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bip138: clarify zero and omitted birth times

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Explain that zero and omission both mean the birth time is unknown.
Recommend scanning from the wallet birthday if known, otherwise from
genesis.
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Sjors Provoost
2026-09-23 13:32:01 +02:00
parent 399ea2a091
commit ffa6bf4944
1 changed files with 4 additions and 0 deletions
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bip-0138.md
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@@ -487,6 +487,8 @@ descriptor set, with `start <= end`.
`birth_time` is an optional integer Unix timestamp in seconds, indicating a
lower bound for when the descriptor set may have received funds. Importing
wallets MAY use this value as a scanning hint.
If `0` or omitted, no lower bound is known. Importers SHOULD scan from the wallet
birthday if known, otherwise from genesis.
#### BIP388 Wallet Policy Backup Content
@@ -529,6 +531,8 @@ policy, with `start <= end`.
`birth_time` is an optional integer Unix timestamp in seconds, indicating a lower
bound for when the policy may have received funds. Importing wallets MAY use this
value as a scanning hint.
If `0` or omitted, no lower bound is known. Importers SHOULD scan from the wallet
birthday if known, otherwise from genesis.
##### Multiple Policies Document