Function asDerivative

Send a call through an indexed pseudonym of the sender. In other words, send a call through a derivative account of the signer. The signer will need to have an already existing index derived account in order to succesfully execute this call.

Each account has 2**16 possible "pseudonyms" (alternative account IDs) and these can be stacked. This can be useful as a key management tool, where you need multiple distinct accounts (e.g. as controllers for many staking accounts), but where it's perfectly fine to have each of them controlled by the same underlying keypair.

Derivative accounts are, for the purposes of proxy filtering considered exactly the same as the oigin and are thus hampered with the origin's filters.

NOTE: If you need to ensure that any account-based filtering is ignored (i.e. because you expect proxy to have been used prior in the call stack and you do not want the call restrictions to apply to any sub-accounts), then use as_multi_threshold_1 in the Multisig pallet instead.

NOTE: Prior to version *12, this was called as_limited_sub.

The dispatch origin for this call must be Signed.