call-contract-gas-estimation

Call Contract Gas Estimation Example

This example demonstrates how to relay a message from a source-chain to a destination-chain.

Prerequisite

Make sure you've already followed the following steps:

• Setup environment variables
• Run the local chains

Deployment

To deploy the contract, use the following command:

npm run deploy evm/call-contract-gas-estimation [local|testnet]

The aforementioned command pertains to specifying the intended environment for a project to execute on. It provides the option to choose between local and testnet environments by appending either local or testnet after the command.

An example of its usage is demonstrated as follows: npm run deploy evm/call-contract-gas-estimation local or npm run deploy evm/call-contract-gas-estimation testnet.

Test

cd into evm folder Run the command npx hardhat test call-contract-gas-estimation/tests/call-contract-gas-estimation.test.js

Execution

To execute the example, use the following command:

npm run execute evm/call-contract-gas-estimation [local|testnet] ${srcChain} ${destChain} ${message}

Parameters

• srcChain: The blockchain network from which the message will be relayed. Acceptable values include "Moonbeam", "Avalanche", "Fantom", "Ethereum", and "Polygon". Default value is Avalanche.
• destChain: The blockchain network to which the message will be relayed. Acceptable values include "Moonbeam", "Avalanche", "Fantom", "Ethereum", and "Polygon". Default value is Fantom.
• message: The message to be relayed between the chains. Default value is "Hello World".

Example

This example deploys the contract on a local network and relays a message "Hello World" from Moonbeam to Avalanche.

npm run deploy evm/call-contract-gas-estimation local
npm run execute evm/call-contract-gas-estimation local "Fantom" "Avalanche" "Hello World"

The output will be:

--- Initially ---
value at Avalanche is
--- After ---
value at Avalanche is Hello World