bitcoin core – Error making RPC request: mandatory-script-verify-flag-failed (Invalid Schnorr signature)

I’ve 3 Taproot addresses: one with 50 BTC, and 1 recepient, and one for change

sender bcrt1p7d90fjh4k2uu7jjzw6hev8nnak2cultvcyjaj5zum696eqpwfausw79xuk
wif cULydXkHkv3h1jH7yVaGcNCvWHzbVsDiAxW76Mc8QrSqzNPU2sUG
recipient bcrt1p725t652m53g7j87n2ypm3x9pdl9f88c4c2hjyvymq78qhrc6tpsq5wp62r
change bcrt1pj5fle7sshyr04yershteu745zs2peguum7z575rydshtscmdjysq4eus02

I attempt to ship 1 BTC and make uncooked transaction for key path spend sort

That is unspent of sender:

[
    {
        "txid": "6ee6185784989263847ebd3d2aadb83bdbe80ed0011821085975226ae994e259",
        "vout": 0,
        "address": "bcrt1p7d90fjh4k2uu7jjzw6hev8nnak2cultvcyjaj5zum696eqpwfausw79xuk",
        "label": "",
        "scriptPubKey": "5120f34af4caf5b2b9cf4a4276af961e73ed958e7d6cc125d9505cde8bac802e4f79",
        "amount": 50,
        "confirmations": 101,
        "spendable": true,
        "solvable": true,
        "desc": "rawtr(f34af4caf5b2b9cf4a4276af961e73ed958e7d6cc125d9505cde8bac802e4f79)#qrffuhzp",
        "parent_descs": [
            "addr(bcrt1p7d90fjh4k2uu7jjzw6hev8nnak2cultvcyjaj5zum696eqpwfausw79xuk)#cx2kp4mn"
        ],
        "secure": true
    }
]

Make transaction object

     [CREATE TRANSACTION START]
    -- Quantity to ship (sats): 100000000
    -- Charge (sats): 1000000
    -- Get UTXO id for pay: 6ee6185784989263847ebd3d2aadb83bdbe80ed0011821085975226ae994e259
    -- Reversed UTXO id: 59e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e
    -- Full generated tx: {
        "model":2,
        "inputs":
            [{
                "txid":"59e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e",
                "vout":0,
                "scriptSig":"",
                "sequence":4294967295
            }],
        "outputs":[{
                "value":100000000,
                "scriptPubKey":"51209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300"
            },{
                "value":4899000000,
                "scriptPubKey":"5120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c8900"
            }],
        "locktime":0}
    [CREATE TRANSACTION END]

