jtriley-eth

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title Simple read-write contract written in Solidity
/// @author jtriley.eth
/// @notice This is designed to be functionally identical to ./YulContract.sol
/// This is for educational purposes only, do not use in production.
contract SolidityContract {

    /// @notice emitted when _myNumber is set

jtriley-eth

/// @title Simple read-write contract written in Yul
/// @author jtriley.eth
/// @notice This is designed to be functionally identical to ./SolidityContract.sol
/// This is for educational purposes only, do not use in production.
object "YulContract" {
    code {
        /// @dev Deploys the contract
        datacopy(0, dataoffset("runtime"), datasize("runtime"))
        return (0, datasize("runtime"))
    }

jtriley-eth

import { Framework } from '@superfluid-finance/sdk-core'
import { ethers } from 'ethers'

// extracted from `./.env`
const apiKey = process.env.API_KEY
const privateKey = process.env.PRIV_KEY

// intializing
const provider = new ethers.providers.InfuraProvider('matic', apiKey)
const sf = await Framework.create({ networkName: 'matic', provider })

jtriley-eth

MetaStreamCloser

Abstract

The MetaStreamCloser contract allows a user to provide a digital signature, giving permission to a third party to close streams on the user's behalf. A stream's sender or receiver may propmt the contract for a message to sign, the message being a deleteFlow function call. By generating a signature and sending it to a third party, that third party has access to explicitly delete the unique flow of a token between the sender and receiver exactly once.

jtriley-eth

interface IForwarder {
	/// @dev Full ERC20 Forward Request, Not all fields are relevant
	/// @param from Account that signs the metatransaction (sender)
	/// @param to Target address to execute function call (Superfluid host)
	/// @param token Token to collect meta-tx fees in (not applicable)
	/// @param txGas Gas provided for call execution
	/// @param tokenGasPrice Token amount for meta-tx fee (not applicable)
	/// @param batchId Unique ID of meta-tx batch
	/// @param batchNonce Nonce unique to `from` and `batchId`
	/// @param deadliine Execution deadline timestamp (zero for no deadline)

jtriley-eth

Biconomy Function Signatures

// ---------------------------------- //
// signature
"getNonce(address,uint256)"

// keccak256 hash
0x895358038f2a11adf6dc83f52acf8e031067227760d4efa3d9a55399e3a98616

jtriley-eth

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title Interface extracted from Biconomy Source Code.
/// @author jtriley.eth
/// @notice This allows us to interface with the Trusted Forwarder contract that
///         will call the respective functions on the Superfluid host.
interface IForwarder {

    /// @dev Full ERC20 Forward Request, Not all fields are relevant

jtriley-eth

The Sentinel

Abstract

There is an increasing need for off-chain infrastructure in the Supefluid ecosystem as more projects, protocols, and individuals need to interact with contracts in complex, scheduled, or automated ways. This includes, but is not limited to, insolvent stream liquidation, pre-insolvency courtesy stream closures, scheduled transactions, and meta transactions.

jtriley-eth

jtriley-eth

// --snip--

_host.callAgreement(
	_cfa,
	abi.encodeWithSelector(
		_cfa.createFlow.selector,
		token,
		receiver,
		flowRate,
		new bytes(0)