Dan Finlay danfinlay

Dan Finlay Event Resources

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Bio

Goal:
- An [[Ethereum]] smart account architecture composed from a very small and simple pattern of flexible delegation with maximally off-chain, low-state contracts.
Axioms / Dependencies / Prior Art / Prerequisites & Tools
- [[gnosis-safe style module]]s
  - Each module can call any function on the parent contract.
- [[create2]] deterministic addressing
  - Account can delegate to unpublished contracts.
- [[Will-o-wisps]]
Stateless delegations can clean themselves up, leaving no state-bloat on-chain.

low-level signing method
- Things that need to be done
  - Consider this kind of raw signing from security. Ask [[Christian Lundkvist]]
  - Consider drafting an EIP for this, so it can get broader security consideration.
- Code that would need to be changed
  - eth-json-rpc-middleware is a nice-to-change, although we could make a middleware just for this method.
  - It looks like eth-simple-keyring already signs arbitrary data, so the validation is not done at this level.
  - eth-keyring-controller also just passes through to the keyring, no validation.
MetaMask Controller

signTypedData Test Cases

signTypedData_v1 (aka signTypedData in the MetaMask provider)

privKey: 4af1bceebf7f3634ec3cff8a2c38e51178d5d4ce585c52d6043e5e2cc3418bb0
param: [ { type: 'string', name: 'message', value: 'Hi, Alice!' } ]
signature: 0x49e75d475d767de7fcc67f521e0d86590723d872e6111e51c393e8c1e2f21d032dfaf5833af158915f035db6af4f37bf2d5d29781cd81f28a44c5cb4b9d241531b

signTypedData_v3 (aka EIP 712 spec, aka ethSigUtil.signTypedData for bad reasons)

	Do maintenance	Pocket money
	Get paid less	Get paid more
	Maybe prevent someone else's fire	Aw it won't happen!
	Your civic duty	Worst case scenario the company goes under! you'll be fine.

CounterFactual Social Collateral Cash

A code-free introduction to a blockchain-minimized digital social collateral system.

Imagine a situation where Alice has an account with $100 in it. This is a special kind of account that allows her to give out special spending limit codes to her friends which allow them to in turn to give out their own spending-limit codes.

For example, imagine this set of signed messages:

“Bob may withdraw up to $100 from my account” - Alice, signed 5/8/2018
“Carol may withdraw up to $50 of my allowance from Alice” - Bob, signed 7/6/2018 (includes reference to previous Alice message)

	const funcString = '() => "foo"';
	const funcA = new Function(funcString);
	const funcB = new Function(funcString);

	const map = new Map();
	map.set(funcA, 'a');
	map.set(funcB, 'b');
	const aVal = map.get(funcA);
	console.log(aVal === 'a');

	const requestedPermissions = {
	eth_accounts: {},
	eth_sendTransaction: {},
	eth_decrypt: {},
	};

	async function main () {
	const provider = window.ethereum
	await provider.enable({ requestedPermissions });
	await provider.send({ method: 'eth_sendTransaction', parameters:[{ to: me, value: aModestSum }] });



	console.log('plugin loaded!')
	window.parent.postMessage('PLUGIN ping', '*', false)

	window.addEventListener('message', function (e) {
	console.log('PLUGIN RECEIVED', e )
	window.parent.postMessage('PLUGIN pong', '*', false)
	})