The Vault adds Solana support: SOL, USDC and USDT under institutional controls

Solana has become one of the main networks for moving stablecoins, valued for fast confirmation and low transaction costs. For institutions, that creates a practical problem: if counterparties pay or expect payment on Solana, holding those assets outside the main custody platform means working around the controls that govern everything else. This release removes that gap. Clients can now create Solana wallets, receive and send SOL, and work with supported SPL tokens, including USDC and USDT, directly on The Vault.

Built into existing workflows, not bolted on

Solana is not a separate module with its own rules. Every Solana operation follows the same path as any other asset on the platform: transfer preparation, approval, recipient verification, signing and on-chain tracking. Organisations keep the roles, approval chains and segregation of duties they have already configured, so adding a new network does not mean designing a new control process or retraining the team.

Checks enforced before signing

Before any Solana transaction is signed, the platform validates the transfer parameters, confirms that the recipient is on the approved whitelist and checks that available funds cover the amount together with network fees. Problems are caught before a signature exists, not discovered after a transaction fails or reaches the wrong address.

Solana handles tokens differently from most networks: to receive a given token, a recipient needs a dedicated token account for it. When clients send supported tokens to a recipient who does not yet have one, the platform creates it automatically as part of the transfer. After sending, the system tracks each transaction until it reaches finality on the network, so teams can see when a transfer is actually complete.

Ed25519 in our MPC signing engine

Solana uses the Ed25519 signature algorithm, so The Vault extended its MPC distributed-signing infrastructure to support it. As with every network on the platform, keys are split into shares and never assembled in one place. Solana keys are held separately from keys on other networks, and connecting Solana requires no changes to existing keys or wallets: current setups stay exactly as they are.

Full support in the mobile signer

The Vault mobile app supports the full lifecycle of Solana key shares: signing operations, backing up shares and restoring them. Approvers can confirm Solana transactions from their own devices in the same way they approve activity on other networks.

The Solana integration broadens The Vault's ability to support multiple blockchain networks within a single custody platform, giving institutions one place and one set of controls for the assets they hold and move.