Signal and serialize

[SIGN AND SERIALIZE TRANSACTION START]
[INPUT 0]
-- txid (32 bytes): 59e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e
-- Vout (4 bytes LE32): 00000000
-- ScriptSigLength (1 bytes Compact measurement): 00
-- ScriptSig (0 bytes):
-- Sequence (4 bytes LE32): ffffffff
-- [SIGHASH FOR 0 INPUT START]
---- Model (4 bytes LE32): 02000000
---- LockTime (4 bytes LE32): 00000000
---- InputIdx (4 bytes LE32): 00000000
---- SighashTypeBuf (1 bytes): 00
---- [HASH PREVOUTS (txid + LE32(vout)) START]
------ Prevout for 0 enter (36 bytes): 59e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e00000000
---- [HASH PREVOUTS END]
---- Lastly hashPrevouts (32 bytes): 35bb28a690e32f668589a79a1b4f7ba82c00c08fe39b29672e861e90526991a9
---- [HASH AMOUNTS (LE64(amount))) START]
------ Quantity for 0 enter (8 bytes LE64): 3200000000000000
---- [HASH AMOUNTS END]
---- Lastly hashAmounts (32 bytes): 0cbbab9d99fb661a1686f17ccaaf8a9d069aa8cb755925045a1d049c060b9e67
---- [HASH SCRIPT PUB KEYS (OP_1 + PUSH_32 + pubKeyHash) START]
------ ScriptPubKey for 0 enter (34 bytes): 51209a57a657ad95ce7a5213b57cb0f39f6cac73eb66092eca82e6f45d6401727bc8
---- [HASH SCRIPT PUB KEYS END]
---- Lastly hashScriptPubKeys (32 bytes): 96d403e277844293f22ba2b1914d646d8353adbe2c49a22a7f421a8c97221eaa
---- [HASH SEQUENCES (LE32(sequence)) START]
------ Sequence for 0 enter (4 bytes LE32): ffffffff
---- [HASH SEQUENCES END]
---- Lastly hashSequences (32 bytes): ad95131bc0b799c0b1af477fb14fcf26a6a9f76079e48bf090acb7e8367bfd0e
---- [HASH OUTPUTS (LE64(amount), CompactSize(size), scriptPubKey) START]
------ Quantity of 0 out (8 bytes LE64): 00e1f50500000000
------ ScriptPubKey of 0 out (34 bytes): 51209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300
------ Dimension of 0 out (1 bytes CompactSize): 22
------ Output of 0 out (43 bytes): 00e1f505000000002251209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300
------ Quantity of 1 out (8 bytes LE64): c0ce002401000000
------ ScriptPubKey of 1 out (34 bytes): 5120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c8900
------ Dimension of 1 out (1 bytes CompactSize): 22
------ Output of 1 out (43 bytes): c0ce002401000000225120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c8900
---- [HASH OUTPUTS END]
---- Lastly hashOutputs (32 bytes): c74c74b357372c390436f57e6046707b88dc74a7199e9194922818188192de44
---- Preimage (174 bytes): 02000000000000000035bb28a690e32f668589a79a1b4f7ba82c00c08fe39b29672e861e90526991a90cbbab9d99fb661a1686f17ccaaf8a9d069aa8cb755925045a1d049c060b9e6796d403e277844293f22ba2b1914d646d8353adbe2c49a22a7f421a8c97221eaaad95131bc0b799c0b1af477fb14fcf26a6a9f76079e48bf090acb7e8367bfd0ec74c74b357372c390436f57e6046707b88dc74a7199e9194922818188192de440000000000
---- TaggedHash (32 bytes): 7f73f0e9137223806b5c6c4f157f30ed439949decb84b4ab1eff249fa61692c1
-- [SIGHASH FOR 0 INPUT END]
-- Sighash (32 bytes): 7f73f0e9137223806b5c6c4f157f30ed439949decb84b4ab1eff249fa61692c1
-- SignatureObject (64 bytes): 4227542a9daebfbf518e12b016f09f5f7feaae42bdf5874039dfd1ff7ec66b63b625e27be13a04b3d58c81891aca8908cd5ca548cfc3f080fd2d0bcfc0045138
-- Pubkey (32 bytes): f34af4caf5b2b9cf4a4276af961e73ed958e7d6cc125d9505cde8bac802e4f79
-- VALID? true
-- Witness rely for 0 enter (1 bytes Compact Dimension): 01
-- Signature len for 0 enter (1 bytes Compact Dimension): 40
-- Signature for 0 enter (64 bytes): 4227542a9daebfbf518e12b016f09f5f7feaae42bdf5874039dfd1ff7ec66b63b625e27be13a04b3d58c81891aca8908cd5ca548cfc3f080fd2d0bcfc0045138
[OUTPUT 0]
-- Worth (8 bytes LE64): 00e1f50500000000
-- ScriptPubKey (34 bytes): 51209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300
-- ScriptPubKeySize (1 bytes Compact measurement): 22
[OUTPUT 1]
-- Worth (8 bytes LE64): c0ce002401000000
-- ScriptPubKey (34 bytes): 5120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c8900
-- ScriptPubKeySize (1 bytes Compact measurement): 22
Locktime (4 bytes LE32): 00000000
Marker (1 bytes): 00
Flag (1 bytes): 01
Model (4 bytes LE32): 02000000
InputsLen (1 bytes Compact Dimension): 01
OutputsLen (1 bytes Compact Dimension): 02
Lastly rawTx (205 bytes): 0200000000010159e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e0000000000ffffffff0200e1f505000000002251209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300c0ce002401000000225120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c89000140eddd2049ece47dd2fea1fb2e5f9d0c475e32431a472c64d543160097359f266f13c3a409de8366d09b105741ecaee1cfac6542ed1e084cee58310d82da28775000000000
[SIGN AND SERIALIZE TRANSACTION END]

And in spite of everything i received

Error making RPC request: mandatory-script-verify-flag-failed (Invalid Schnorr signature)

However construction of transaction is legitimate, signature too, witness too….

{
  "model": "02000000",
  "marker": "00",
  "flag": "01",
  "inputcount": "01",
  "inputs": [
    {
      "txid": "59e294e96a22755908211801d00ee8db3bb8ad2a3dbd7e84639298845718e66e",
      "vout": "00000000",
      "scriptsigsize": "00",
      "scriptsig": "",
      "sequence": "ffffffff"
    }
  ],
  "outputcount": "02",
  "outputs": [
    {
      "amount": "00e1f50500000000",
      "scriptpubkeysize": "22",
      "scriptpubkey": "51209545ea8add228f48fe9a881dc4c50b7e549cf8ae15791184d83c705c78d2c300"
    },
    {
      "amount": "c0ce002401000000",
      "scriptpubkeysize": "22",
      "scriptpubkey": "5120a89fe7d085c837d4991c2ebcf3d5a0a0a0e51ce6fc2a7a83236175c31b6c8900"
    }
  ],
  "witness": [
    {
      "stackitems": "01",
      "0": {
        "size": "40",
        "item": "4227542a9daebfbf518e12b016f09f5f7feaae42bdf5874039dfd1ff7ec66b63b625e27be13a04b3d58c81891aca8908cd5ca548cfc3f080fd2d0bcfc0045138"
      }
    }
  ],
  "locktime": "00000000"
}

Please assist. Could also be one thing flawed in bytes or information or order ? Thanks very a lot!

Metaplanet Fuels Bitcoin Guess With $50M Zero-Value Debt Transfer

April 25, 2026

Will Bitcoin Fill The $82K CME Hole? $10B Might Be Liquidated—However Bulls Might Hate What Follows

April 24, 2026