This message notifies a peer about extended protocol parameters. This message MAY be sent during connection initialization. If sent, it MUST be sent immediately subsequent to the receipt of the verack message, and before other non-initialization messages are sent.
|number of values||variable||variable length integer||The number of values being sent.|
||The list of values to communicate.|
|field||variable||variable length integer||Indicates the field type of the value to follow. See XVersion Fields.|
|size of value||variable||variable length integer||The size of the value to follow.|
||bytes||The value for the preceding field type (
XVersion field identifiers are 32 bits and split into a 16 bit prefix and 16 bit suffix. Each development group is assigned a prefix so that new identifiers do not accidentally conflict. Once a field identifier is created by group A, it should be used by other software both to receive that information from A and to present that information to other software. Therefore, group A MUST NOT change the syntax or semantics of a field once defined. To change a field, create a new identifier and deprecate (by no longer using the original identifier).
|Reserved for versioning||0|
|Bitcoin Cash Node||1|
See xversionkeys.dat for the most up-to-date field definitions defined by the BitcoinUnlimited full node.
Supported by: Bitcoin Unlimited