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Rachel Skro
@skrovina
Tell me something I don’t know about ETH
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shazow
@shazow.eth
Here's a weird technical detail to help dispell some magic: When you call a contract, the calldata in the transaction starts with 4 bytes (8 hex characters) which is the "selector". This tells the contract which function you're calling, it's actually a truncated hash of the original function signature. After that, it's arguments that get passed in. For example, claimWithdrawals(uint256[]) Is 0x48e30f54 There are databases of these you can use to look them up, like https://www.4byte.directory/
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