Casper / Casper Association | Writing On-Chain Code

In this video, we will see how to call contracts using session arguments.

The Casper client put-deploy command allows you to do this with the --session-arg option.

Reference documentation:
https://docs.casperlabs.io/dapp-dev-guide/writing-contracts/calling-contracts/#calling-contracts-with-session-args

Reference contract code:
https://github.com/casper-ecosystem/counter/tree/count_inc_with_args
The command used in this example to call a contract using arguments is:
casper-client put-deploy \
--node-address http://135.181.208.231:7777 \
--chain-name casper-test \
--secret-key /Users/iulia/KEYS/secret_key.pem \
--payment-amount 100000000 \
--session-hash hash-cc752f2cc0eb235dc17294b4368cbba3735a7ea5260ac45155473ea5971c1bef \
--session-entry-point "counter_inc" \
--session-arg "amount:i32='20'"

In this video, we discuss session code, which is the simplest piece of logic you can execute on a Casper network.

It requires only one entry point, the call function, and it runs within the context of the account executing the session code.

o Sample session code that configures an account on a Casper network to require two-party multi-signature deploys: https://github.com/casper-ecosystem/two-party-multi-sig/

o Reference documentation: https://docs.casperlabs.io/dapp-dev-guide/writing-contracts/session-code/

As part of the Casper Rust development environment, we provide a testing framework.

This video describes testing session code using the Casper testing framework without running a full node.

o Sample session code and tests: https://github.com/casper-ecosystem/two-party-multi-sig/

o Reference documentation: https://docs.casperlabs.io/dapp-dev-guide/writing-contracts/testing-session-code/

In this video, we introduce a simple smart contract that we install on the Casper Testnet.

To follow along, you can clone the repository of this simple contract that maintains a counter variable.

o Sample contract code: https://github.com/casper-ecosystem/counter

o Reference documentation: https://docs.casperlabs.io/dapp-dev-guide/writing-contracts/rust/