BIP78: Doc amount parameter not required

It's an optional parameter in BIP 21 Bitcoin URIs, but it doesn't hurt to make it explicit. Co-authored-by: Martin Habovstiak <[email protected]>
bitcoin · May 31, 2024 · da32bf2 · da32bf2
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diff --git a/bip-0078.mediawiki b/bip-0078.mediawiki
@@ -131,6 +131,8 @@ This proposal is defining the following new [[bip-0021.mediawiki|BIP 21 URI]] pa
 * <code>pj=</code>: Represents an http(s) endpoint which the sender can POST the original PSBT.
 * <code>pjos=0</code>: Signal to the sender that they MUST disallow [[#output-substitution|payment output substitution]]. (See [[#unsecured-payjoin|Unsecured payjoin server]])
 
+Note: the <code>amount</code> parameter is *not* required.
+
 ===<span id="optional-params"></span>Optional parameters===
 
 When the payjoin sender posts the original PSBT to the receiver, he can optionally specify the following HTTP query string parameters: