Notes from the
payments edge.
What we learn shipping crypto money-movement at scale: postmortems, network deep-dives, compliance notes, and field lessons.
Changelog: Q2 2026 SPL settlements, batch v2, EU MiCA notes
Solana SPL is now a first-class settlement rail, batch payouts get idempotent re-submission, and MiCA Phase 2 affects our roadmap.
A stablecoin payroll playbook for distributed teams
How three remote-first companies replaced SWIFT and EOR fees with USDC payouts, including the tax and accounting plumbing nobody tells you about.
Designing webhooks that survive everything
Idempotency keys, signed envelopes, exponential backoff with jitter, and the moment your queue catches fire at 03:14 UTC. Lessons from the halfin event bus.
MiCA Phase 2, in plain English
The CASP licence track, stablecoin reserve rules, and what changes for merchants accepting EUR-denominated crypto invoices in the EU.
How fiat-anchored invoices actually price themselves
A look under the hood at the rate window, settlement tolerance, and why a 90-second TTL is the right answer for almost everyone.
Closing 4,000 sellers a week without losing your mind
A marketplace finance lead walks through their batch-payout reconciliation, dispute window, and the single Postgres view they wish they'd built sooner.
Your first hour in the halfin sandbox
A guided tour: create a key, fire an invoice, simulate a confirmation, replay a webhook. Everything you need to demo a flow before standup.