feat: Context and Proxy Starknet contract integration into Calimero

[alenmestrov]

Integrate Starknet Blockchain integration into Calimero

Summary

Implemented logic for communicating with Starknet smart contracts (both Context and Proxy contracts).
The implementation was done based on NEAR integration. For some cases we needed to include custom logic for casting from NEAR to Starknet and vice versa.

Test plan

Setup of devnet environment and preparation of contracts can be found in these two repositories:
Context contract
Proxy contract

1. Initialize the node with additional flag --protocol starknet

cargo run -p merod -- --node-name starknet --home data init --server-port 2428 --swarm-port 2528 --protocol starknet

2. After initialization go to Config.toml file in node directory and adjust the values there to use devnet environment.

[context.config.new]
protocol = "starknet"
network = "sepolia"
contract_id = "HERE_INSERT_CONTEXT_CONTRACT_ADDRESS"

3. Set context.config.signer use value to self

[context.config.signer]
use = "self"

4. Adjust signer details:

[context.config.signer.self.starknet.sepolia]
rpc_url = "http://127.0.0.1:5050/rpc"
account_id = "USE_ONE_OF_DEVNET_ACCOUNT_ADDRESSES"
public_key = "ACCOUNT_PUBLIC_KEY"
secret_key = "ACCOUNT_SECRET_KEY"

5. Start the node

cargo run -p merod -- --node-name starknet --home data run

6. Setup Demo Blockchain application
   Repository

7. In first node install application wasm, create context, then initalize one more node on different ports, and add that node to context created in first node.
   Steps are explained here

8. Start Demo blockchain app frontend, connect to nodes through Admin Dashboard

9. Create demo proposal and approve proposal on different node

10. Results should be visible on both nodes

[miraclx]

same