Fix base58 and bech32 prefixes for signet addresses and keys

These prefixes  had values based on some early signet branch of Bitcoin Core,
and they were changed afterwards, now they are the same as for testnet

bitcointx/wallet.py

@@ -681,7 +681,7 @@ class CBech32BitcoinTestnetAddress(CBech32CoinAddress,
 
 class CBech32BitcoinSignetAddress(CBech32CoinAddress,
                                   CBitcoinSignetAddress):
-    bech32_hrp = 'sb'
+    bech32_hrp = 'tb'
 
 
 class CBech32BitcoinRegtestAddress(CBech32CoinAddress,
@@ -714,7 +714,7 @@ class P2PKHBitcoinRegtestAddress(P2PKHCoinAddress,
 
 class P2PKHBitcoinSignetAddress(P2PKHCoinAddress,
                                 CBase58BitcoinSignetAddress):
-    base58_prefix = bytes([125])
+    base58_prefix = bytes([111])
 
 
 class P2SHBitcoinRegtestAddress(P2SHCoinAddress,
@@ -724,7 +724,7 @@ class P2SHBitcoinRegtestAddress(P2SHCoinAddress,
 
 class P2SHBitcoinSignetAddress(P2SHCoinAddress,
                                CBase58BitcoinSignetAddress):
-    base58_prefix = bytes([87])
+    base58_prefix = bytes([196])
 
 
 class P2WSHBitcoinAddress(P2WSHCoinAddress, CBech32BitcoinAddress):
@@ -869,7 +869,7 @@ class CBitcoinRegtestKey(CCoinKey, WalletBitcoinRegtestClass):
 
 
 class CBitcoinSignetKey(CCoinKey, WalletBitcoinSignetClass):
-    base58_prefix = bytes([217])
+    base58_prefix = bytes([239])
 
 
 class CCoinExtPubKey(CBase58DataDispatched, CExtPubKeyBase,

release-notes.md

@@ -21,6 +21,9 @@ Added Taproot support:
 
 Removed bitcointx.core.serialize.VarBytesSerializer - it was a duplicate of BytesSerializer
 
+Fixed base58 and bech32 prefixes for signet addresses and keys (they had values based on some early
+signet branch of Bitcoin Core, and they were changed afterwards, now they are the same as for testnet)
+
 ...
 
 ## v1.1.2