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

What am I doing wrong in calculating Merkle root of the block with only 2 transactions (block #99997)?

I want to learn how to calculate the Merkle root so I started from a simple example, a block with only 2 transactions (block #99997). However, I ran into a problem.

Mempool online block explorer says that the Merkle root of this block is: 5140e5972f672bf8e81bc189894c55a410723b095716eaeec845490aed785f0e.

However, I am getting the different value.

Two transactions are contained inside the block #99997 and their TXID are:

  • b86f5ef1da8ddbdb29ec269b535810ee61289eeac7bf2b2523b494551f03897c

  • 80c6f121c3e9fe0a59177e49874d8c703cbadee0700a782e4002e87d862373c6

I did the following steps:

  1. concatenation of transaction IDs
    (result:b86f5ef1da8ddbdb29ec269b535810ee61289eeac7bf2b2523b494551f03897c80c6f121c3e9fe0a59177e49874d8c703cbadee0700a782e4002e87d862373c6)
  2. SHA256 of the result from the step 1 (result:e08d8ecc5a02b113bea1e7e2786b8235ddb5ab6058910f30b4d966b30e484bda)
  3. SHA256 of the result from the step 2 (result:5ab58ee21a1ae7476d59e6b7ddb05a80e8b42a4bf5748e9c5db9eb860b2bd040)

As you can see I got the different value for the Merkle root than the one presented on the Mempool site.

Mine: 5ab58ee21a1ae7476d59e6b7ddb05a80e8b42a4bf5748e9c5db9eb860b2bd040

Their: 5140e5972f672bf8e81bc189894c55a410723b095716eaeec845490aed785f0e

What am I doing wrong?



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