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Settle OTC trades without going first

Overview

Sable Vault is a private escrow for SOL block trades on Solana mainnet. A seller locks SOL in a freshly generated vault wallet and receives a Vault Note. The buyer pastes the note, pays in USDC or tBTC, and a single atomic transaction sends the quote tokens to the seller and the SOL to the buyer. Either both sides settle, or nothing happens.

Wallets & network

Connect Phantom or Solflare. All transactions run on Solana mainnet with real funds. Keep a small SOL balance for network fees on both sides.

Create a Vault Order

  1. Open the app and choose Create.
  2. Enter the SOL amount, the quote token (USDC or tBTC) and the total price.
  3. Approve the deposit in your wallet. SOL moves into a new vault wallet.
  4. Copy the Vault Note and share it privately with your counterparty.

The Vault Note

The note starts with sable-vault- and encodes the vault key, price, quote token and your payout address. It is the key to the escrow: anyone holding it can move the vaulted SOL. Only share it with the intended buyer, over a channel you trust.

Pay & Settle

  1. Open the app and choose Fulfill.
  2. Paste the Vault Note and review the amount, price and token.
  3. Connect a wallet holding the quote tokens and approve Pay & Settle.
  4. One transaction pays the seller and delivers SOL to you. A Solscan link confirms it.

Supported tokens

  • Base: SOL
  • Quote: USDC and tBTC (SPL tokens on Solana)

Fees

The protocol fee is 0.25% of the trade, shown in the fee breakdown before you sign. Standard Solana network fees apply.

Security model

Settlement is atomic: the payment and the SOL delivery happen in the same transaction. The trust point is the Vault Note itself — whoever holds it controls the vault. Start with small amounts, verify every detail before signing, and never post a note publicly.

Troubleshooting

  • Note not accepted: notes must start with sable-vault-.
  • Transaction fails: check you hold enough quote tokens plus SOL for fees, then retry.
  • Questions: reach us on X @SableVault.