Update spec to 1.4.15

[sleepdefic1t]

Fixes # .

Motivation

Schnorr BIP-340 support in mesh-sdk-go first requires the addition of the appropriate curve and signature types found in the current specifications release.

Solution

Update mesh specification to 1.4.15 as discussed in #500

• adds BIP-340 support to CurveType and SignatureType

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 -1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[potterbm-cb]

This looks good to me, but I'll defer to @jingweicb or @GeekArthur for the changes to types/*

[sleepdefic1t]

Thank you, @potterbm-cb

I'll keep an eye out for any updates here 👍

[jingweicb]

Hi @sleepdefic1t , how did you test the pr? can you add the testing in pr discriptions?

[sleepdefic1t]

Hi @sleepdefic1t , how did you test the pr? can you add the testing in pr discriptions?

I'm not sure I follow, @jingweicb

This PR only updates the spec version used by the SDK, what should be tested?

---

Our proposal to add BIP-340 support was shared by @GeekArthur here:

• https://github.com/coinbase/mesh-specifications/discussions/113

Perhaps that discussion can provide clarity.

[sleepdefic1t]

@jingweicb

Just following up. Since there are no functional changes and no existing tests apply to this PR, would you prefer to merge this as-is, or are there adjustments you’d like to address first?

I'm ready to proceed whenever you are.

[jingweicb]

Hi @sleepdefic1t , how did you test the pr? can you add the testing in pr discriptions?

I'm not sure I follow, @jingweicb

This PR only updates the spec version used by the SDK, what should be tested?

Our proposal to add BIP-340 support was shared by @GeekArthur here:

• Add Support for BIP-340 Schnorr mesh-specifications#113

Perhaps that discussion can provide clarity.

Hi @GeekArthur , I think this pr matches the discussion raised by you, can you take a look?

I am ok once the pr can add the missing fields back also I suggest a test of derive endpoint as mentioned here https://github.com/coinbase/mesh-sdk-go/pull/509#discussion_r1838530603

[sleepdefic1t]

Hello @jingweicb @GeekArthur

I'd like to keep the momentum going here so that we may continue with adding BIP-340 support.

Please let me know how you'd like to proceed.

• https://github.com/coinbase/mesh-sdk-go/pull/509#pullrequestreview-2430307509
• https://github.com/coinbase/mesh-sdk-go/pull/509#pullrequestreview-2430442380
• https://github.com/coinbase/mesh-sdk-go/pull/509#issuecomment-2471374262

[sleepdefic1t]

Hello @jingweicb @GeekArthur

Just following up again.

Please let me know how you'd like to proceed with this PR.

[sleepdefic1t]

Hello again, @GeekArthur and @jingweicb,

Please let me know how to proceed with this.

It’s been over two years since the work to add BIP-340 support was greenlit, and I’d greatly appreciate further direction on moving this forward.

[NayiemWillems]

Hello @GeekArthur and @jingweicb,

Any update on this PR? We are still waiting :(