From eab66b6c3ec6f965c02f59b1420b38605b0678e6 Mon Sep 17 00:00:00 2001
From: Davide Grilli <davide.grilli@outlook.com>
Date: Mon, 1 Dec 2025 16:17:29 +0100
Subject: [PATCH] Rename BitcoinTestnet to PalladiumTestnet and update params

Update testnet constants to reflect Palladium-specific values including WIF prefix, address types, and segwit HRP. Also updates checkpoints for Palladium testnet chain.
---
 electrum/chains/testnet/checkpoints.json | 40 +++++-------------------
 electrum/constants.py                    | 28 +++++++++--------
 2 files changed, 23 insertions(+), 45 deletions(-)

diff --git a/electrum/chains/testnet/checkpoints.json b/electrum/chains/testnet/checkpoints.json
index 18f666da8..fad53e955 100644
--- a/electrum/chains/testnet/checkpoints.json
+++ b/electrum/chains/testnet/checkpoints.json
@@ -1,42 +1,18 @@
 [
     [
-        "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
-        26959535291011309493156476344723991336010898738574164086137773096960
+        "0000000000265b05d2f1e549900fc6b4ed31314bd6958fae831f7089264ce672",
+        18133479806237104990991743559445002972828967478631036821889351680
     ],
     [
-        "000000000002540a8bc872dccdcbf05e026c62c95ac86605713114fdf42756a1",
-        3139982046889008545132049271592324555994049059273355056316940288
+        "0000000000049cdfc630f8f6c1c7cb7e0338b6de06787c72115f0b3364dc17cb",
+        10204188400181031369987499837944269887010727159985068248888508416
     ],
     [
-        "000000000029160ca9abd86896d439151f516e3e3aaa6263698f1fd30a06ed69",
-        20177184866346035900762163715642378212249988466595081642632544256
+        "000000000000e9a2cdeab1d53e48c1556f1b907ce6607995f4d8bb313fa0ab42",
+        2420996537016082743761534115268695237027269164309000079175319552
     ],
     [
-        "000000000001a1a490bb9122381c46eb42fede0d194ec5fe10ceb8886c022421",
-        767576554406554097163368002248679864693828228459951068305948672
-    ],
-    [
-        "000000000029b52e7b4b9cc9f485e57471ab6d4e41404fe6f3de7ac4d2083db6",
-        18639056411310354419753369546958418048981099493194503553661534208
-    ],
-    [
-        "000000000003c39c4da2bb28d46a93d347db8b4162efa7d1684145a865464924",
-        2998037945346709533019430565365329595326726495607689843876823040
-    ],
-    [
-        "000000000001c7a6d092b155ce2de3d6de93bb8d4360c1ba69d208178f6bd0d4",
-        2414248652650542061940410641638746995629959132206201242073956352
-    ],
-    [
-        "0000000000004e352da34e50fc227e7db8de24beb9db208bab3f1fac52b2981e",
-        2182027273949911807082305611927179376566252492538254285269368832
-    ],
-    [
-        "0000000000005f66e1968f7348fd77db09105b3ea7d60065c9d4db24d06c804c",
-        2331918186289210357041940427563955242916360638196610965402812416
-    ],
-    [
-        "0000000000029b10a2f57e849d2dda2fd271a56fdb18b3409f089f52592f52fe",
-        2283741430470117582179500743740836403172775060160349500516335616
+        "000000000001353c9842ec56cd8197e6c25cc032f41391e31e1f6229b7e17159",
+        2200946458580367262904506681248727283144384991847868885291237376
     ]
 ]
diff --git a/electrum/constants.py b/electrum/constants.py
index 6d36f3fe1..59cfd956a 100644
--- a/electrum/constants.py
+++ b/electrum/constants.py
@@ -217,20 +217,20 @@ class Palladium(AbstractNet):
     SKIP_POW_DIFFICULTY_VALIDATION = True  # Palladium uses LWMA, not Bitcoin's difficulty algo
 
 
-class BitcoinTestnet(AbstractNet):
+class PalladiumTestnet(AbstractNet):
 
     NET_NAME = "testnet"
     TESTNET = True
-    WIF_PREFIX = 0xef
-    ADDRTYPE_P2PKH = 111
-    ADDRTYPE_P2SH = 196
-    SEGWIT_HRP = "tb"
+    WIF_PREFIX = 0xff  # 255 from base58Prefixes[SECRET_KEY]
+    ADDRTYPE_P2PKH = 127  # base58Prefixes[PUBKEY_ADDRESS]
+    ADDRTYPE_P2SH = 115  # base58Prefixes[SCRIPT_ADDRESS]
+    SEGWIT_HRP = "tplm"
     BOLT11_HRP = SEGWIT_HRP
     GENESIS = "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"
-    DEFAULT_PORTS = {'t': '51001', 's': '51002'}
+    DEFAULT_PORTS = {'t': '50001', 's': '50002'}
 
     XPRV_HEADERS = {
-        'standard':    0x04358394,  # tprv
+        'standard':    0x04358394,  # tprv - from base58Prefixes[EXT_SECRET_KEY]
         'p2wpkh-p2sh': 0x044a4e28,  # uprv
         'p2wsh-p2sh':  0x024285b5,  # Uprv
         'p2wpkh':      0x045f18bc,  # vprv
@@ -238,7 +238,7 @@ class BitcoinTestnet(AbstractNet):
     }
     XPRV_HEADERS_INV = inv_dict(XPRV_HEADERS)
     XPUB_HEADERS = {
-        'standard':    0x043587cf,  # tpub
+        'standard':    0x043587cf,  # tpub - from base58Prefixes[EXT_PUBLIC_KEY]
         'p2wpkh-p2sh': 0x044a5262,  # upub
         'p2wsh-p2sh':  0x024289ef,  # Upub
         'p2wpkh':      0x045f1cf6,  # vpub
@@ -247,13 +247,15 @@ class BitcoinTestnet(AbstractNet):
     XPUB_HEADERS_INV = inv_dict(XPUB_HEADERS)
     BIP44_COIN_TYPE = 1
     LN_REALM_BYTE = 1
-    LN_DNS_SEEDS = [  # TODO investigate this again
-        #'test.nodes.lightning.directory.',  # times out.
-        #'lseed.bitcoinstats.com.',  # ignores REALM byte and returns mainnet peers...
-    ]
+    LN_DNS_SEEDS = []  # No DNS seeds for Palladium testnet
+    SKIP_POW_DIFFICULTY_VALIDATION = True  # Palladium uses LWMA, not Bitcoin's difficulty algo
 
 
-class BitcoinRegtest(BitcoinTestnet):
+# Alias for backwards compatibility
+BitcoinTestnet = PalladiumTestnet
+
+
+class BitcoinRegtest(PalladiumTestnet):
 
     NET_NAME = "regtest"
     SEGWIT_HRP = "bcrt"