +
'and network liquidity through our architecture.
\n' +
'- We launched the network in August\n' +
'2017.
\n' +
'
\n' +
'\n' +
'- It works, but is V1. We are working\n' +
'on V2 which helps people build hybrid stations, supports new token\n' +
'standards, and makes the contract more gas efficient.
\n' +
'- V1 only allows humans to create\n' +
'orders; V2 will allow new smart contract to create orders. This is\n' +
'HUGE.
\n' +
'
\n' +
'\n' +
'- Notes:
\n' +
'
\n' +
'\n' +
'- We’re building the protocol;\n' +
'designing the standard; building dev tools for anyone to build a\n' +
'decentralized exchange.
\n' +
'
\n' +
'\n' +
'- Orders may become invalid for any\n' +
'reason:
\n' +
'
\n' +
'\n' +
'- Order being filled
\n' +
'- Griefing attacks
\n' +
'- We’ve now built an OrderWatcher\n' +
'that keeps relayers updated on the state of orders.
\n' +
'
\n' +
'\n' +
'- We’re using contract Events as a\n' +
'proxy for state changes.
\n' +
'- Can do a diff between state trees\n' +
'and between block headers.
\n' +
'
\n' +
'\n' +
'- We also have a set of smart\n' +
'contracts to handle settlement;
\n' +
'
\n' +
'\n' +
'- Everyone who wants to trade is\n' +
'setting allowances on a smart contract.
\n' +
'
\n' +
'\n' +
'- We want upgradability.
\n' +
'
\n' +
'\n' +
'- What are the\n' +
'tools/libraries/frameworks you use?
\n' +
'
\n' +
'\n' +
'- EthereumJS / truffle hardwallet\n' +
'provider / Typedoc (to generate documentation) /
\n' +
'- We don’t use Truffle\n' +
'anymore
\n' +
'
\n' +
'\n' +
'- Not reliable – can have race\n' +
'conditions;
\n' +
'- Artifacts don’t allow you to have\n' +
'versions of the contract on different networks
\n' +
'
\n' +
'\n' +
'- You don’t run into this stuff if\n' +
'you’re just building a “hello world”
\n' +
'
\n' +
'\n' +
'- Overwriting parts of the\n' +
'contracts;
\n' +
'
\n' +
'\n' +
'- We rolled our own. It’s open-source\n' +
'but not documented. We have other things that are keeping us\n' +
'busy.
\n' +
'- The problem is that Truffle has too\n' +
'much functionality –– we would like to see more of a Unix\n' +
'philosophy.
\n' +
'- Cannot support different versions\n' +
'of Solidity.
\n' +
'
\n' +
'\n' +
'- Version management doesn’t\n' +
'exist.
\n' +
'
\n' +
'\n' +
'- EthPM –– doesn’t have versioning\n' +
'either? It’s going through a big refactor, so we held off. We need\n' +
'the NPM package manager.
\n' +
'- We have built a lot of developer\n' +
'tools to interface with the smart contracts ourselves.
\n' +
'- We have also built own deployer and\n' +
'migration tool, as truffle’s did not suit our needs.
\n' +
'
\n' +
'\n' +
'- What are your biggest\n' +
'frustrations?
\n' +
'
\n' +
'\n' +
'- Getting a simple experimental\n' +
'environment up is hard
\n' +
'
\n' +
'\n' +
'- Remix is there; but it’s not\n' +
'enough.
\n' +
'
\n' +
'\n' +
'- Tracing and profiling is not\n' +
'existent.
\n' +
'
\n' +
'\n' +
'- Remix does it, but can’t do it\n' +
'locally.
\n' +
'- “Code coverage” tool exists but\n' +
'inserts console.logs in
\n' +
'
\n' +
'\n' +
'- Adding up gas costs per line of\n' +
'code.
\n' +
'
\n' +
'\n' +
'- Need to do profiling, because gas\n' +
'costs depend on inputs.
\n' +
'
\n' +
'\n' +
'- Solidity language\n' +
'itself:
\n' +
'
\n' +
'\n' +
'- Crashed the Solidity compiler twice\n' +
'today.
\n' +
'
\n' +
'\n' +
'- E.g. AbiEncoderV2 is pretty new and\n' +
'hard to understand/use.
\n' +
'
\n' +
'\n' +
'- The code that it produces is\n' +
'inefficient.
\n' +
'- There is a stark stack limit in\n' +
'solidity
\n' +
'
\n' +
'\n' +
'- All the variables are locally\n' +
'scoped.
\n' +
'- Un-intuitive as it is a curly\n' +
'braced language.
\n' +
'- The lifecycle hook value_of is\n' +
'within a function.
\n' +
'- Can only access top 16 slack slots.\n' +
'Including input and output.
\n' +
'- We need to implement a graph\n' +
'coloring register allocator – to find out what the lifetime of the\n' +
'variables is.
\n' +
'
\n' +
'\n' +
'- “This stack slot was used in the\n' +
'first half –– the second half you can use”
\n' +
'- Or implement register\n' +
'splitting.
\n' +
'
\n' +
'\n' +
'- Function inlining is frustrating\n' +
'sometimes:
\n' +
'
\n' +
'\n' +
'- E.g. SafeMath –– turns every\n' +
'operator into function call – which is a huge gas sink.
