first pass: moar data

Author: doc-hex

bip-0329.mediawiki

@@ -136,6 +136,45 @@ The following fragment represents a wallet label export:
 { "type": "tx", "ref": "f546156d9044844e02b181026a1a407abfca62e7ea1159f87bbeaa77b4286c74", "label": "Account #1 Transaction", "origin": "wpkh([d34db33f/84'/0'/1'])" }
 </pre>
 
+==Additional Fields==
+
+If the goal is solely to move labels between cooperating wallets,
+then above values are the minimum needed. However, wallet data
+exports can serve other purposes and many values associated with
+addresses, transactions and outputs are already on-hand for the
+wallet generating the export, and yet would be hard or impossible
+for importing tools to reconstruct.
+
+All of the following values are optional for exporter to provide,
+but should be given if they are readily on-hand.
+
+=== Transactions ===
+
+* `height`: an integer giving the block height where this fully-confirmed transaction can be found.
+  Omit for transactions that are confirmed by less than 6 blocks, or use value zero.
+
+* `time`: ISO-8601 formated timestamp of the block given by height, preferably in UTC.
+   Example: `2025-01-23T11:40:35-05:00`.
+
+* `fee`: integer giving the number of Satoshis that went to the miner for this transaction.
+
+=== Address, Inputs, and Outputs ===
+
+* `keypath`: the data needed to build full descriptor down to the specific address.
+  This extends `origin` with the final two components are are unhardened (in the typical case,
+  assuming BIP-84).  Provide string `/1/123` for `wpkh([d34db33f/84'/0'/0'/1/123])`. If
+  the first character is not `/`, then it should be interpreted as a full descriptior,
+  independant of `origin` (if any).
+
+=== Inputs, and Outputs ===
+
+* `value`: integer with the number of Satoshis (`nValue`) of the input or output.
+
+=== Address ===
+
+* `heights`: a list of block heights which contain inputs which deposit to the address.
+
+
 ==Reference Implementation==
 
 TBD