ECOS Mining Game

👾 What is the name of the mining difficulty metric used by pools? Share difficulty is the parameter in mining that defines the difficulty of the solution a miner submits to a pool. 🫶 A share is not a full block, but only a partial solution. A single share does not generate a reward on its own, but the more shares a miner submits, the greater their contribution to the pool’s work and, therefore, the larger their reward when the pool finds a full block. Share difficulty is set individually by each pool: some pools adjust the difficulty automatically based on the miner’s hardware power, while others use a fixed share difficulty. ☝️ Important: share difficulty does not affect how many blocks a pool finds or the miner’s overall income. Combo Code: 999666 Question of the Day: Share difficulty ❤️ ECOSMiningGamebot

🟠 What network is used for Bitcoin development experiments? A local network that simulates the Bitcoin network without using real coins, allowing developers to test Bitcoin applications and services without risking real money, is called Regtest. Unlike Mainnet and Testnet, Regtest runs entirely on your own computer and does not require a connection to other nodes. 🎯 Regtest is ideal for local development: it allows developers to simulate mining, instantly generate blocks, and test transactions, scripts, and new features without delays or the use of real or test bitcoins. That is why Regtest is widely used for developing Bitcoin applications, wallets, and conducting various experiments within the Bitcoin environment. Combo Code: 120995 Question of the Day: Regtest ❤️ ECOSMiningGamebot

🟠 What is the name of the Bitcoin test network? Testnet is a separate Bitcoin test network that runs parallel to the main network (Mainnet). Testnet uses a currency that has no real value, allowing developers and users to safely test transactions, new features, and software without the risk of losing real bitcoins. Testnet is widely used for wallet development and educational purposes, helping people safely learn how Bitcoin works. Combo Code: 000781 Question of the Day: Testnet ❤️ ECOSMiningGamebot

🎯What mining strategy involves withholding solved blocks? This refers to block withholding — a pool-level mining attack relevant to Bitcoin’s incentive structure, where a miner deliberately withholds valid full blocks from a mining pool instead of submitting them. 🕵️‍♂️ The attacker continues submitting shares to prove participation and appear honest, but discards any valid block they find. This directly reduces the pool’s realized block rewards, increasing variance and lowering expected payouts for honest participants. 🟠 In Bitcoin, block withholding exploits the payout mechanics of pooled mining, not the consensus rules. It does not affect block validity, chain selection, or network security, but instead targets economic trust assumptions inside mining pools. ☝️ Unlike selfish mining, block withholding does not involve private chains, block races, or the longest-chain (most-work) rule. It is fundamentally an incentive and governance attack, not a consensus-level one. Combo Code: 330033 Question of the Day: Block withholding ❤️ ECOSMiningGamebot

👾 What is the name of the unique identifier for every transaction? TXID (Transaction ID) is the unique identifier of a Bitcoin transaction, computed from the transaction’s data. In Bitcoin, the TXID is calculated as a double SHA-256 hash of the serialized transaction. It serves as a cryptographic fingerprint that uniquely represents the transaction on the Bitcoin blockchain. TXIDs are used to locate, verify, and track Bitcoin transactions in the mempool and on-chain via block explorers. Combo Code: 258147 Question of the Day: TXID ❤️ ECOSMiningGamebot

🤑 What is the size limit of a Bitcoin block header? The size of a Bitcoin block header is strictly fixed at 80 bytes. This header contains key data: ▪️Version (4 bytes) — indicates the block validation rules and possible protocol upgrades. ▪️Previous block hash (32 bytes) — the “link” in the blockchain. ▪️Merkle root (32 bytes) — a hash representing all transactions in the block through a tree structure. ▪️Timestamp (4 bytes) — indicates the block creation time in Unix time format. ▪️Bits (4 bytes) — a compact representation of the block’s difficulty target. ▪️Nonce (4 bytes) — a value iterated by miners to find a valid block hash. These fields enable the mining process — miners repeatedly change the nonce to find a hash that meets the current network difficulty. Despite its small size, the block header plays a critical role in the security and integrity of the blockchain. Combo Code: 420420 Question of the Day: 80 bytes ❤️ ECOSMiningGamebot

🟠 What field in a Bitcoin transaction sets when it becomes valid? ☝️ This field is called nLockTime. It specifies the earliest time or block height at which a transaction becomes valid for inclusion in a block. 👾 nLockTime can be set either as a block height or a Unix timestamp. Until this condition is met, the transaction may be broadcast to the network, but miners will not include it in a block. ⚙️ This mechanism enables delayed payments and time-based conditions for spending funds, which are widely used in Bitcoin Script and protocols such as the Lightning Network. Combo Code: 147258 Question of the Day: nLockTime ❤️ ECOSMiningGamebot

