Add a BIP to define 24 bits of nVersion as nonce space not 16#2116
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TheBlueMatt wants to merge 1 commit intobitcoin:masterfrom
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Add a BIP to define 24 bits of nVersion as nonce space not 16#2116TheBlueMatt wants to merge 1 commit intobitcoin:masterfrom
TheBlueMatt wants to merge 1 commit intobitcoin:masterfrom
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murchandamus
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Mar 5, 2026
| <pre> | ||
| BIP: ? | ||
| Title: 24 nVersion bits for general purpose use | ||
| Author: Matt Corallo <bips@bluematt.me> |
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Suggested change
| Author: Matt Corallo <bips@bluematt.me> | |
| Authors: Matt Corallo <bips@bluematt.me> |
| Author: Matt Corallo <bips@bluematt.me> | ||
| Status: Draft | ||
| Type: Specification | ||
| Created: 2026-02-26 |
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Suggested change
| Created: 2026-02-26 | |
| Assigned: ? |
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| ==Rationale== | ||
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| Headers-only mining avoids mining devices (either ASICs or the firmware) from having to concern itself with the vast space of consensus logic (handling transactions, merkle trees, etc). It is widely deployed in ASICs, but requires a substantial number of jobs fed across an entire device, keeping the ASIC controller busy. Providing additional nonce space for the ASICs to roll without needing fresh work from the controller may simplify ASIC design somewhat, and as been apparently adopted in some miners by using extra space in nTime as extra nonce space. Doing so in nVersion instead is preferable to using nTime. |
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Suggested change
| Headers-only mining avoids mining devices (either ASICs or the firmware) from having to concern itself with the vast space of consensus logic (handling transactions, merkle trees, etc). It is widely deployed in ASICs, but requires a substantial number of jobs fed across an entire device, keeping the ASIC controller busy. Providing additional nonce space for the ASICs to roll without needing fresh work from the controller may simplify ASIC design somewhat, and as been apparently adopted in some miners by using extra space in nTime as extra nonce space. Doing so in nVersion instead is preferable to using nTime. | |
| Headers-only mining avoids mining devices (either ASICs or the firmware) from having to concern themselves with the vast space of consensus logic (handling transactions, merkle trees, etc). It is widely deployed in ASICs, but requires a substantial number of jobs fed across an entire device, keeping the ASIC controller busy. Providing additional nonce space for the ASICs to roll without needing fresh work from the controller may simplify ASIC design somewhat, and has been apparently adopted in some miners by using extra space in nTime as extra nonce space. Doing so in nVersion instead is preferable to using nTime. |
Also, for legibility of review comments, it would be preferable if you limited the length of the lines in the document.
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| License: BSD-3-Clause | ||
| CC0-1.0 |
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Since BIP3 deployed, we are using License Expressions for the License header values: https://github.com/bitcoin/bips/blob/master/bip-0003.md#specification-1
Suggested change
| License: BSD-3-Clause | |
| CC0-1.0 | |
| License: BSD-3-Clause OR CC0-1.0 |
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| Timo Hanke and Sergio Lerner for originally proposing 15-bit extra nNonce2. Btc Drak for writing BIP 320. | ||
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| ==Changelog== |
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Nit: It would be preferable to only add this section when it has content.
| Created: 2026-02-26 | ||
| License: BSD-3-Clause | ||
| CC0-1.0 | ||
| Replaces: 320 |
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I saw that this was discussed on the mailing list. Please add a Discussion header:
Suggested change
| Replaces: 320 | |
| Discussion: 2026-02-26: https://gnusha.org/pi/bitcoindev/6fa0cb45-37d6-4b41-9ff8-03730fd96d6e@mattcorallo.com/ | |
| Replaces: 320 |
Please also add the corresponding Proposed-Replacement header to BIP 320.
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