[Fix/stacks] transaction broadcast API error (#9137)

[hedi-edelbloute]

• fix(stx): broadcast failure due to wrong fee

• chore: changeset

✅ Checklist

• npx changeset was attached.
• Covered by automatic tests.
• Impact of the changes:
  • ...

📝 Description

Original PR: #9137

❓ Context

• JIRA or GitHub link:

---

🧐 Checklist for the PR Reviewers

• The code aligns with the requirements described in the linked JIRA or GitHub issue.
• The PR description clearly documents the changes made and explains any technical trade-offs or design decisions.
• There are no undocumented trade-offs, technical debt, or maintainability issues.
• The PR has been tested thoroughly, and any potential edge cases have been considered and handled.
• Any new dependencies have been justified and documented.
• Performance considerations have been taken into account. (changes have been profiled or benchmarked if necessary)

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[github-actions]

[Bot] Testing with 'Nitrogen' ($0.00) ⏲ 1524ms

What is the bot and how does it work? Everything is documented here!

1 critical spec errors

Spec Stacks failed!

Error: speculos process failure. vnc_server: readall: connection closed

Details of the 0 mutations

Spec Stacks (failed)

Details of the 1 uncovered mutations

Spec Stacks (1)

• Send 50%~:

Portfolio ($0.00) – Details of the 1 currencies

Spec (accounts)	State	Remaining Runs (est)	funds?
Stacks (0)	0 ops , 🤷‍♂️	❌	``

Performance ⏲ 1524ms

Time spent for each spec: (total across mutations)

Spec (accounts)	preload	scan	re-sync	tx status	sign op	broadcast	test	destination test
TOTAL	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Stacks (0)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

What is the bot and how does it work? Everything is documented here!

[github-actions]

[Bot] Testing with 'Nitrogen' ($0.00) ⏲ 1429ms

What is the bot and how does it work? Everything is documented here!

1 critical spec errors

Spec Stacks failed!

Error: speculos process failure. vnc_server: readall: connection closed

Details of the 0 mutations

Spec Stacks (failed)

Details of the 1 uncovered mutations

Spec Stacks (1)

• Send 50%~:

Portfolio ($0.00) – Details of the 1 currencies

Spec (accounts)	State	Remaining Runs (est)	funds?
Stacks (0)	0 ops , 🤷‍♂️	❌	``

Performance ⏲ 1429ms

Time spent for each spec: (total across mutations)

Spec (accounts)	preload	scan	re-sync	tx status	sign op	broadcast	test	destination test
TOTAL	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Stacks (0)	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

What is the bot and how does it work? Everything is documented here!