Trustline provides a security layer for onchain services.
We check any interaction with your smart contract: transactions that move digital assets, like withdrawals, trades, lending and borrowing, and transactions that change ownership or control, like a change of administrator. Each one is verified against a set of rules adapted to your case, and anything that does not match does not execute.
Trustline provides you with the infrastructure to control your risk, and to prove that you control it. Your assets, your keys and your permissions stay with you.
What we do
You set the rules. We enforce them.
The blockchain itself is secure, and contract code is far safer than it used to be. Governance is where the risk still sits. Most of the money lost in this market goes out through the control layer: a stolen key, an admin call nobody checked. Trustline lets you define who can do what, then checks every call against those rules before it runs.
Permission
You decide who may call which functions, and on what conditions. The policy lives with the contract, not in a separate system that could be bypassed.
Verify
Before a call executes, we check it against your policy. Checks can include multi-factor approval, multi-signature rules, wallet and transaction screening, and transaction simulation.
Enforce
A cleared check produces a signed proof tied to that one transaction. Without the proof, the contract reverts. The rule is enforced onchain, and that proof is what makes your security setup provable to other stakeholders.
We help you set rules your stakeholders can actually understand, and we keep the record that shows those rules held. That is how you demonstrate your risk is properly managed, rather than asking investors, auditors and insurers to take your word for it.
Trustline covers infrastructure and access risk, sometimes called governance or operational risk. It does not cover market, credit or collateral risk, and it does not replace a security audit of your own contracts.
How it works
Four steps, enforced by the contract.
- 01
A call is attempted
A transfer, a trade or a withdrawal. A change of administrator. A mint or an upgrade. These are the calls where value and control actually sit.
- 02
We check it against your policy
The call is validated off-chain by an independent third party, before it reaches the network.
- 03
The transaction is validated, or blocked
If it clears your policy, it executes and a proof of validation is issued, tied to that one transaction. If it does not, the transaction is blocked and Trustline records what failed, so the history stays fully auditable.
- 04
The contract enforces the result
The function reverts unless a valid proof is attached. There is no way around the check.
A firewall for standard contracts
No code change is required for your smart contract. Trustline sits in front of what you already run and adapts to any existing contract, so you do not redeploy and you do not migrate anything.
Bespoke integration
In your own smart contract, developers add a requireTrustline() modifier to the functions that matter. One line of code, and your business logic does not change. The EVM SDK is published and documented.
A trusted third party
Trustline acts as a trusted third party for your operations. It proves to your stakeholders that the right policies are in place and that they are being followed.
Who it is for
Trustline is for digital asset services operating with smart contracts.
What our customers have in common is not the business line, it is the technology. If your operations run through smart contracts, the administrative layer is where your risk sits.
Trustline is for teams who need that security to be high, and who also need to prove it. Setting up your own controls and quietly carrying the risk yourself is not the same as being able to show a client, an investor or an auditor that the controls exist and are being followed.
Asset management
Pooling and managing investor capital in vaults.
Token issuance
Mint, burn and transfer controls on tokenised assets.
Lending and borrowing
Collateral, drawdown and liquidation logic.
OTC desks
Bilateral settlement without counterparty risk.
Trading services
Execution, rebalancing and treasury movements.
Escrow and settlement
Conditional release of assets between parties.
If it runs through a smart contract, it can be protected. The list above is where we see the most demand, not the limit of what we cover.
An example: a vault with Morpho
A Trustline-protected vault, running today.
We have built a Trustline-protected vault on Morpho, operating on HyperEVM and replicable on any EVM chain today. The manager keeps control of the vault and of the assets. The administrative layer is checked by us.
See how it worksPartners
We work with leading operators in the field.
Trustline is built on established contract standards and works alongside the networks, protocols and programmes our customers already use.
Network foundation
Ecosystem programme
Vault protocol
Contract libraries
Tokenisation
Exchange protocol
Protocol
Accelerator
Talk to us
For product, integration, partnership or company questions, write to us. Developer documentation is public.
About us
Trustline Digital Asset Ltd
We are a private limited company registered in the United Kingdom. We offer software as a service for permissioning and verification for smart contracts.
Trustline is built by an experienced team in security and onchain services, operating from London and Paris.
Certification and audit
- ISO 27001In progress
- SOC 2 Type IIIn progress
- Third-party security auditCompleted on our production contract
We will publish the reports once they are issued.