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bug: withdraw rpc creating redundant 25k output when used with utxos param #7945

@ca-ruz

Description

@ca-ruz

Here is my listfunds output before running the withdraw command:

$ l1-cli listfunds
{
   "outputs": [
      {
         "txid": "6a7f440ee87d019e0af9b433e34d20042c876d4c5d6fdd2286c6fd5ed3482ba9",
         "output": 0,
         "amount_msat": 1,000,000,000,000,
         "scriptpubkey": "001487e61d75df2ac63ac93acf613bb434fc9d8856b8",
         "address": "bcrt1qslnp6awl9trr4jf6easnhdp5ljwcs44cj8u386",
         "status": "confirmed",
         "blockheight": 314,
         "reserved": true,
         "reserved_to_block": 2330
      },
      {
         "txid": "0b2aa013c8c90133f897a3a560ac2d67d79733b3dd03016f617c295483162111",
         "output": 1,
         "amount_msat": 499999834000,
         "scriptpubkey": "51205412d3a3c9c2d8bbbc241fd9da60529166225ed60ca6b20db2284b8f90f30b03",
         "address": "bcrt1p2sfd8g7fctvth0pyrlva5czjj9nzyhkkpjntyrdj9p9cly8npvps3hcs0c",
         "status": "unconfirmed",
         "reserved": false
      }
   ],
   "channels": [
      {
         "peer_id": "03b10090b33ea76c958ef7dba028c3969cdafad84279f628f5cedce568c8d4afd3",
         "connected": true,
         "state": "DUALOPEND_AWAITING_LOCKIN",
         "channel_id": "c3195ab76b03046a1a79d9b9e18c9b1b6b34e1e54ee6fb0febe013d53509435e",
         "our_amount_msat": 500000000000,
         "amount_msat": 500100000000,
         "funding_txid": "0b2aa013c8c90133f897a3a560ac2d67d79733b3dd03016f617c295483162111",
         "funding_output": 2
      }
   ]
}

Now, I bumped the channel open using withdraw all and I specified the change output using the utxos param:

$ l1-cli withdraw -k destination=bcrt1qslnp6awl9trr4jf6easnhdp5ljwcs44cj8u386 satoshi=all feerate=5 utxos='["0b2aa013c8c90133f897a3a560ac2d67d79733b3dd03016f617c295483162111:1"]'  
{
   "tx": "02000000011121168354297c616f0103ddb33397d7672dac60a5a397f83301c9c813a02a0b0100000000fdffffff021802cd1d0000000016001487e61d75df2ac63ac93acf613bb434fc9d8856b8a861000000000000225120e754a8fa97173ac58ec45570151065cb9a467613b1421490a2a67b2ff665dc4f3a010000",
   "txid": "b0d371a5c796dee0c7145fd0e78312e206b18cb4470bc17a6b4ac577365fc397",
   "psbt": "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"
}

And this is my listfunds after:

$ l1-cli listfunds
{
   "outputs": [
      {
         "txid": "6a7f440ee87d019e0af9b433e34d20042c876d4c5d6fdd2286c6fd5ed3482ba9",
         "output": 0,
         "amount_msat": 1000000000000,
         "scriptpubkey": "001487e61d75df2ac63ac93acf613bb434fc9d8856b8",
         "address": "bcrt1qslnp6awl9trr4jf6easnhdp5ljwcs44cj8u386",
         "status": "confirmed",
         "blockheight": 314,
         "reserved": true,
         "reserved_to_block": 2330
      },
      {
         "txid": "0b2aa013c8c90133f897a3a560ac2d67d79733b3dd03016f617c295483162111",
         "output": 1,
         "amount_msat": 499999834000,
         "scriptpubkey": "51205412d3a3c9c2d8bbbc241fd9da60529166225ed60ca6b20db2284b8f90f30b03",
         "address": "bcrt1p2sfd8g7fctvth0pyrlva5czjj9nzyhkkpjntyrdj9p9cly8npvps3hcs0c",
         "status": "unconfirmed",
         "reserved": true,
         "reserved_to_block": 458
      },
      {
         "txid": "b0d371a5c796dee0c7145fd0e78312e206b18cb4470bc17a6b4ac577365fc397",
         "output": 0,
         "amount_msat": 499974680000,
         "scriptpubkey": "001487e61d75df2ac63ac93acf613bb434fc9d8856b8",
         "address": "bcrt1qslnp6awl9trr4jf6easnhdp5ljwcs44cj8u386",
         "status": "unconfirmed",
         "reserved": false
      },
      {
         "txid": "b0d371a5c796dee0c7145fd0e78312e206b18cb4470bc17a6b4ac577365fc397",
         "output": 1,
         "amount_msat": 25000000,
         "scriptpubkey": "5120e754a8fa97173ac58ec45570151065cb9a467613b1421490a2a67b2ff665dc4f",
         "address": "bcrt1pua22375hzuavtrky24cp2yr9ewdyvasnk9ppfy9z5eajlan9m38sk4tdts",
         "status": "unconfirmed",
         "reserved": false
      }
   ],
   "channels": [
      {
         "peer_id": "03b10090b33ea76c958ef7dba028c3969cdafad84279f628f5cedce568c8d4afd3",
         "connected": true,
         "state": "DUALOPEND_AWAITING_LOCKIN",
         "channel_id": "c3195ab76b03046a1a79d9b9e18c9b1b6b34e1e54ee6fb0febe013d53509435e",
         "our_amount_msat": 500000000000,
         "amount_msat": 500100000000,
         "funding_txid": "0b2aa013c8c90133f897a3a560ac2d67d79733b3dd03016f617c295483162111",
         "funding_output": 2
      }
   ]
}

Notice that a 25k sat output was created but this was not necessary because of the 1 billion sat output that already existed.

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