Bridge User Guide

The Memora bridge moves assets from other chains onto the Canton Network, and back. The chain an asset comes from is its origin chain. On Canton, each asset is issued as its own token, one for one: SOL from Solana arrives as SOLx. You bridge yourself, from your own wallets, in one interface. We never hold your funds and never sign on your behalf: your wallet on the origin chain signs the deposit, and your Canton wallet signs the redemption.

Examples use SOL on Solana. Each origin chain goes through the same stages, and the app names the chain and the asset.

Supported chains

Each origin chain has its own vault, its own identifiers on Verified Deployments, and its own rates and limits on Fees and Limits. We add a chain to this table when it opens for deposits.

A bridged token redeems only to its own origin chain. SOLx redeems to SOL on Solana.

Before you start

A wallet on the origin chain

Chain notes lists the wallets each chain supports. Install the wallet and unlock it before you begin.

A Canton wallet

The bridge connects to Canton wallets through PartyLayer, which implements the Canton wallet connection standard (CIP-0103), so it works with the wallets PartyLayer supports: Console Wallet, 5N Loop, Cantor8, Bron, Nightly, Cauri Wallet, OneSwap V2 Wallet, Send and Walley, and other Canton wallets over WalletConnect. PartyLayer keeps the current list on its site. If you do not have a Canton wallet yet, create one first. The bridge cannot create a Canton identity for you.

What a Canton party is

On Canton your identity is a party, written as a name followed by a fingerprint, for example alice::1220ab.... A party holds tokens on Canton, so a deposit goes to a party ID, not to an address. Your Canton wallet shows your party ID. The bridge fills it in when you connect.

Check the bridge is accepting transfers

The bridge checks its own health before you sign anything. If it cannot complete a transfer end to end, the app disables the button to start one and shows the reason in its place. See Status.

What you agree to

Using the bridge means agreeing to the Terms of Use, which include the Bridge Risk Disclosure. Read the risks before your first transfer.

Where the app lives

The app lives at one address: Coming soon. We never ask you to send tokens directly to a vault address, and never contact you first to ask you to bridge. Verified Deployments lists the addresses that make up the real bridge.

Deposit: onto Canton

1. Connect your wallet on the origin chain and your Canton wallet. The app fills in the Canton recipient from your connected wallet. You can enter a different Canton party ID if you are sending to someone else.
2. Enter the amount to bridge. The app shows the minimum accepted deposit under the field. You can type the amount in the asset or, when a live price is available, in US dollars.
3. Review the transfer. The review screen lists the bridge fee, the network fee, your wallet's own gas, the estimated time, and what will arrive on Canton. Nothing has been sent yet.
4. Approve in your wallet. Your wallet on the origin chain shows one transaction. Approving it is the only action that moves funds.
5. Approve the transfer in your Canton wallet. Once the token is issued, it arrives as a transfer offer to your party, and it is not in your balance until you accept it. The app tells you when the offer is ready. See Activity and resuming.

Origin chain

Attestors

Canton

1. 01Origin chain·You

   You sign one transaction

   • in your origin-chain wallet
   • names your Canton party
   • the only step that moves funds

2. 02Origin chain

   Deposit

   • fees split off
   • net amount locked in the vault
   • below the minimum, it reverts
   Finalized
   Finalized

3. 03Attestors

   Independent attestations

   • each attestor records the amount, recipient and transaction
   Threshold agrees
   Threshold agrees

4. 04Canton

   Threshold check

   • attestations must agree
   • each deposit recorded once

5. 05Canton

   Token issued

   • exactly the net amount
   • sent to your party as a transfer offer

6. 06Canton·You

   You approve the transfer

   • accept it in your Canton wallet
   • until then it is not in your balance
   • re-offered if it expires

Before you sign, the app checks that the bridge can complete the transfer end to end, and shows every fee and exactly what will arrive.

The app then tracks the transfer through four stages:

The step people miss: accept the offer in your Canton wallet. On Canton, tokens you have not accepted are not yet in your balance. When the fourth stage completes, the app retitles it, for example "SOLx offer created", and shows the deadline to accept. Open your Canton wallet, find the incoming transfer, and accept it. The app then shows "SOLx delivered" and the tokens appear in your balance.

