What the developer wrote
Authored by scgbckbone
bump ccc_min_block (block height)
What changed, and why it matters
This commit updates a single configuration number in the COLDCARD firmware that tells the device the earliest Bitcoin block height at which a certain feature (likely related to 'ccc' or CoinJoin-style coordination) should be considered active. It is a routine date/height bump, not a code change that fixes a vulnerability. By itself it does not appear to introduce or patch a security flaw.
No security action required based on this commit alone. Review the feature that consumes `ccc_min_block` to confirm the new height is correct and that the height-gate logic itself is sound.
Security signals we found
No security-relevant code change in the diff
Single constant update for a block-height gate
No mention of security, vulnerability, CVE, or bug in commit message
Evidence from the diff
The change modifies ccc_min_block in shared/chains.py for BitcoinMain from block 892714 (April 16, 2025) to block 916210 (September 24, 2025). This is a constant update for a time- or height-gated feature. There is no logic change, no bounds checking, no input validation, and no cryptographic change in the diff. Without additional context, this cannot be classified as a security patch.
Changed components
shared/chains.pyBitcoinMain chain parametersInspect captured patch +1 / −1
diff --git a/shared/chains.py b/shared/chains.py
index 16fa756..ad29e16 100644
--- a/shared/chains.py
+++ b/shared/chains.py
@@ -313,7 +313,7 @@ class BitcoinMain(ChainsBase):
# see <https://github.com/bitcoin/bitcoin/blob/master/src/chainparams.cpp#L140>
ctype = 'BTC'
name = 'Bitcoin Mainnet'
- ccc_min_block = 892714 # Apr 16/2025
+ ccc_min_block = 916210 # Sep 24/2025
slip132 = {
AF_CLASSIC: Slip132Version(0x0488B21E, 0x0488ADE4, 'x'),
Why this scored 12/100
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