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cleanup

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Skot Croshere 2022-11-17 18:16:28 -05:00
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bm1397_protocol.md
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@ -31,22 +31,22 @@ TX: 55 AA 21 96 04 04 00 00 00 00 72 E7 07 17 A9 81 51 63 EE D6 E5 43 35 3F 14 9
How does this big work field break down?
`55 AA` ->
`21` -> always 21. like bitcoin, always 21 million coins?
`96` -> length
`04` -> jobID
`04` -> midstates
`00 00 00 00` -> always zero. Is this the starting nonce?
`72 E7 07 17` -> nbits
`A9 81 51 63` -> ntime. if you flip the endianess, this is unixtimestamp for Thu Oct 20 2022 17:13:13 GMT. boom!
`EE D6 E5 43` -> last 4 bytes of the merkle root
`35 3F 14 92 56 25 54 19 4E 41 31 08 E5 D7 89 4A C8 13 50 A4 48 05 B8 0E E2 E4 83 95 F8 C1 15 8D` -> midstate computed from the first 64 bytes of the header
`EC 07 D8 B8 AE CA DE E6 35 8C 3E E9 1C 57 5D 99 A7 52 95 DC D8 08 7B 7A D` -> ?? another midstate?
- `55 AA` ->
- `21` -> always 21. like bitcoin, always 21 million coins?
- `96` -> length
- `04` -> jobID
- `04` -> midstates
- `00 00 00 00` -> always zero. Is this the starting nonce?
- `72 E7 07 17` -> nbits
- `A9 81 51 63` -> ntime. if you flip the endianess, this is unixtimestamp for Thu Oct 20 2022 17:13:13 GMT. boom!
- `EE D6 E5 43` -> last 4 bytes of the merkle root
- `35 3F 14 92 56 25 54 19 4E 41 31 08 E5 D7 89 4A C8 13 50 A4 48 05 B8 0E E2 E4 83 95 F8 C1 15 8D` -> midstate computed from the first 64 bytes of the header
- `EC 07 D8 B8 AE CA DE E6 35 8C 3E E9 1C 57 5D 99 A7 52 95 DC D8 08 7B 7A D` -> ?? another midstate?
when the BM1397 finds a nonce that makes a hash below the difficulty (which difficulty is that?) it responds with;
```
AA 55 00 03 EA 0F 02 20 9C
```
this means the Nonce 0003ea0f was found for JobID 20
this means the Nonce `0003ea0f` was found for JobID `20`
If the BM1397 _doesn't_ find a good nonce in the whole nonce space, it just goes off into lalaland. It's up to the miner to keepm track of what the ASIC is doing and send it more work if this happens. If you look at the hashing frequency you should be able to time this.