⚠️ This project was created as a proof of concept for an article in 2020. It served its

⚠️ purpose. It was occasionally updated but does not belong to any actively maintained software

⚠️ stack. It’s archived now to highlight that no changes are done here anymore and no contributions

⚠️ are accepted. It is likely insecure. Also please note that this code is licensed under AGPL which

⚠️ might be a problem for when you want to use it. The story of drand verificartion in CosmWasm

⚠️ is continued at Nois.

Rand – A drand client as a CosmWasm smart contract

To learn more about this project, see this article: https://medium.com/confio/when-your-blockchain-needs-to-roll-the-dice-ed9da121f590

Development build

Some fast checks

cargo fmt && cargo unit-test && cargo check --tests && cargo schema && cargo clippy -- -D warnings

Integratin tests

cargo wasm && cargo integration-test

Run in singlepass

In order to measure gas consumption, singlepass tests need to be used. E.g.

cargo wasm
cargo integration-test --no-default-features verify_valid -- --nocapture

Production build

docker run --rm -v "$(pwd)":/code \
  --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
  --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
  cosmwasm/rust-optimizer:0.12.5

License

A drand client in a smart contract for CosmWasm.
Copyright (C) 2020 Confio OÜ
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses></http:>.