Ethereum-Solidity Quiz Q32: What transaction types are used in Ethereum?

Source: Dev.to

Transaction Types

1. CREATE – Deploy contract (address depends on deployer + nonce)
2. CREATE2 – Deploy contract (address is deterministic/predictable)
3. CALL – Call a function on an existing contract
4. DELEGATECALL – Call using the caller’s storage (used by proxies internally)

Regular contract deployment

new MyContract(arg1, arg2);

{
  "transactionType": "CREATE",
  "to": null,
  "contractAddress": "0x..."
}

Deterministic deployment via factory

// Foundry does this automatically for libraries

{
  "transactionType": "CREATE2",
  "to": "0x4e59b448...",
  "contractAddress": "0x..."
}

Function call on existing contract

provider.setStablecoin(usdcAddress);

{
  "transactionType": "CALL",
  "to": "0xa729b836...",
  "function": "setStablecoin(address)",
  "arguments": ["0x1c7D4B19..."]
}

Proxy usage (internal)

// Used by proxies – executes code in caller's context
// You won't see this in transactions, it's internal
proxy.delegatecall(implementation, data);