[taler-exchange] branch master updated: handle idempotency on purse deletion

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grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new 1e7e0058 handle idempotency on purse deletion
1e7e0058 is described below

commit 1e7e0058e85e7399ff39e1fc9eaa4316afd5b91c
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Dec 28 12:41:49 2022 +0100

    handle idempotency on purse deletion
---
 src/exchangedb/exchange_do_delete_purse.sql | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/exchangedb/exchange_do_delete_purse.sql 
b/src/exchangedb/exchange_do_delete_purse.sql
index 3d493e62..1e6540ec 100644
--- a/src/exchangedb/exchange_do_delete_purse.sql
+++ b/src/exchangedb/exchange_do_delete_purse.sql
@@ -54,7 +54,13 @@ INSERT INTO purse_deletion
   ,purse_sig)
 VALUES
   (in_purse_pub
-  ,in_purse_sig);
+  ,in_purse_sig)
+ON CONFLICT DO NOTHING;
+
+IF NOT FOUND
+THEN
+  RETURN;
+END IF;
 
 -- store purse decision
 INSERT INTO purse_decision

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