`hex_data` returned by hyperion has the wrong padding hence returning the wrong action receipt

[gitmp01]

Hello, we've checked out v3.3.7-2 and it seems the hex_data field in the action is mismatching the one in the explorer, here's an example:

this action can be found here under the path execution_trace.action_traces.inline_traces[2]:

"act": {
    "account": "xbsc.ptokens",
    "name": "pegin",
    "authorization": [
       {
            "actor": "xbsc.ptokens",
            "permission": "active"
        }
    ],
    "data": {
        "destinationAddr": "0xb713C9ce8655D0D98BBcD6AB9b77B4769d28d722",
        "quantity": "350.0000 EFX",
        "sender": "kucoinrise11",
        "tokenContract": "effecttokens",
        "userData": ""
    },
    "hex_data": "1082c2ee4e47918680a7823467a4d652e06735000000000004454658000000002a30786237313343396365383635354430443938424263443641423962373742343736396432386437323200000000"
}

while from our hyperion-api we get this one for the same action

{
  "account": "xbsc.ptokens",
  "name": "pegin",
  "authorization": [
    {
      "actor": "xbsc.ptokens",
      "permission": "active"
    }
  ],
  "data": {
    "sender": "kucoinrise11",
    "tokenContract": "effecttokens",
    "quantity": "350.0000 EFX",
    "destinationAddr": "0xb713C9ce8655D0D98BBcD6AB9b77B4769d28d722",
    "userData": ""
  },
  "hex_data": "1082C2EE4E47918680A7823467A4D652E06735000000000004454658000000002A30786237313343396365383635354430443938424263443641423962373742343736396432386437323200",
  "global_sequence": 357286554079
}

you can clearly see that the padding is wrong.

This patch has temporary solved the issue for us, but it's not robust for obvious reasons:

diff --git a/api/routes/v1-history/get_actions/get_actions.ts b/api/routes/v1-history/get_actions/get_actions.ts
index 39e32a9..81a92d9 100644
--- a/api/routes/v1-history/get_actions/get_actions.ts
+++ b/api/routes/v1-history/get_actions/get_actions.ts
@@ -336,6 +336,14 @@ async function getActions(fastify: FastifyInstance, request: FastifyRequest) {
                         txEnc,
                         txDec
                     );
+                   // We noticed that pegin action needs the hex_data
+                   // field padded to 158/2 bytes, hence this fix,
+                   // redeem actions are not affected by this problem
+                  let tmp = action.act.hex_data;
+                   if (action.act.name === "pegin") {
+                       action.act.hex_data = tmp.padEnd(158, '0')
+                   }
+
                 } catch (e: any) {
                     console.log(e);
                 }