PalletHtlc

Problem Statement

The current project implement a Substrate FRAME pallet that implements hashed timelock contracts (HTLCs) that can be used to facilitate cross chain swaps.The Substrate pallet, follows the logic of the cross-chain-swap: https://github.com/1inch/cross-chain-swap smart contracts by 1inch. The core logic of the pallet handles both EscrowSrc and EscrowDst contracts as well as ways to withdraw assets from them and cancel them.1inch Fusion+ cross chain swaps utilize both the cross-chain-swap smart contracts and the limit-order-protocol smart contracts: https://github.com/1inch/limit-order-protocol/tree/master/contractsFor the purposes of this proof-of-concept there are many simplifications that need to be explored further. Currently, makers (actors) who want to swap across chains, need to create a SwapIntent and there is no Dutch auction implemented to run as the one implemented in the limit-order-protocol smart contracts.

Solution

This project is a Substrate-based FRAME pallet https://paritytech.github.io/polkadot-sdk/master/polkadot_sdk_docs/polkadot_sdk/frame_runtime/index.htmlThe pallet is implemented in Rust and can be used by any Substrate-based blockchain or parachain and the intended target is to be used by Polkadot or Polkadot's AssetHub to facilitate cross-chain swaps.