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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.

E-MOBI / EKONOMIK MOBIL,S.R.L

E-MOBI / EKONOMIK MOBIL, S.R.L. - Your Partner in Artificial Intelligence At E-MOBI / EKONOMIK MOBIL, S.R.L., through our specialized branch E-MOBI Robotics Developments, we are pioneers in integrating Artificial Intelligence to power the future of your business. We don't just provide solutions; we create synergies that transform your potential. Our expertise is built around the following fundamental pillars, ensuring a holistic and results-oriented approach: Revolutionary Innovations: We are at the forefront of the latest advances in AI, developing innovative solutions that redefine industry standards. From fundamental research to practical application, our goal is to offer you a decisive competitive advantage. Profound Transformations: AI is a catalyst for change. We help companies achieve significant transformations by rethinking their processes, strategies, and business models to fully embrace the digital age. Limitless Scalability: Our solutions are desig...

LBANK

Any thoughts on making Bitcoin blockchain focus on a different utility to encourage common man adoption? [closed]

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Background I am exploring ways to encourage mainstream, everyday adoption of Bitcoin among non-technical users. While Bitcoin is heavily viewed as digital gold or a store of value, the average person often finds the technical barriers and lack of daily practical utility intimidating. I recently read about a Blockonomics Product Update detailing how native text and message searching has been integrated into their blockchain explorer, making embedded Bitcoin messages easily searchable. This got me thinking about whether data-carrying capabilities could be leveraged to drive human-centric utility. The Question What are the technical and economic implications of leaning into data/message utilities (like searchable on-chain communication) to drive consumer adoption, rather than focusing purely on financial transactions? Specifically, I am interested in: Scalability & Fees: How does encouraging users to embed and search text messages affect UTXO set bloat and overa...

What is the endianness of the hex strings returned by getblockhash and getblockheader?

What is the endianness of the values returned by bitcoin-cli RPC commands getblockhash and getblockheader (verbose = false) ? Bitcoin Wiki's " Block hashing algorithm " page says the header is comprised of " little-endian values in hex notation ". It continues (§ " Endianess "): Note that the hash, which is a 256-bit number, has lots of leading zero bytes when stored or printed as a big-endian hexadecimal constant, but it has trailing zero bytes when stored or printed in little-endian. Is this correct? So does getblockheader (verbose = false) return little-endian hex: $ bitcoin-cli getblockheader 00000000000000001e8d6829a8a21adc5d38d0a473b144b6765798e61f98bd1d false 0100000081cd02ab7e569e8bcd9317e2fe99f2de44d49ab2b8851ba4a308000000000000e320b6c2fffc8d750423db8b1eb942ae710e951ed797f7affc8892b0f1fc122bc7f5d74df2b9441a42a14695 and getblockhash : $ bitcoin-cli getblockhash 125552 00000000000000001e8d6829a8a21adc5d38d0a473b144b676...

Mempool front-running of a Taproot hashlock spend

I built a Taproot address with a SHA256-hashlock leaf ( OP_SHA256 <h> OP_EQUALVERIFY OP_TRUE , preimage "helloworld" ). On mainnet I spent that leaf — the witness necessarily contains the preimage and the leaf script. Within a few minutes, a different transaction spent the same UTXO to an unrelated address, paying a far higher fee, and confirmed instead of mine: my spend: 44bb85269ffacd88903154e8e2af0d4963ba4022cc57e706b5819fd008e978d3 (replaced) the replacement: 9fc1923c513cdf5a620ef88f61dbc3997e697cad0381b6f6c28827e4332dc363 ( link ) My understanding is that spending a hashlock reveals the preimage in the public mempool before confirmation , and under default full-RBF anyone can broadcast a higher-fee conflicting spend of the same output. Is this the correct explanation? Is automated "sweeping" of revealed-preimage / anyone-can-spend outputs a known, active phenomenon on mainnet, and is there any way to spend such an output without expos...

Are chains of 26 unconfirmed transactions prohibited by the wallet in Bitcoin Core 31.0?

I was testing Bitcoin Core 31.0 to see if I could make chains of unconfirmed transactions longer than 25. Release notes say: The mempool no longer enforces ancestor or descendant size/count limits. Instead, two new default policy limits are introduced governing connected components, or clusters, in the mempool, limiting clusters to 64 transactions and up to 101 kB in virtual size. Transactions are considered to be in the same cluster if they are connected to each other via any combination of parent/child relationships in the mempool. These limits can be overridden using command-line arguments; see the extended help (-help-debug) for more information. Does this only hold for transactions being relayed to my node, and not for transactions my wallet creates? Does the wallet still enforce the 25 txn limit during a transition period until the new mempool policy is more widespread? The following script on a newly started Bitocoin Core 31.0 regtest node fails on the last co...

Are these multi-megabyte Tapscripts BitVM2 disprove / fraud-proof scripts? (945 KB and 3.9 MB, no CHECKSIG)

4d7d18183be26673221121fe21a989215f8a76600e5db0a1311aad64a0afcdaa — block 898457, tapscript 945,706 B , 497 witness items.( link ) 8ecfefd438a229c7cea10f6973f49d8bbe3a620fd557f7f2cb3658ac59510249 — block 899747, tapscript 3,941,840 B , 859 witness items.( link ) ~9 days apart (2025-05); fee ≈ $785 and $11580; flagged Non-Standard. Opcode profile (push-aware): hundreds of thousands of OP_ADD / OP_PICK / OP_ROLL / OP_SUB , OP_TOALTSTACK / OP_FROMALTSTACK (alt-stack as memory), OP_IF / OP_ENDIF ~150k each, OP_HASH160 ladders; no signature opcode . Questions: (1) Are these BitVM2 mainnet disprove scripts? (2) What computation do they encode (and which step/gate)? (3) Is the deployment publicly documented (operator / repo)? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/CBJyhU7 via IFTTT

Lost access to my Blockchain wallet

I still have the email address and password to my Blockchain account but can't have access to my wallet due to my inability to provide the seed phrase linked to my wallet. from Recent Questions - Bitcoin Stack Exchange https://ift.tt/JBZG1Hy via IFTTT