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README.md

Hash-Time-Lock-Contract Example in Typescript using PyTeal

In this example, Bob creates an escrow account protected by a hash time lock contract:

  • Alice can withdraw funds from the account only if she will get a secret
  • to avoid locking up the funds forever, Bob can get back the funds after a specified deadline. A secret can represent a puzzle solution, or a coupon unveiled when Bob makes an action (eg receives assets or real world goods).

Read here for more information about the HTLC pattern.

Files:

  • htlc.py : It is the HTLC. SHA256 function is used for hashing.
    secret value : hero wisdom green split loop element vote belt hashed with sha256 will produce QzYhq9JlYbn2QdOMrhyxVlNtNjeyvyJc/I8d8VAGfGc= which is used in this code.
  • deploy.ts : It is used to create and fund HTLC contract account which is defined in assets/htlc.py.
  • htlc-withdraw.ts : It is used to show transactions between contract and a user.

Setup

Please follow the setup instructions to install dependencies and update the config. This example is using PyTEAL, so make sure to follow the Python3 setup described above.

Run

NOTE: Make sure to run yarn build before the following commands. yarn build compiles the typescript code to javascript (in /build). During active development use yarn build:watch to update the build in real time.

yarn run algob deploy
yarn run algob run scripts/withdraw/htlc-withdraw.ts