From 66834b8db2102e142f7acd103cc9667a02949562 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Mon, 18 Jan 2021 17:03:22 +0100
Subject: document wire field

---
 core/api-exchange.rst | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/core/api-exchange.rst b/core/api-exchange.rst
index 670789f4..2f4ac95c 100644
--- a/core/api-exchange.rst
+++ b/core/api-exchange.rst
@@ -1155,10 +1155,13 @@ denomination.
       // coin's total value.
       contribution: Amount;
 
-      // The merchant's account details. This must be a JSON object whose format
-      // must correspond to one of the supported wire transfer formats of the exchange.
-      // See `wireformats`.
-      wire: object;
+      // The merchant's account details.
+      // The salt is used to hide the payto_uri from customers
+      // that learn the h_wire of the merchant.
+      wire: {
+        payto_uri: string;
+        salt: HashCode;
+      };
 
       // SHA-512 hash of the merchant's payment details from ``wire``.  Although
       // strictly speaking redundant, this helps detect inconsistencies.
-- 
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