The offer stays open for seven days. If it expires, the bridge re-offers it automatically, and the deposit stays in the vault in the meantime. The app puts it this way: "The bridge re-offers an expired transfer for up to 7 days. Your funds are not lost. If it stays unaccepted past that, contact support with the reference below to recover the deposit."

If the "Verifying" or "Issuing" stage takes longer than usual, the app says so: "This is taking longer than usual. Your funds are safe: they stay in the bridge until the transfer completes, and it will resume on its own." You do not need to do anything, and you must not start a second deposit.

Redeem: back to the origin chain

1. Connect your Canton wallet. Your bridged token balances load from the ledger.
2. Enter the amount to redeem. The app shows the minimum under the field. Each token's minimum is on Fees and Limits. The maximum is the lower of your balance and what the vault can release right now, which the app reads live before it lets you continue.
3. Choose the destination on the origin chain. By default it is your connected wallet on that chain. You may enter a different address, for example an exchange deposit address. The app shows a prominent warning when the destination is not the connected wallet, and a Use connected wallet button that restores the safe default in one click. Check a pasted address carefully: once the vault has released funds to an address, the release cannot be reversed.
4. Review and approve. Your Canton wallet shows one transfer for the amount you entered, to the bridge's receiver party. The bridge never signs with your authority. The app prepares the transfer, checks that what it prepared matches what you typed, and hands it to your wallet to sign.

Origin chain

Attestors

Canton

1. 01Canton·You

   You sign one transfer

   • in your Canton wallet, to the bridge
   • names your destination address

2. 02Canton

   Token burned

   • before anything is released
   • redemption recorded once
   Burned
   Burned

3. 03Attestors

   Release signed

   • a threshold of attestors sign
   • the origin chain checks each signature
   Threshold signs
   Threshold signs

4. 04Origin chain

   Vault pays out

   • net amount to your destination
   • each release paid once

5. 05Origin chain·You

   Funds arrive

   • at your destination address
   • the receipt links the payout

Before you sign, the app reads what the vault can release right now, and will not let you redeem more.

The app tracks two stages:

The receipt shows the payout transaction on the origin chain, which you can open in any explorer for that chain.

Reading the review screen

Each figure has a one-sentence definition in the app. The same definitions apply here.

On a deposit, the review screen also states the most the network fee can be. The network fee is repriced from live network costs. You sign a ceiling, and the vault charges the live value at the moment your transaction lands, never more than the ceiling. See Fees and Limits for worked examples.

Activity and resuming

The app keeps an activity log in your browser. Closing the tab does not affect a transfer's outcome: once your wallet has signed, the transfer completes on its own, and reopening the app resumes tracking from where it was.

Each receipt carries up to three references. Give support whichever one you have.

The app names the chain in the first and last labels, for example "Solana deposit". These are the identifiers the ledgers themselves use. They are long, but anyone can check them independently.

Desktop notifications

You can turn on desktop notifications for the moments a transfer needs you, such as an offer to accept. The app delivers them while the tab is open, including in the background, and stops when you close it. There is no push subscription and nothing runs when the tab is closed. If notifications are on but none appear, your system may be hiding them. The app can send a test notification so you can check.

What each message means

The app does not show raw wallet or network errors. Each message below is the exact text you may see, and what it means for your funds.

If your Canton wallet session expires while the app is open, the app asks you to reconnect before any signing action.

Each message includes a "View technical details" disclosure with the original error text, which you can copy for support. The messages for connecting a wallet on the origin chain name the wallet. Chain notes lists them for each chain.

Chain notes

What differs from one origin chain to the next. Everything else on this page applies to every chain.

Solana

Native SOL is wrapped inside your own deposit transaction and unwrapped on release, so you never hold wrapped SOL yourself.

The connection messages name your wallet. With Phantom they read:

Getting help

The support channel is Coming soon. Give support the reference from your receipt. Never share your wallet's secret recovery phrase with anyone, including us. Support will never ask for it.