\n' +
'
\n' +
'\n' +
'- How Solidity optimizes could be\n' +
'improved:
\n' +
'
\n' +
'\n' +
'- It focuses on the code size (which\n' +
'makes sense since it’s minimizing the state tree); but sometimes\n' +
'you need to optimize size of tx gas (e.g. 0x needs optimized\n' +
'fillOrder call)
\n' +
'
\n' +
'\n' +
'- ABI doesn’t implement\n' +
'introspection
\n' +
'
\n' +
'\n' +
'- EIP 165
\n' +
'
\n' +
'\n' +
'- E.g. “does this contract implement\n' +
'ERC20, or ERC223?”
\n' +
'
\n' +
'\n' +
'- Solidity should have this\n' +
'in-built.
\n' +
'
\n' +
'\n' +
'- Should be built into the API spec\n' +
'and compiler.
\n' +
'
\n' +
'\n' +
'- Inheritance:
\n' +
'
\n' +
'\n' +
'- Interface or abstract contract –\n' +
'e.g. Solidity automatically creates getters for state functions ––\n' +
'collides with
\n' +
'- Contract which implements an\n' +
'interface – public or external for abstract functions – they\n' +
'collide
\n' +
'
\n' +
'\n' +
'- ERCs – there is not a formal way to\n' +
'describe the interface for contracts.
\n' +
'
\n' +
'\n' +
'- Have a standard repo –– this will\n' +
'lead to a canonical ABI definition –– can have semantic rules\n' +
'around this. Could run some specific unit tests against
\n' +
'
\n' +
'\n' +
'- How do you handle\n' +
'testing?
\n' +
'
\n' +
'\n' +
'- Testrpc has gotten better\n' +
'––
\n' +
'
\n' +
'\n' +
'- Increases the speed at which you\n' +
'can dev.
\n' +
'
\n' +
'\n' +
'- Blockstream is really cool. Written\n' +
'by Mica (from Augur?), under the EthereumJS lib.
\n' +
'- Good dealing with block re-orgs and\n' +
'changes in state.
\n' +
'- Continuous Integration:
\n' +
'
\n' +
'\n' +
'- Doesn’t really work for smart\n' +
'contracts.
\n' +
'- We just use testrpc.
\n' +
'- Neufund was different than\n' +
'0x:
\n' +
'
\n' +
'\n' +
'- Neufund was a trustee for tokens ––\n' +
'it was centralized by definition.
\n' +
'- This made it simpler: I could\n' +
'create “open-ended” contracts –– a switch statement, that the\n' +
'default would send to another proxy contract.
\n' +
'- But wouldn’t be able to do this\n' +
'with 0x –– e.g. if we wanted to add Shnorr signatures –– because\n' +
'it’s a governance / security issues.
\n' +
'
\n' +
'\n' +
'- How do you handle smart contract\n' +
'verification and security?
\n' +
'
\n' +
'\n' +
'- Code audits before\n' +
'deployment
\n' +
'- Want to add a formal verification\n' +
'tool to our deployment tool.
\n' +
'
\n' +
'\n' +
'- By analyzing the code, you can find\n' +
'patterns.
\n' +
'
\n' +
'\n' +
'- I manually did an audit in v0 of\n' +
'0x:
\n' +
'
\n' +
'\n' +
'- Make sure all functions have a\n' +
'“Read -> Write -> External Call” pattern, so you don’t have\n' +
'any race conditions.
\n' +
'
\n' +
'\n' +
'- Other bounties?
\n' +
'
\n' +
'\n' +
'- Rest of the bounties from\n' +
'Remco
\n' +
'- State-watching –– built-in\n' +
'diff’ing of state trees
\n' +
'
\n' +
'\n' +
'- Should be implemented in the\n' +
'Ethereum clients – Geth and Rust.
\n' +
'- They want this feature for\n' +
'OrderWatcher.
\n' +
'
\n' +
'\n' +
'- EIP process is\n' +
'suboptimal:
\n' +
'
\n' +
'\n' +
'- Lacks in consensus-building.\n' +
'There’s vocal people who don’t have good ideas; there’s a lot of\n' +
'noise.
\n' +
'- To improve: committee-based\n' +
'approach (reputable stakeholders from reputable projects who get\n' +
'together?).
\n' +
'- Problems are getting solved at the\n' +
'wrong abstraction level.
\n' +
'
\n' +
'\n' +
'- E.g. NFT standards.
\n' +
'
\n' +
'\n' +
'- Neufund was largest Solidity\n' +
'project before –– tokenized equity.
\n' +
'
\n' +
'\n' +
'- You want a EuroToken. You don’t\n' +
'want your company valuated in Ether.
\n' +
'- What if blockchain forks; which\n' +
'token is actually tied to the company?
\n' +
'
\n' +
'\n' +
'- Bounty approach gives many\n' +
'different styles within the codebase.
\n' +
'
\n' +
'\n' +
'- This is a problem; e.g. OpenSSL\n' +
'codebase after Masters / PhDs.
\n' +
'
\n' +
'',
},
];
export default data;