Transaction Management Move assets at the speed of code
Build, execute, and monitor the full transaction lifecycle across every blockchain through safe and reliable APIs.
Choose your
execution path
Transfers, custom payloads, raw signatures. Build with the level of control your workflow requires.
Send assets with one call. Specify the type, amount, and recipient. We do the rest.
Build the transaction. Control fees, nonce, and call data. We sign and broadcast it.
Execute freely on your side. You handle the transaction and broadcasting. We sign it.
Secure every
single transaction
Use scans, alerts, and policies to catch mistakes, fraud, and stop non-compliant transfers.
Detect errors, invalid calls, and high-risk outcomes before broadcast.
Decode smart contract interactions into readable terms. Verify what you sign.
Enforce limits, allowlists, approvals, ABI-aware rules, and custom controls.
Route assets where
they settle best
One interface for 100+ blockchains, tokens, settlement rails, and onchain markets.
Build across Ethereum, Solana, Bitcoin, Canton, and many more.
Move tokens through networks for payments, fiat ramps, and cross-chain swaps.
Connect transfers, swaps, DvP, sweeps, and deposits into one workflow.
Zero out
transaction failures
Control nonces, fees, retries, nodes, finality, and events with battle-tested infrastructure.
Track each transaction all the way with webhooks and idempotent requests.
Reserve nonces, fee sponsors, speed up, or cancel transactions in one call.
Reindex, reconstruct, fail over, and rebroadcast automatically—no support tickets.
Discover how Sphere powers payments on DFNS.
Discover how Fuze powers B2B2C banking on DFNS.
Sphere's collaboration with DFNS improved our payment rails by providing robust security, near-perfect uptime, and fast transaction processing. Their commitment to innovation and reliability not only enhances our efficiency but also sets a new industry standard, making them a vital partner.
Treasury Management 
Key Management Tenant-and-organization architecture built for B2B2C: each bank is an isolated organization under Fuze’s stack, inheriting wallet and custody infrastructure, so a new institution onboards as configuration.
“When a bank puts its brand on a digital asset product, every layer beneath has to survive regulatory review. DFNS is the control layer that governs how we move value. Their UAE-based MPC cluster and policy-driven signing let us give institutions sovereign-grade access to digital assets.”
Policy Engine 
- 01 · Compose
Build the transaction.
One call for a transfer, a contract call, or a signature. Asset, recipient, amount. Or full bytes.
- 02 · Evaluate
See it before it goes.
Simulate the result as a fork, decode the call into plaintext, and run the policy before a single byte goes onchain.
- 03 · Broadcast
Sign, sequence, send.
Nonces and UTXO are reserved atomically, fees estimated and applied, nodes geo-redundant with active-active failover.
- 04 · Track
Watch it land. Recover if it doesn't.
Webhooks fire on every state change. Stuck transactions will be reindexed, retried, sped up, or cancelled. Observable end to end.
