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I. Core Guess Logic

HD Token Blackhole Blind Box Hash Guess is a decentralized and fair guessing game built on the Binance Smart Chain (BSC). It realizes "transfer participation + on-chain judgment" through blockchain technology throughout the process, with no manual intervention and publicly verifiable results. Participants only need to transfer HD tokens to the official designated blackhole address to lock their guessing qualification. The final winning result is uniquely determined by the on-chain block hash data, ensuring the fair rights and interests of every participant.

1.1 Core Participation Information

- Participating Token: HD (Contract Address: 0x799ec3e38304b2a4c8da7e3c8341fb8888888888), BEP-20 Standard

- Blackhole Address (Exclusive Participation Entry): 0x000000000000000000000000000000000000dead (hereinafter referred to as "Official Burn Address")

- Underlying Chain: Binance Smart Chain (BSC)

- Core Principles: Decentralized Judgment, Tamper-Proof Results, Full Transparency of Rules

II. Participation Steps (Simple 4-Step Process)

1. Transfer to Participate: Transfer any amount of HD tokens from your personal BSC wallet to the "Official Burn Address" (ensure sufficient Gas fees are reserved to avoid transaction failure);

2. Record Block Number: After the transaction is confirmed on-chain, note down the "Block Height" corresponding to the transaction (denoted as N);

3. Lock Judgment Basis: The system automatically uses the hash value of the "next block" (Block Height N+1) as the core for winning judgment;

4. Result Determination: After Block N+1 is generated and confirmed, extract the last character of its hash value. Compare the "odd/even nature of the units digit of the transferred amount" with the "odd/even nature of the hash suffix" — a match means winning, while a mismatch results in the participating tokens being sent to the blackhole for permanent burn.

Practical Example

Suppose you transfer 158 HD tokens (units digit is 8, even). This transaction is recorded at Block Height 168 (i.e., N=168). The system will extract the hash value of Block Height 169 (N+1). If the last character is "E" (even), you win; if it is "3" (odd), you do not win.

III. Odd/Even Judgment Standards (Clear Reference)

3.1 Odd/Even of Transferred Amount

Based on the units digit of the transferred HD token amount:

- Odd: 1, 3, 5, 7, 9

- Even: 0, 2, 4, 6, 8

3.2 Odd/Even of Block Hash Suffix

Block hash values are 64-character hexadecimal strings (0-9, A-F). Extract the last character and judge according to the following rules:

- Odd: Digits 1, 3, 5, 7, 9 or Letters B, D, F

- Even: Digits 0, 2, 4, 6, 8 or Letters A, C, E

Note: Block hashes are jointly generated by global nodes, fully complying with cryptographic rules, and possess unpredictability and uniqueness.

IV. Reward & Penalty Mechanism (Transparent & Verifiable)

4.1 Winning Rewards

- Reward Ratio: Winners receive 1.96x the transferred token amount in HD tokens as a refund;

- Distribution Method: Automatically executed by the smart contract, arriving in the wallet within 1 second after Block N+1 is confirmed. Distribution records can be real-time queried via block explorers;

- Additional Benefit: Gas fees incurred for reward distribution are borne by the official, no additional payment required from participants.

4.2 Non-Winning Explanation

- Token Handling: Non-winning HD tokens are directly transferred to the blackhole address for permanent burn, completely exiting circulation;

- Verifiable Burn: All burn records are permanently on-chain and can be real-time verified through block explorers such as BscScan;

- Burn Value: The deflationary mechanism reduces the total circulating supply, further enhancing the scarcity and value support of remaining HD tokens.

V. Fairness & Technical Guarantees (Participate with Confidence)

5.1 Complete Anti-Prediction Design

To eliminate any possibility of prediction, the game specifically uses the "next block hash" as the judgment basis:

- Block hashes are jointly verified and generated by global computing power, constrained by the Proof of Work mechanism, and cannot be manipulated by any individual or entity;

- The time window from Block N confirmation to Block N+1 generation is only about 0.45 seconds. During this period, no subject can obtain or modify the hash value in advance;

- "Avalanche Effect" of Hash Values: Even minor changes in input lead to drastically different results, ensuring absolute randomness of judgment.

5.2 Full Transparency & Traceability

- Entire Process On-Chain: Transfer records, block hashes, reward distributions, and token burns — all data is publicly queryable via Binance Chain block explorers, and everyone can verify independently;

- Open-Source Contract Audit: Core logic (judgment rules, reward calculation, burn execution) is fully written into the smart contract and undergoes open-source auditing, with no room for manual intervention;

- Tamper-Proof Hashes: Once a block is generated, its hash value is permanently recorded on the blockchain. Any modification would require recalculating the hashes of all subsequent blocks, which is technically impossible in terms of computing power.

VI. Risk Reminders & Participation Notes (Must Read Carefully)

1. Address Verification: Ensure the transfer address is the official designated burn address (0x000000000000000000000000000000000000dead). Transferring to the wrong address will result in tokens being unable to participate in the game and irretrievable;

2. Transaction Confirmation: After transferring, wait for at least 1 on-chain confirmation block. Unconfirmed transactions cannot be included in the guessing system;

3. Token Restriction: Only HD tokens are accepted for participation. Transferring other tokens will result in direct burn in the blackhole with no refund;

4. Prudent Operation: Blockchain transactions are irreversible. Confirm the transfer amount carefully before participating and make rational decisions;

5. Compliance Reminder: This guess is an entertaining on-chain activity automatically executed by smart contracts, not involving legal tender transactions. Participants must comply with the laws and regulations of their respective regions and participate within their financial capacity.

VII. Result Query Tutorial (Verify Independently)

1. Query Block Height N: Open BscScan, enter your transfer transaction hash, and obtain the corresponding Block Height N in the "Block Number" field;

2. Query Target Block Hash: Enter Block Height N+1 on BscScan and find the corresponding "Block Hash";

3. Independent Judgment: Compare the units digit of your transfer amount with the hash suffix according to the odd/even standards in Part III of these rules to know the result;

4. Check Reward Arrival: Query the smart contract transfer records via your personal wallet or BscScan to confirm if the reward has arrived.

Supplementary Provisions

These rules take effect immediately upon release. If rule adjustments are required due to blockchain technology iterations or force majeure, a prior announcement will be made through official channels. By transferring HD tokens to the official burn address, you are deemed to have fully read, understood, and agreed to all provisions of these rules, and voluntarily accept the automatic execution results of the smart contract.
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