New Taproot Activation Timeline Means the Upgrade Is (Probably) Coming to Bitcoin This Fall

Bitcoin’s developers and community members seem to have finally settled on a timeline to activate Taproot, Bitcoin’s biggest upgrade since SegWit in 2017.

During a public Internet Relay Chat (IRC) meeting, a code for Taproot was discussed where it is possible for the code to be activated in the Bitcoin Core client via a "Speedy Trial" by May.If Speedy Trial is successful, this would mean the upgrade could be online in November.

“There is broad agreement that we should target something like a May 1st release, with [a 1 week signalling start time afterwards],” Bitcoin Core contributor Jeremy Rubin wrote in meeting notes?? If successful, this would mean an “activation time of around Nov 15th,” he notes.

Speedy Trial allots a three-month trial period to see if miners representing at least 90% of Bitcoin’s hashrate will signal their support for the upgrade.Once this threshold is reached, Speedy Trial has been successful and the feature can be activated three months after it was initiated.After this, Taproot’s rules would be officially enforced in another three months.

As an example, if signalling begins on May 7 and miners show sufficient support, Taproot will be locked in by August 7 and go live by November 15; the later signalling begins, the later the activation).New code in Bitcoin Improvement Proposal 8 (BIP8) will set the parameters for the Taproot activation, which will judge when to lock in the upgrade based on block height.

As stakeholders appear to be in agreement on the timeline, bitcoiners finally have a (more or less) concrete deadline for when they can expect Taproot’s code to be available to the public to download, marking an end to what has become a painstaking road to a relatively simple upgrade.

Taproot activation’s and the long road to consensus

There is still the caveat that May 7 may not be the exact start date of Taproot’s activation, but it will likely be somewhere around that time.

As ever in Bitcoin’s development, upgrade parameters are in constant flux because no single person or organization has final say over how development should proceed?? It’s up to Bitcoin’s distributed, international community to come to a consensus on what changes to make to Bitcoin and, just as importantly, as evidenced by the Taproot activation discussion, how those changes will be brought online.

Take the so-called “user-activated soft fork” (UASF) that was so hotly debated during the Taproot activation discussions.??

Miners have given no indication, though, that they will reject Taproot, and the UASF proposal lacked enough support to make its way into Bitcoin Core, the software implementation that 99% of the Bitcoin network runs.

Still, Luke Dashjr and others are coding up a UASF that anyone can opt-in to (but which won’t be included into Bitcoin Core) in case Speedy Trial fails?? If Speedy Trial were to fail, then nothing would happen and Taproot would simply fail to activate; under this scenario, a UASF could be deployed, probably next year, to bring the upgrade online.

This is largely unlikely, however, given broad miner support for the uncontroversial upgrade.

Thanks to Ben Carman for feedback and input.