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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.

Difference between long-term-fee-rate and discard fee-rate

In the bitcoin-core codebase, it seems that discard fee-rate and long-term fee-rate are used interchangeably when computing the cost of change. Consider the following code excerpts: cost_of_change = discard_feerate.GetFee(change_spend_size) + effective_feerate.GetFee(change_output_size); ref: https://github.com/bitcoin/bitcoin/blob/2990bd773551c835ab0b6b59d85730adab2fd428/src/wallet/spend.cpp#L1182 and also: cost_of_change = effective_feerate.GetFee(change_output_size) + long_term_feerate.GetFee(change_spend_size); ref: https://github.com/bitcoin/bitcoin/blob/2990bd773551c835ab0b6b59d85730adab2fd428/src/wallet/test/fuzz/coinselection.cpp#L96 In both of these snippets, the cost_of_change is being computed, however, one uses the long-term fee-rate while the other uses the discard fee-rate. Are these two terms actually distinct or can they be used interchangeably? To my knowledge, cost_of_change should be calculated using the discard fee_rate, and the long_term fee_r...
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LBANK

LBANK

Why would forbidding `OP_IF` in Tapscript be a problem?

Following up from Is it a bug that OP_IF is part of the Tapscript opcodes? : BIP110 proposes to forbid OP_IF and OP_NOTIF in leaf scripts. However, old UTXOs are grandfathered in, so the new rules would only apply to UTXOs created after its activation. How could this still create issues for users? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/wWk7KIQ via IFTTT
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How to set up Bitcoin Core to mine a valid block after the BIP-110 activation in August 2026?

I want to set up the latest Bitcoin Core version to mine a block that is valid after the BIP-110 is activated (two months from now). What are the steps to do at minimum? I want to make sure that a block is not rejected by the Bitcoin P2P network. BIP-110 specification: https://github.com/bitcoin/bips/blob/master/bip-0110.mediawiki from Recent Questions - Bitcoin Stack Exchange https://ift.tt/khDYz8c via IFTTT
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How can I test whether my Bitcoin Core node is working correctly?

I want to make sure my Bitcoin Core node is working correctly. Are there any tools to test it — such as querying node status or sending test transactions? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/Nx5GiBa via IFTTT
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Being asked by Blockcahin Processor to pay funds to release my crypto [duplicate]

Being asked by Eleanor Bank of Blockchain Processor to pay $75,000 USD to release $250,000 AUS I did not think you had to pay an upfront fee and apparently this gets returned to you. They need this for verification purposes. This is after the finance department of the company I am dealing with authorised the transfer to my Australian CBA account 4 weeks ago. from Recent Questions - Bitcoin Stack Exchange https://ift.tt/Awd3xTB via IFTTT
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Why does BIP-110’s decentralization benefit not outweigh its impact on transaction neutrality?

I understood that BIP-110 aims to reduce node costs by limiting certain non-financial transaction patterns. If affordable full nodes are essential for decentralization, why is transaction neutrality considered the more important principle? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/jGo0yKb via IFTTT
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Urgent: Lost Access to Blockchain Wallet (No Seed Phrase) – Is there any way to recover using Wallet ID and Linked Email?"

"Hi everyone, I am in a desperate situation and need some genuine technical advice. I have lost access to my non-custodial Blockchain wallet. The Situation: I do not have my 12-word recovery phrase or private key. I do have my Wallet ID. I do have access to the email linked to that wallet. I have the exact Public BTC address where my funds are currently sitting. My Questions for the Community: Since Blockchain.com is non-custodial, is there any technical path (like decrypting a wallet file if I can find it on my old PC) that I should explore? If I still have the browser or device where I used to log in, are there any hidden files/cookies I should look for to bypass the password? Has anyone successfully recovered a wallet in this exact state (having ID + Email but no seed)? If yes, what was your approach? Please, no scammers DMing me offering 'recovery services'. I know that no one can recover it if they don't have the seed, but I am looking for technical l...
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