The provided Address and Address_Type are the identity of
a device. So either its public address or static random address.
+
+
+New Signature Resolving Key Event
+=================================
+
+Event Code 0x0019
+Controller Index <controller id>
+Event Parameters Store_Hint (1 Octet)
+ Key {
+ Address (6 Octets)
+ Address_Type (1 Octet)
+ Master (1 Octet)
+ Value (16 Octets)
+ }
+
+ This event indicates that a new signature resolving key has been
+ generated for either the master or slave device.
+
+ The Store_Hint parameter indicates whether the host is expected
+ to store the key persistently or not.
+
+ When the Master parameter is set to 0x01, then the signature
+ resolving key from the remote peer device is provided. It is
+ the key that is used for signature verification.
+
+ When the Master parameter is set to 0x00, then it is the local
+ signature resolving key that is used to sign data. The remote
+ peer device will be using it for signature verification.
+
+ The local signature resolving key will be generated with each
+ pairing request. Only after receiving this event with Master
+ parameter set to 0x00 it is possible to use ATT Signed Write
+ procedures.
+
+ Possible values for the Address_Type parameter:
+ 0 Reserved (not in use)
+ 1 LE Public
+ 2 LE Random
+
+ The provided Address and Address_Type are the identity of
+ a device. So either its public address or static random address.