CrowdFund dApp a la kickstarter

[dckc]

Description: a smart contract and web user interface for crowdfunding: given a funding target and a deadline, accept pledges. Allow the proposer to collect once the funding target is met. Allow refund of pledges if the deadline has passed and the target is not met.

Motivation/Impact/Importance: foster a market of projects facilitated by RChain

Completion/Success Criteria: demo of dApp web UI deployed and connected to testnet ; source code published under Apache 2 license

Bonus points:

• mainnet deployment with an actual project funding
• portability any ERTP-style token

Link to specs and additional info :

• feat: CrowdFund with RevVault issuer purses deployed to testnet rchain-community/rgov#19 - CrowdFund contract sketch
• RChain APIs and dev tools:
  • https://developer.rchain.coop/rnode-api - rnode web API
  • Voting in Rholang shows rholang basics
• https://agoric.com/documentation/ertp/guide/ - ERTP guide (javascript; concepts apply to rholang as well)
• https://github.com/dckc/awesome-ocap
  how to make a contract that executes on receipt of REV? rchip-proposals#31 how to make a contract that executes on receipt of REV?
  https://agoric.com/documentation/ertp/guide/

Mentors: @dckc (@jimscarver ?)

Skills: rholang, web app development, object capabilities

RChain Priority:

[dckc]

looks like a version of this is done: https://github.com/fabcotech/dapp-tipboard

[dckc]

kickstarter project: Bubblegum Volume 2 Anthology Book by JUMBO PRESS — Kickstarter

start with the python app part:

• a page / form for anyone to become a potential "beneficiary" by starting a crowdfunding project: title, deadline, funding target
  • a button for "claim reward"
• a page for anyone to browse existing projects, showing title, deadline, funding target
  • each with a link to a page for anyone to "contribute" with an amount
    • a page for a contributor to "please refund my contribution"

then we can work on using rchain / rholang / rspace as the "database" side
make sure you've seen the RhoVM talk , at least the part starting at 5 minutes ending at about 15 minutes.

The contract sketch so far is:

• CrowdFund.rho sketch
  • raw CrowdFund.rho is good for pasting into a rholang playground with auto-indent support
  • of course, vs-code with the rholang extension is better for editing rholang

slide about new x in { ...} in rholang , part of a crash-course in rholang: recording, blog item

[dckc]

The contract part is working, though only lightly tested: rchain-community/rgov#19