How Nexvault launched non-custodial MPC custody in 14 days
A rapidly growing crypto exchange needed to transition from omnibus hot wallets to non-custodial MPC custody ahead of a regulatory deadline — without service disruption or asset downtime.
What they were up against.
Regulatory deadline: non-custodial or close
New exchange regulations required proof of non-custodial segregation for all user assets within 30 days. Operating omnibus hot wallets was no longer legally viable.
Building in-house would take 18+ months
Their engineering team estimated 18 months and $1.5M to build MPC infrastructure from scratch — far beyond the regulatory window.
Zero downtime requirement
150K active users couldn't experience service interruption during migration. Deposits and withdrawals had to continue uninterrupted throughout.
Custody was a cost center, not a profit center
Their existing custody solution offered no fee monetization — they were leaving $300K+ in annual withdrawal fee revenue on the table.
BROsettlement deployed in parallel — zero disruption.
MPC 2-of-3 wallets migrated in parallel
New MPC wallets provisioned via API for all users. Deposits routed to new wallets while existing balances migrated gradually — zero downtime.
Immutable ledger activated day one
Every deposit, withdrawal, and internal transfer logged immutably from day one. Proof of reserves available on-demand for regulators.
Fee engine configured in hours
0.5% withdrawal fee with 70/30 platform/BroLabel split configured in a single API call. Monetization went live simultaneously with custody migration.
100+ chains supported immediately
No new chain integrations required — BROsettlement's multi-chain support covered all assets listed on the exchange out of the box.
How it fits into
their stack.
BroLabel integrated as an API layer between the client's product and the blockchain. Their team kept full control through RBAC — BroLabel handled MPC cryptography, multi-chain nodes, and compliance infrastructure.
The numbers.
We had 30 days to solve a problem that would normally take 18 months. BroLabel's team had us in production in 14 days. The fee engine alone will pay for the integration in year one.
Ready to launch?
Launch exchange custody in 14 days
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