Merge #8083: Add support for dnsseeds with option to filter by servicebits

2d83013d Add support for dnsseeds with option to filter by servicebits (Jonas Schnelli)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 5c7d19012..000511567 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -16,6 +16,14 @@
 
 #include "chainparamsseeds.h"
 
+std::string CDNSSeedData::getHost(uint64_t requiredServiceBits) const {
+    //use default host for non-filter-capable seeds or if we use the default service bits (NODE_NETWORK)
+    if (!supportsServiceBitsFiltering || requiredServiceBits == NODE_NETWORK)
+        return host;
+    
+    return strprintf("x%x.%s", requiredServiceBits, host);
+}
+
 static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
 {
     CMutableTransaction txNew;
@@ -197,6 +205,8 @@ public:
 
         vFixedSeeds.clear();
         vSeeds.clear();
+        // nodes with support for servicebits filtering should be at the top
+        vSeeds.push_back(CDNSSeedData("testnetbitcoin.jonasschnelli.ch", "testnet-seed.bitcoin.jonasschnelli.ch", true));
         vSeeds.push_back(CDNSSeedData("bitcoin.petertodd.org", "testnet-seed.bitcoin.petertodd.org"));
         vSeeds.push_back(CDNSSeedData("bluematt.me", "testnet-seed.bluematt.me"));
         vSeeds.push_back(CDNSSeedData("bitcoin.schildbach.de", "testnet-seed.bitcoin.schildbach.de"));