Get the Identity (i.e. Address or ContractId) from which a call was made.
Returns a Ok(Identity), or Err(AuthError) if an identity cannot be determined.

Additional Information

Returns an AuthError::InputsNotAllOwnedBySameAddress if the caller is external and the inputs to the transaction are not all owned by the same address.
Should not return an AuthError::CallerIsInternal under any circumstances.

Returns

• [Result<Identity, AuthError>] - Ok(Identity) if the identity can be determined, Err(AuthError) otherwise.

Examples

fn foo() {
    match msg_sender() {
        Ok(Identity::Address(address)) => log(address),
        Ok(Identity::ContractId(contract_id)) => log(contract_id),
        Err(AuthError::InputsNotAllOwnedBySameAddress) => log("Inputs not all owned by same address."),
        Err(AuthError::CallerIsInternal) => log("Hell froze over."),
    }
}