onApproval method
Emitted when the allowance of a spender
for an owner
is set by a call to approve
.
value
is the new allowance.
Implementation
void onApproval(
void Function(
String owner, String spender, BigInt value, dynamic data)
callback) =>
contract.on(
'Approval',
(String owner, String spender, BigNumber value, dynamic data) =>
callback(owner, spender, value.toBigInt, convertToDart(data)));