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I'm trying to bind a H160 address with a H256 address, if we assume this function:
fn bind(origin: OriginFor<T>, address: H160 , signature: [u8; 130]) -> Result<(), Error<T>>{
// check the signature belonging to an address
ensure!(check_signature(address, signature), Error<T>);
// bind the sender with the address
create_account(sender, address);
Ok(())
}
Is this function available in Substrate? Or do you have any advice on how to do the bind function?
H160 has a few flavors that you might pursue in the context of a Substrate chain:
If you are looking to map H160 Ethereum addresses to, say, SR25519 that is most common in Substrate chains, it is good to see the implementation in Frontier as a reference. Here a truncated hash scheme is used (H256 -> H160 by taking the first 160 (LE) bytes in the address). There are some tools to inspect truncated vs. Ethereum converted (ECDSA <-> SR25519) addresses in the frontier node template.
Another important example is to use H160 addresses as the base for accounting in you chain, this is exemplified in Moonbeam's Unified Accounts
because this PR was merged, Frontier now also supports Moonbeam's Unified Accounts (aka AccountId20)
