Tangem Wallet Pack of 2 - Secure Crypto Wallet - Trusted Cold Storage for Bitcoin, Ethereum, NFT's &

Tangem Wallet Pack of 2 - Secure Crypto Wallet - Trusted Cold Storage for Bitcoin, Ethereum, NFT's &
Key item features Ultimate Security: Generates a private key that remains on the card, safeguarding crypto and NFTs from hackers with EAL6+ certification and audited firmware. Versatile Compatibility: Manages over 13,000 tokens across 70+ blockchains, supporting DeFi, NFTs, and DeEx without wires, Bluetooth, or USB. Effortless Operation: Utilizes NFC for secure transactions via a mobile device and the Tangem app, enabling buying and selling crypto with various payment methods. Smart Backup: Features a second Tangem Wallet as a backup, eliminating the need for paper, pictures, or seed phrases for recovery. Durable Design: Boasts IP68 protection against environmental conditions, ensuring longevity and robust physical security. Comprehensive Support: Compatible with Bitcoin, Ethereum, Solana, XRP, USDT, and over 6,000 cryptocurrencies, integrating with dApps and WalletConnect.

LBANK

LBANK

Error message "mandatory-script-verify-flag-failed" when constructing a SigHash SINGLE | ANY transaction

One of the main possibilities that SigHash SINGLE | ANY (0x83) has, is to combine two or more transactions with this particular flag into one (Modularity).

That's the theory, but when it comes to practice, it is not working (at least for me); Let me explain:

I created this two transactions in testnet4, both spending only one input and sending it to only one output, both P2PKH:

Transaction 1:

0100000001bd20399c1f2d841f1e147ad2e03df1635f48fc5b8cdbb55ea3a86b14225e2743000000006a4730440220435c5161232d1b3215c44169f7c0328f1af1d40b4a8f2ec16795f442e9b80f7e022047fd3dd15421d2a0956a79e2141f3a72d2fe69c4e6c5bcc75047bd6d8bf019f5832102313b35fdf7af967980d29e684c508c90e11d99b10cab20ef477c9e63d9bf7bf7ffffffff0158980000000000001976a914c103e57c094061209b419e5ca559704a8a22f3f988ac00000000

Transaction 2:

0100000001d38e64afa39dd966f96e07bf56ae44bc3d402630771480f461389edff8a0051e010000006a4730440220645a7a25ebb00194a3b2f940d5618d021f513c2dd9bdc0504f623824e9845d8e0220077af01808e98b7ca97d2927243f9beb8cbd48e85d07dde26ea46c2e79d6c2ee832102e90fb489e28444cdfd85057fcce5f6d6ab1ba525acf570a7ffa355dbb7f21162ffffffff0128a00000000000001976a914d80f48340dd7ee6c7fae287342d3eeb1d4d887e288ac00000000

Then, I have combined them into one, making sure that outputs are in the correct index position:

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

When I verify the signatures with a code that I created (that also reconstructs the Hash-Preimage of each one; I have checked that the Hash-Preimage reconstructed for each input, is the same one as the Hash-Preimage of the transaction separately), the signatures are valid.

But when I try to broadcast it, the following error message appears: (code 26) Failed to broadcast transaction, reason: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)

What could be happening?



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