net: Deserialize hardcoded seeds from BIP155 blob

Switch from IPv6 slot-based format to more compact and flexible BIP155
format.

Author: laanwj

src/chainparams.cpp

@@ -134,7 +134,7 @@ class CMainParams : public CChainParams {
 
         bech32_hrp = "bc";
 
-        vFixedSeeds = std::vector<SeedSpec6>(std::begin(pnSeed6_main), std::end(pnSeed6_main));
+        vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_main), std::end(chainparams_seed_main));
 
         fDefaultConsistencyChecks = false;
         fRequireStandard = true;
@@ -239,7 +239,7 @@ class CTestNetParams : public CChainParams {
 
         bech32_hrp = "tb";
 
-        vFixedSeeds = std::vector<SeedSpec6>(std::begin(pnSeed6_test), std::end(pnSeed6_test));
+        vFixedSeeds = std::vector<uint8_t>(std::begin(chainparams_seed_test), std::end(chainparams_seed_test));
 
         fDefaultConsistencyChecks = false;
         fRequireStandard = false;

src/chainparams.h

@@ -14,11 +14,6 @@
 #include <memory>
 #include <vector>
 
-struct SeedSpec6 {
-    uint8_t addr[16];
-    uint16_t port;
-};
-
 typedef std::map<int, uint256> MapCheckpoints;
 
 struct CCheckpointData {
@@ -108,7 +103,7 @@ class CChainParams
     const std::vector<std::string>& DNSSeeds() const { return vSeeds; }
     const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
     const std::string& Bech32HRP() const { return bech32_hrp; }
-    const std::vector<SeedSpec6>& FixedSeeds() const { return vFixedSeeds; }
+    const std::vector<uint8_t>& FixedSeeds() const { return vFixedSeeds; }
     const CCheckpointData& Checkpoints() const { return checkpointData; }
 
     //! Get allowed assumeutxo configuration.
@@ -130,7 +125,7 @@ class CChainParams
     std::string bech32_hrp;
     std::string strNetworkID;
     CBlock genesis;
-    std::vector<SeedSpec6> vFixedSeeds;
+    std::vector<uint8_t> vFixedSeeds;
     bool fDefaultConsistencyChecks;
     bool fRequireStandard;
     bool m_is_test_chain;