Where you can store data in Solidity
There are a few place you can store data in your Solidity apps, this guide will explain what they are
Table of Contents for Where you can store data in Solidity
Main 3 types of storing values/data in Solidity smart contracts
Memory
- temporarily stored in memory, only there while your functions are running
- not stored in blockchain
- mutatable
Calldata
- similar to memory but is immutable
- calldata is used for the args when you call a function on a smart contract
- See a more in-depth article about calldata here.
Storage
- storage data is stored on blockchain
- Mutable
- costs quite a bit in gas to store new data. Costs a bit less to update existing data. Can get a gas refund for deleting (setting slot to zero value)
Other ways of storing data
- Logs
- Stack
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