🟠 What is the incentive miners get from users, not the protocol? Transaction fees are the incentive miners receive directly from network users, rather than from newly issued bitcoin. When a user broadcasts a transaction, they attach a fee to economically incentivize miners to include it in a block. 🫶 Unlike the block subsidy, transaction fees are not newly created by the protocol — they are paid by users and redistributed to miners through block construction. ☝️ As halvings progressively reduce the block subsidy, transaction fees are expected to play an increasingly dominant role. Over time, they are likely to become the primary economic incentive securing the Bitcoin network. Combo Code: 003125 Question of the Day: Transaction fees ❤️ ECOSMiningGamebot

🫶 What is the term for miners switching pools based on profitability? Miners may switch between mining pools depending on their current profitability: when the expected reward decreases, they may leave a pool, and when it increases, they join it. This strategy is known as pool hopping. 🟠 Such behavior negatively affects pool stability and the fair distribution of rewards among participants. As a result, many modern pools use special payout models that reduce the benefits of pool hopping and encourage long-term participation. Combo Code: 710710 Question of the Day: Pool hopping ❤️ ECOSMiningGamebot

👾 What Reddit legend depicts a secret Bitcoin sanctuary? Street riots, a pandemic, and uncertain economic prospects — this is what the world has looked like for several years now… and BTC holders also feel uneasy in this environment. This atmosphere inspired the appearance of a dystopian Reddit post in which the author describes a secret refuge, or “citadel,” for Bitcoin enthusiasts. 👏 The Citadel first appeared on Reddit in 2013. The author claimed to have traveled back in time from the year 2025 and warned that Bitcoin had become a serious problem that led to a global collapse. A real war over BTC supposedly began, with holders stealing from one another. The narrator urged readers to stop Bitcoin in 2013 instead of allowing it to develop further. 🤑 The creativity of this post is undeniable! However, it had the opposite effect — the idea of a Bitcoin Citadel continues to attract and inspire holders even today. Combo Code: 211002 Question of the Day: BTC Citadel ❤️ ECOSMiningGamebot

👏 What phrase describes the idea that “Bitcoin cannot be stopped”? The phrase that describes the idea that “Bitcoin cannot be stopped” is Unstoppable Money. It reflects the essence of cryptocurrency as a decentralized and independent means of exchange and store of value. 🟠 Bitcoin operates without a central authority, making it impossible to fully block or control by governments or financial institutions. The concept of Unstoppable Money emphasizes user freedom, autonomy, and the resilience of Bitcoin as a global digital currency. Combo Code: 170509 Question of the Day: Unstoppable money ❤️ ECOSMiningGamebot

🤑 Which index fund-like product holds BTC under ticker GBTC? The index fund-like product that holds Bitcoin under the ticker GBTC is the Grayscale Bitcoin Trust. It is an investment vehicle that allows both institutional and retail investors to gain exposure to Bitcoin without directly owning the cryptocurrency. ❄️ Grayscale Bitcoin Trust converts investor funds into shares, each backed by real BTC. This provides a convenient way to participate in the cryptocurrency market through traditional brokerage accounts and retirement funds. Combo Code: 663242 Question of the Day: Grayscale Bitcoin Trust ❤️ ECOSMiningGamebot

🫶 What is the process of mining without broadcasting blocks to attack the network? In the context of Bitcoin, this behavior is known as Selfish Mining. It is a strategy in which a miner or mining pool deliberately withholds newly mined blocks instead of immediately broadcasting them to the network, continuing to mine on a private chain. ⚡️ The goal of selfish mining is not to break Bitcoin’s consensus rules or directly attack the network, but to gain an economic advantage by exploiting block propagation delays and the longest-chain rule. By selectively releasing hidden blocks at strategic moments—often to create or resolve temporary forks—the selfish miner increases the likelihood that honest miners’ blocks become orphaned, effectively wasting their computational work. If executed successfully, this strategy can allow the selfish miner to receive a disproportionately higher share of block rewards relative to their actual hash power. However, academic research shows that such behavior only becomes economically viable beyond a significant hash rate threshold, typically estimated around 25–33%, depending on network conditions. 🟠 In practice, Bitcoin significantly mitigates the impact of selfish mining through fast block propagation, improved networking protocols, and strong economic incentives that discourage sustained block withholding. To date, there is no confirmed evidence of successful selfish mining attacks on Bitcoin’s mainnet. Instead, the concept primarily serves as an illustration of how incentive misalignment—rather than protocol failure—can pose theoretical risks even in decentralized systems. Combo Code: 282344 Question of the Day: Selfish mining ❤️ ECOSMiningGamebot

