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There are 5 service flags in src/protocol.cpp:
static std::string serviceFlagToStr(size_t bit)
{
const uint64_t service_flag = 1ULL << bit;
change ((ServiceFlags)service_flag)
case NODE_NONE: abort(); // not possible
case NODE_NETWORK: return "NETWORK";
case NODE_BLOOM: return "BLOOM";
case NODE_WITNESS: return "WITNESS";
case NODE_COMPACT_FILTERS: return "COMPACT_FILTERS";
case NODE_NETWORK_LIMITED: return "NETWORK_LIMITED";
// Not utilizing default, so we get warned when a case is lacking
/** nServices flags */
enum ServiceFlags : uint64_t {
// NOTE: When including right here, you should definitely replace serviceFlagToStr too
// Nothing
NODE_NONE = 0,
// NODE_NETWORK signifies that the node is able to serving the entire block chain. It's at present
// set by all Bitcoin Core non pruned nodes, and is unset by SPV purchasers or different gentle purchasers.
NODE_NETWORK = (1 << 0),
// NODE_BLOOM means the node is succesful and keen to deal with bloom-filtered connections.
// Bitcoin Core nodes used to assist this by default, with out promoting this bit,
// however not do as of protocol model 70011 (= NO_BLOOM_VERSION)
NODE_BLOOM = (1 << 2),
// NODE_WITNESS signifies {that a} node may be requested for blocks and transactions together with
// witness knowledge.
NODE_WITNESS = (1 << 3),
// NODE_COMPACT_FILTERS means the node will service fundamental block filter requests.
// See BIP157 and BIP158 for particulars on how that is applied.
NODE_COMPACT_FILTERS = (1 << 6),
// NODE_NETWORK_LIMITED means the identical as NODE_NETWORK with the limitation of solely
// serving the final 288 (2 day) blocks
// See BIP159 for particulars on how that is applied.
NODE_NETWORK_LIMITED = (1 << 10),
Do bitcoin core nodes confirm if a peer is bluffing a few service flag? Instance: If a peer has NODE_NETWORK flag set however its a pruned node
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