Function: getParent()
function getParent(contextCall): ClaimIssuer;
Function to get the parent of a call context. If the transaction that held the
currently executing CallOp was extracted from L1, it will be "Parser",
otherwise, the issuer will be the smart contract that created the transaction
that held this CallOp.
Parameters
• contextCall: CallContext
The call context.
Returns
The issuer of the call context.