Initial commit: snapshot of spesmilo/electrumx 2.0.0

Unmodified source tree of upstream commit 280cb339aa158e099eb936033eecd15719770651
("Merge pull request #389 from SomberNight/202607_release_2_0",
https://github.com/spesmilo/electrumx, release 2.0.0, 3 July 2026).

All Palladium-specific changes are in the commits that follow.

tests/blocks/pivx_testnet_10000.json

@@ -0,0 +1,15 @@
+{
+  "hash": "7f60e86164bd23295182f92b1120b67bb202599a7cbcc72aa677329a558fa8fc",
+  "size": 511,
+  "height": 10000,
+  "version": 8,
+  "merkleroot": "5bcd16ffb5e3640e22a17ef3eb4baf462aa826c6bd3a4ec9c55cfa67e4898d5f",
+  "tx": [
+    "32dbdea0cadcc47d3c4673d8f945696e91cf848e53416b3aa2b41aab77a6bffe", "9ab58bfc190e8c2bbc38da3effd79322405923b82dc1ca7aed1035c5a9f61b1b"
+  ],
+  "time": 1608824235,
+  "nonce": 0,
+  "bits": "1b0a372c",
+  "previousblockhash": "c2c6d9ceca0d3778f1a8c54f3221e6e30172c898e369170bb9a26270bf08f85a",
+  "block": "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"
+}