Atomic Wallet’s Multi-Signature Support What You Need to KnowAtomic Wallet’s Multi-Signature Support What You Need to Know
ATOMIC WALLET’S MULTI-SIGNATURE SUPPORT: WHAT YOU NEED TO KNOW
Multi-signature (multi-sig) wallets add a security layer by requiring multiple approvals before a transaction executes. Atomic Wallet integrates this feature for users who need shared control over funds without sacrificing self-custody. Below are the seven most critical questions about Atomic’s multi-sig support, answered directly and concisely.
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WHAT IS MULTI-SIGNATURE SUPPORT IN ATOMIC WALLET?
Multi-signature in Atomic Wallet means a transaction needs approval from two or more private keys before it can send funds. This prevents a single point of failure—no single person can move assets without consensus. Atomic implements this through a 2-of-3 or 3-of-5 key setup, depending on your security needs.
Atomic’s multi-sig is not a separate wallet type but a transaction rule applied to any supported asset. When you create a multi-sig address, the wallet generates a unique script that enforces the approval threshold. This script is stored on-chain, so the rule persists even if you switch devices or reinstall the app.
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WHICH CRYPTOCURRENCIES SUPPORT MULTI-SIG IN ATOMIC WALLET?
Atomic Wallet’s multi-sig works with Bitcoin (BTC), Litecoin (LTC), and Bitcoin Cash (BCH). These networks natively support multi-sig scripts, so transactions are processed on-chain without intermediaries. Ethereum (ETH) and ERC-20 tokens do not support multi-sig in Atomic because Ethereum uses smart contracts instead of script-based multi-sig.
The wallet’s interface only shows multi-sig options for supported assets. If you select an unsupported coin, the multi-sig toggle disappears. This prevents confusion and ensures you don’t accidentally create an invalid transaction. Always check the asset list before setting up a multi-sig address.
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HOW DO I SET UP A MULTI-SIG WALLET IN ATOMIC?
Open Atomic Wallet, go to the “Wallet” tab, and select a supported asset like Bitcoin. Click the three-dot menu and choose “Create Multi-Signature Address.” You’ll need to define the approval threshold (e.g., 2-of-3) and enter the public keys of all participants. Atomic generates a multi-sig address once all keys are added.
Each participant must share their extended public key (xpub) with the group. Atomic displays this key in the wallet settings under “Backup.” Never share your private key—only the xpub is needed for multi-sig setup. Once the address is created, all future transactions from it will require the specified number of approvals.
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HOW DOES TRANSACTION APPROVAL WORK IN ATOMIC’S MULTI-SIG?
When someone initiates a transaction from a multi-sig address, Atomic creates a partially signed transaction (PSBT). This file is shared with the other key holders, who must sign it using their own Atomic Wallet or compatible software. Once the required signatures are collected, the transaction broadcasts to the network.
Atomic does not store multi-sig transactions on its servers. The PSBT file is generated locally and must be shared manually via email, messaging apps, or file transfer. This keeps the process decentralized but requires coordination between all parties. If a key holder loses access, the funds become inaccessible unless a backup key exists.
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WHAT HAPPENS IF I LOSE ACCESS TO MY MULTI-SIG KEY?
If you lose access to one key in a 2-of-3 setup, the remaining two keys can still approve transactions. In a 3-of-5 setup, you’d need three of the remaining four keys. However, if you lose enough keys to fall below the threshold (e.g., two keys in a 2-of-3), the funds become permanently locked.
Atomic does not recover lost multi-sig keys. The wallet’s seed phrase only restores single-signature addresses, not multi-sig setups. Always back up all xpubs and private keys offline. Consider using a hardware wallet for one of the keys to reduce the risk of loss. Test small transactions before moving large amounts.
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CAN I USE HARDWARE WALLETS WITH ATOMIC’S MULTI-SIG?
Yes, Atomic supports multi-sig with hardware wallets like Ledger and Trezor. You’ll need to export the xpub from the hardware wallet and import it into Atomic during setup. When signing a transaction, the hardware wallet user must approve it on their device before the PSBT is finalized.
This adds an extra security layer because hardware wallets keep private keys offline. Atomic’s multi-sig works with any wallet that supports PSBT, including Electrum and Coldcard. Always verify the multi-sig address on the hardware wallet before sending funds to it. Never assume the address displayed in Atomic is correct without cross-checking.
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HOW DO I RECOVER A MULTI-SIG WALLET IF I REINSTALL ATOMIC?
