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BIP65: Add SPV client considerations

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Peter Todd 2015-10-23 17:16:22 -04:00
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@ -282,6 +282,16 @@ preceding a block do have nVersion >= 4, nVersion < 4 blocks become
invalid, and all further blocks enforce the new rules.
===SPV Clients===
While SPV clients are (currently) unable to validate blocks in general,
trusting miners to do validation for them, they are able to validate block
headers and thus can validate a subset of the deployment rules. SPV clients
should reject nVersion < 4 blocks if 950 out of 1000 preceding blocks have
nVersion >= 4 to prevent false confirmations from the remaining 5% of
non-upgraded miners when the 95% threshold has been reached.
==Credits==
Thanks goes to Gregory Maxwell for suggesting that the argument be compared