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Configure Foundry

Foundry is a blazing fast, portable,modular toolkit for Ethereum application development written in Rust.

Introduction​

This page details several parameters required to configure Foundry. The Foundry framework isn't described here; find that in the Foundry documentation.

Prerequisites​

  • cURL

Foundry configuration​

Unlike other toolkits, Foundry doesn't have a config file to hold the chain parameters, instead, parameters are passed into commands.

  1. The following command deploys a contract using a script:
forge script script/TestERC20/DeployTestERC20.s.sol:DeployTestERC20Script --broadcast --rpc-url $RPC_URL_DEVNET --legacy --skip-simulation

The parameters for forge script command include:

  • --rpc-url: RPC URL
  • --skip-simulation: This parameter skips the on-chain simulation which doesn't work on Neon EVM.
  • --broadcast: This parameter broadcasts the transaction.
  • --legacy: This parameter is being passed to use legacy transactions (Neon EVM currently doesn't support EIP-1559 transactions)
  1. The following command deploys a contract directly without a script:
forge create --rpc-url $RPC_URL_DEVNET \
--private-key $PRIVATE_KEY \
--constructor-args "Test ERC20 Token" "TERC20" --legacy \
src/TestERC20/TestERC20.sol:TestERC20

The parameters for forge create command include:

  • --rpc-url: RPC URL
  • --private-key: The private key of the transaction signer
  • --constructor-args: The constructor arguments to be passed to the contract that is being deployed
  • --legacy: This parameter is being passed to use legacy transactions (Neon EVM currently doesn't support EIP-1559 transactions)
  1. The following command fetches the total supply of wNEON from Neon Mainnet contract:
$ cast call --rpc-url https://neon-proxy-mainnet.solana.p2p.org/ 0x202C35e517Fa803B537565c40F0a6965D7204609 "totalSupply()" --trace

This will output the result as:

Traces:
  [327] 0x202C35e517Fa803B537565c40F0a6965D7204609::totalSupply()
    └─ ← [Return] 0x000000000000000000000000000000000000000000007df4c0bc89d9a1ce65b6

Transaction successfully executed.
Gas used: 21391

The parameters for forge create command include:

  • --rpc-url: RPC URL
  • --trace: Flag used to display the stack trace of the function call
important

--trace flag is mandatory for the cast call command to get the result of the function call.

What next? See the tutorial on how to use Foundry to deploy on Neon EVM.​

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