[gh-771] support simple on-chain random number. #1052
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feliciss
requested review from
jolestar,
wow-sven,
geometryolife and
baichuan3
as code owners
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| public fun bytes_to_u64(bytes: vector<u8>): u64 { |
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From seed to the final random number, is an additional algorithm required to generate it?
| vector::append(&mut seed_bytes, tx_hash_bytes); | ||
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| vector::append(&mut seed_bytes, timestamp_ms_bytes); |
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If the user does not initiate a new transaction, considering that the global timestamp is synchronized from the BTC Block, the interval period is about 10 minutes. During this period, are the seed and random numbers obtained the same every time?
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I referred to the description of #771 and have been doing so according to that. If the timestamp and tx hash or tx accumulator root are the same during the interval period, it would be the same random number (if the user does not initiate tx to increase the sequence number). Without additional algorithm, there is no randomness guaranteed.
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Generating a random number needs a new transaction. That transaction will include the sequencer time and update the timestamp.
Summary
Add simple random number generator move module.