👾 What kind of curve does Bitcoin use in cryptography? Bitcoin uses the secp256k1 elliptic curve for its public-key cryptography. 🟠 Historically, Bitcoin relied exclusively on ECDSA over secp256k1 to generate public keys and sign transactions. This mechanism allows users to prove ownership of funds without ever revealing their private keys. Since the activation of Taproot (BIP-340), Bitcoin additionally supports Schnorr signatures over the same secp256k1 curve. Schnorr signatures are used only for Taproot (P2TR) outputs and coexist with ECDSA rather than replacing it. 📈 The elliptic curve itself has not changed. The introduction of Schnorr improves efficiency, privacy, and enables advanced constructions such as signature aggregation and more flexible smart-contract designs, while maintaining full backward compatibility with existing ECDSA-based transactions. Combo Code: 111482 Question of the Day: secp256k1 elliptic curve ❤️ ECOSMiningGamebot

🤑 What is the supply of Bitcoin in circulation after 2024 halving? After the 2024 halving, there will be approximately 19.5 million BTC in circulation. 👏 Halving reduces the block reward for miners, slowing the issuance of new coins and maintaining Bitcoin’s scarcity. 🫶 This event is important for all market participants, as the reduced issuance rate can impact Bitcoin’s price, increasing demand for the existing supply. Halvings are a key mechanism that make Bitcoin a predictable and scarce digital asset. Combo Code: 346500 Question of the Day: ~19.5M BTC ❤️ ECOSMiningGamebot

🟠 What is the symbolic block height of the Genesis Block? The symbolic block height of the Genesis Block is 0. This is the very first block in the Bitcoin blockchain, marking the beginning of the network’s entire history. 1️⃣ The Genesis Block was created by Satoshi Nakamoto on January 3, 2009, and contains a special message in its header: a reference to the headline of the day’s newspaper, symbolizing the birth of a new financial system. This block lays the foundation for the entire blockchain and is a key historical milestone. Combo Code: 597657 Question of the Day: 0 ❤️ ECOSMiningGamebot

👾 Which opcode was disabled by Satoshi due to security risks? OP_VERIF is sometimes mentioned in theoretical discussions as a version-based verification opcode. However, it was disabled by Satoshi in the early days of Bitcoin due to security concerns. 🟠 While Bitcoin Script always halts and does not allow infinite loops, OP_VERIF could be abused to increase script validation complexity, introduce denial-of-service vectors through expensive evaluation, and complicate future consensus upgrades. To reduce the attack surface, it was removed as part of Bitcoin’s deliberately minimal scripting design. ☝️ In practice, signature verification in Bitcoin is handled explicitly through OP_CHECKSIG, preserving deterministic execution and network safety. Combo Code: 223192 Question of the Day: OP_VERIF ❤️ ECOSMiningGame

👾 What’s the function of Bitcoin mempool? The mempool in the Bitcoin network is essentially a “waiting area” for unconfirmed transactions. When a user sends BTC, the transaction first enters the mempool, where it waits to be included in the next block by miners. 🫶 The mempool helps the network process transactions efficiently: miners select transactions from the queue, usually prioritizing those with higher fees. This means the mempool directly affects confirmation speed and how much you pay in transaction fees. 🟠 You can think of the mempool as a lobby for transactions — the busier it is, the longer you might have to wait, especially if fees are low. It’s one of the key mechanisms that keeps the blockchain predictable and manageable. Combo Code: 658232 Question of the Day: Store unconfirmed transactions ❤️ ECOSMiningGamebot

👾 What’s the standard block confirmation time considered final in exchanges? The standard block confirmation time considered final on exchanges is about 6 confirmations, which usually takes around 1 hour. ☝️ Each block in the blockchain confirms previous transactions. The more confirmations a transaction has, the harder it becomes to change or reverse it. For exchanges, six confirmations are considered enough to safely credit funds to a user’s account. 📈 Multiple confirmations protect users and platforms from double-spending and ensure the reliability of cryptocurrency operations. Even if the network experiences temporary speed fluctuations, 6 confirmations provide a high level of security. Combo Code: 362389 Question of the Day: 6 confirmations (~1 hour) ❤️ ECOSMiningGamebot

🫶 What is the estimated year when the last Bitcoin will be mined? The last Bitcoin is estimated to be mined around the year 2140. This is due to the halving mechanism, which halves miners’ rewards every 210,000 blocks, gradually slowing down Bitcoin issuance. Thanks to this limited supply, Bitcoin becomes a disinflationary asset. This mechanism encourages long-term holding and makes the currency resistant to inflation, unlike traditional fiat money. Combo Code: 759122 Question of the Day: 2140 ❤️ ECOSMiningGamebot