danfinlay

Dan Finlay Event Resources

Here are some resources you can use when listing me on your event page:

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Bio

danfinlay

• 
• 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    • Account can delegate to unpublished contracts.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.

danfinlay

• 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

danfinlay

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');

danfinlay

did:muport:QmRirsVfbq9KhAYjrTeWKBcEyTaJ6LLtjLBQkJX2cGwjQo

danfinlay

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)

danfinlay

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 }] });

danfinlay

danfinlay

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)
})

danfinlay

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)