Software for crypto exchanges and wallets — deposits, withdrawals and custody, built to be audited.
Deposit detection, withdrawal queues with approval, hot-to-cold sweeping, on-chain monitoring and the encryption around keys and customer data. BTC, ETH and TRX today; other chains per project.
- Chains
- Bitcoin · Ethereum · Tron
- Tokens
- ERC-20 · TRC-20 (USDT and others)
- Custody
- Your keys, your policy
- Security
- ICEBERG · HSM/KMS hooks
Where exchanges and wallets carry the most risk.
- 01
Deposits credited late or twice
Confirmation policies per chain, reorg handling and idempotent crediting. We build detection as a state machine with the evidence for every credit.
- 02
Withdrawals are a manual risk
Hot-wallet limits, approval tiers, velocity checks and address allow-lists, with a queue that pauses itself when something looks wrong.
- 03
Hot wallet holds too much
Automatic sweeping to cold or treasury wallets with thresholds, batching and fee estimation you can tune.
- 04
Keys and secrets handled ad hoc
Key generation, storage and rotation designed with your HSM or KMS, and ICEBERG for channels that carry sensitive material.
- 05
Support cannot see what happened
An internal console that shows every transaction's on-chain state, our state, and the difference — so support answers in minutes.
What we build for exchanges and wallet products.
Deposit gateway
HD-wallet address generation, mempool and confirmation tracking, reorg safety, idempotent crediting.
Learn moreWithdrawal engine
Queues, approval tiers, limits, velocity and address checks, fee estimation, batching.
Learn moreSweeping & treasury
Hot-to-cold sweeps on thresholds, treasury dashboard, balance alerts.
Learn moreOn-chain monitoring
Address and contract watchers, alerts, and reconciliation between chain state and your ledger.
Learn moreKey & data security
ICEBERG for sensitive channels, encrypted storage for customer documents, key rotation runbooks.
Learn moreWallet app
Flutter or native wallet apps with Privyie-style device binding, PIN protection and encrypted backups.
Learn morePayments engineers who also ship encryption.
- Our crypto gateway on BTC, ETH and TRX is in production, with sweeping, monitoring and reconciliation
- ICEBERG and Privyie are our own — device binding, per-item PINs and encrypted cloud storage are patterns we have shipped
- We build the internal console alongside the gateway, because support and compliance need it on day one
- You keep the keys; we never take custody
Relevant work
- Crypto payment gateway — BTC, ETH, TRX with sweeping and monitoring
- Privyie — secure cloud authenticator with per-item PINs
- ICEBERG — layered encryption protocol
Typical stack
Asked by exchange and wallet teams.
Which chains are supported?
Bitcoin, Ethereum (with ERC-20 tokens) and Tron (with TRC-20 tokens) are live. Other chains are added per project.
Do you run nodes for us?
We can deploy and monitor nodes in your infrastructure, or integrate with node providers where that is the better trade-off.
How are reorgs handled?
Confirmation policy per chain, and credits are only final after the policy is met; a reorg before that reverses the pending credit with a logged reason.
Can you integrate with our HSM or KMS?
Yes. Key generation and signing stay in your HSM or KMS; our services orchestrate around them.
What about compliance screening?
KYC/AML and address-screening providers are integrated as hooks in the deposit and withdrawal flows where your licence requires them.
Is there a mobile wallet?
Yes — Flutter or native, sharing the same backend, with the device binding and PIN model we built for Privyie.
Running an exchange or a wallet?
Tell us which chains and which flows. We will scope the deposit, withdrawal and custody pieces separately so you can start with the highest-risk piece.