tbech32: around 5% speedup for bech32_decode - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
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---
DIR commit b83f7159a9dd635a7a6f12d479e8704f6d7ae4b2
DIR parent d7597d96d0c336838adb32e3e175d3ea6f9763e8
HTML Author: SomberNight <somber.night@protonmail.com>
Date: Sun, 28 Feb 2021 16:53:21 +0100
bech32: around 5% speedup for bech32_decode
useful for lnaddr.lndecode
Diffstat:
M electrum/segwit_addr.py | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
---
DIR diff --git a/electrum/segwit_addr.py b/electrum/segwit_addr.py
t@@ -23,6 +23,7 @@
CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+_CHARSET_INVERSE = {x: CHARSET.find(x) for x in CHARSET}
def bech32_polymod(values):
t@@ -72,7 +73,7 @@ def bech32_decode(bech, ignore_long_length=False):
if not all(x in CHARSET for x in bech[pos+1:]):
return (None, None)
hrp = bech[:pos]
- data = [CHARSET.find(x) for x in bech[pos+1:]]
+ data = [_CHARSET_INVERSE[x] for x in bech[pos+1:]]
if not bech32_verify_checksum(hrp, data):
return (None, None)
return (hrp, data[:-6])