chainparams: add allowed assumeutxo values

Values for mainnet and testnet will be specified in a follow-up PR that can be
scrutinized accordingly. This structure is required for use in snapshot activation
logic.

src/chainparams.cpp

@@ -8,7 +8,6 @@
 #include <chainparamsseeds.h>
 #include <consensus/merkle.h>
 #include <hash.h> // for signet block challenge hash
-#include <tinyformat.h>
 #include <util/system.h>
 #include <util/strencodings.h>
 #include <versionbitsinfo.h>
@@ -161,6 +160,10 @@ public:
             }
         };
 
+        m_assumeutxo_data = MapAssumeutxo{
+         // TODO to be specified in a future patch.
+        };
+
         chainTxData = ChainTxData{
             // Data from RPC: getchaintxstats 4096 0000000000000000000b9d2ec5a352ecba0592946514a92f14319dc2b367fc72
             /* nTime    */ 1603995752,
@@ -250,6 +253,10 @@ public:
             }
         };
 
+        m_assumeutxo_data = MapAssumeutxo{
+            // TODO to be specified in a future patch.
+        };
+
         chainTxData = ChainTxData{
             // Data from RPC: getchaintxstats 4096 000000000000006433d1efec504c53ca332b64963c425395515b01977bd7b3b0
             /* nTime    */ 1603359686,
@@ -431,6 +438,17 @@ public:
             }
         };
 
+        m_assumeutxo_data = MapAssumeutxo{
+            {
+                110,
+                {uint256S("0x76fd7334ac7c1baf57ddc0c626f073a655a35d98a4258cd1382c8cc2b8392e10"), 110},
+            },
+            {
+                210,
+                {uint256S("0x9c5ed99ef98544b34f8920b6d1802f72ac28ae6e2bd2bd4c316ff10c230df3f2"), 210},
+            },
+        };
+
         chainTxData = ChainTxData{
             0,
             0,
@@ -526,3 +544,9 @@ void SelectParams(const std::string& network)
     SelectBaseParams(network);
     globalChainParams = CreateChainParams(gArgs, network);
 }
+
+std::ostream& operator<<(std::ostream& o, const AssumeutxoData& aud)
+{
+    o << strprintf("AssumeutxoData(%s, %s)", aud.hash_serialized.ToString(), aud.nChainTx);
+    return o;
+}