caspersign-contract

This is a part of the CasperSign project.
🗞 https://twitter.com/Casper_Network/status/1392482766139363328

This repository holds the smart contract used by the application.

Based on https://github.com/casper-ecosystem/kv-storage-contract (detailed description of the source contract can be found here: https://docs.casperlabs.io/en/latest/dapp-dev-guide/tutorials/kv-storage-tutorial.html)

The contract has been deployed to mainnet here: https://cspr.live/deploy/58a2cb73bf3f73249f296af7a5bd8338ac9bc55cab0eae484c810ab675d70d85

Project overview

The CasperSign project consists of the following repositories:

• https://github.com/chronologic/caspersign-app-ui
• https://github.com/chronologic/caspersign-validator-ui
• https://github.com/chronologic/caspersign-signer-ui
• https://github.com/chronologic/caspersign-server
• https://github.com/chronologic/caspersign-contract (this repository)

Setup

Refer to this guide to set up your environment: https://docs.casperlabs.io/en/latest/dapp-dev-guide/setup-of-rust-contract-sdk.html

Building

Run make build-contract

Deployment

Follow this guide to set up casper-client: https://docs.casperlabs.io/en/latest/dapp-dev-guide/deploying-contracts.html and then run:

casper-client put-deploy \
  --chain-name <chain_name> \
  --node-address <node_url> \
  --secret-key <path_to_secret_key> \
  --session-path ./target/wasm32-unknown-unknown/release/contract.wasm  \
  --payment-amount <amount_to_pay_for_deployment>

Interacting with the contact

Storing signature in the contract

casper-client put-deploy \
  --chain-name casper-test \
  --node-address <node_url> \
  --secret-key <path_to_secret_key> \
  --session-name caspersign_contract \
  --session-entry-point store_signature \
  --session-arg="hash:string='<storage_key>'" \
  --session-arg="signature:string='<signature>'" \
  --payment-amount <amount_to_pay_for_deployment>

Querying state

First, you need to get state root hash:

casper-client get-state-root-hash --node-address <node_url>

Then you need to find out what under what hash key the contract was stored in the deployed account:

casper-client query-state \
  --node-address <node_url> \
  --key <deployer_account> \
  --state-root-hash <state_root_hash>

Look for key value associated with the name caspersign_contract, e.g.:

{
    "key": "hash-sjfskdfjsdklfjsdklfjsdkfjsd",
    "name": "caspersign_contract"
},

Then you can query the contract for signatures:

casper-client query-state \
    --node-address <node_url> \
    --state-root-hash <state_root_hash> \
    --key <caspersign_contract_hash_key> \
    --query-path <storage_key>