# Quai

By [Tushar](https://paragraph.com/@tushar-2) · 2023-03-19

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Quai's Iron Age implementation of the EVM introduces two new opcodes for developers to utilize: ISADDRINTERNAL - Checks if the provided address is within the smart contract's context ETX - Emits an external transaction from the smart contract

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*Originally published on [Tushar](https://paragraph.com/@tushar-2/quai)*