bip-bod-descriptors: add proprietary fields

Author: seedhammer

bip-bod-descriptors.mediawiki

@@ -93,6 +93,13 @@ space savings.
 The major source of bloat, base58 encoded keys, are binary encoded for compactness and
 can be re-used multiple times in a single descriptor.
 .</ref>
+|-
+| Proprietary Use Type
+| <tt>BOD_GLOBAL_PROPRIETARY = 0xFC</tt>
+| <tt><compact size uint identifier length> <bytes identifier> <compact size uint subtype> <bytes subkeydata></tt>
+| Compact size unsigned integer of the length of the identifier, followed by identifier prefix, followed by a compact size unsigned integer subtype, followed by the key data itself.
+| <tt><bytes data></tt>
+| Any value data as defined by the proprietary type user.
 |}
 
 It is an error to omit the BOD_GLOBAL_OUTPUT_DESCRIPTOR entry.
@@ -128,6 +135,13 @@ The defined key types are as follows:
 | The 78 byte serialized extended public key as defined by BIP 32.
 | <tt><4 byte fingerprint> <32-bit little endian uint path element>*</tt>
 | The master key fingerprint as defined by BIP 32 concatenated with the derivation path of the public key. The derivation path is represented as 32-bit little endian unsigned integer indexes concatenated with each other. The number of 32 bit unsigned integer indexes must match the depth provided in the extended public key.
+|-
+| Proprietary Use Type
+| <tt>BOD_KEY_PROPRIETARY = 0xFC</tt>
+| <tt><compact size uint identifier length> <bytes identifier> <compact size uint subtype> <bytes subkeydata></tt>
+| Compact size unsigned integer of the length of the identifier, followed by identifier prefix, followed by a compact size unsigned integer subtype, followed by the key data itself.
+| <tt><bytes data></tt>
+| Any value data as defined by the proprietary type user.
 |}
 
 ==Test Vectors==