Reinstalling Atomic does not delete your multi-sig setup, but you must restore it manually. Open the wallet, go to the multi-sig address, and re-enter the xpubs of all participants. Atomic will regenerate the same multi-sig address if the xpubs and threshold match the original setup.
If you don’t have the xpubs backed up, you cannot recover the multi-sig address. The wallet’s seed phrase only restores single-signature addresses. Always store xpubs in a secure, offline location. Consider printing them or saving them in an encrypted file. Without the xpubs, the multi-sig address and its funds are lost forever.
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WHAT ARE THE LIMITATIONS OF ATOMIC’S MULTI-SIG SUPPORT?
Atomic’s multi-sig is limited to Bitcoin, Litecoin, and Bitcoin Cash. It does not support Ethereum, ERC-20 tokens, or other smart contract platforms. The wallet also lacks advanced features like time-locked transactions or custom script templates, which are available in dedicated multi-sig tools like Electrum.
Another limitation is the manual PSBT sharing process. Atomic does not integrate with multi-sig coordinators like Caravan or Specter, so users must handle file transfers themselves. This can be cumbersome for groups with frequent transactions. For complex setups, consider using a dedicated multi-sig service alongside Atomic.
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IS ATOMIC’S MULTI-SIG SAFE FOR LARGE TRANSACTIONS?
Atomic’s multi-sig is safe for large transactions if set up correctly. The 2-of-3 or 3-of-5 threshold prevents unauthorized access, and the PSBT process ensures no single party can broadcast a transaction alone. However, safety depends on key management—losing too many keys locks funds permanently.
For maximum security, use hardware wallets for at least one key and store backups in geographically separate locations. Avoid using multi-sig with uns
ATOMIC WALLET’S MULTI-SIGNATURE SUPPORT: WHAT YOU NEED TO KNOW
Multi-signature (multi-sig) wallets add a security layer by requiring multiple approvals before a transaction executes. Atomic Wallet integrates this feature for users who need shared control over funds without sacrificing self-custody. Below are the seven most critical questions about Atomic’s multi-sig support, answered directly and concisely.
—
WHAT IS MULTI-SIGNATURE SUPPORT IN ATOMIC WALLET?
Multi-signature in Atomic Wallet means a transaction needs approval from two or more private keys before it can send funds. This prevents a single point of failure—no single person can move assets without consensus. Atomic implements this through a 2-of-3 or 3-of-5 key setup, depending on your security needs.
Atomic’s multi-sig is not a separate wallet type but a transaction rule applied to any supported asset. When you create a multi-sig address, the wallet generates a unique script that enforces the approval threshold. This script is stored on-chain, so the rule persists even if you switch devices or reinstall the app.
—
WHICH CRYPTOCURRENCIES SUPPORT MULTI-SIG IN ATOMIC WALLET?
Atomic Wallet’s multi-sig works with Bitcoin (BTC), Litecoin (LTC), and Bitcoin Cash (BCH). These networks natively support multi-sig scripts, so transactions are processed on-chain without intermediaries. Ethereum (ETH) and ERC-20 tokens do not support multi-sig in Atomic because Ethereum uses smart contracts instead of script-based multi-sig.
The wallet’s interface only shows multi-sig options for supported assets. If you select an unsupported coin, the multi-sig toggle disappears. This prevents confusion and ensures you don’t accidentally create an invalid transaction. Always check the asset list before setting up a multi-sig address.
—
HOW DO I SET UP A MULTI-SIG WALLET IN ATOMIC?
Open Atomic Wallet, go to the “Wallet” tab, and select a supported asset like Bitcoin. Click the three-dot menu and choose “Create Multi-Signature Address.” You’ll need to define the approval threshold (e.g., 2-of-3) and enter the public keys of all participants. Atomic generates a multi-sig address once all keys are added.
Each participant must share their extended public key (xpub) with the group. Atomic displays this key in the wallet settings under “Backup.” Never share your private key—only the xpub is needed for multi-sig setup. Once the address is created, all future transactions from it will require the specified number of approvals.
—
HOW DOES TRANSACTION APPROVAL WORK IN ATOMIC’S MULTI-SIG?
When someone initiates a transaction from a multi-sig address, Atomic wallet download creates a partially signed transaction (PSBT). This file is shared with the other key holders, who must sign it using their own Atomic Wallet or compatible software. Once the required signatures are collected, the transaction broadcasts to the network.
Atomic does not store multi-sig transactions on its servers. The PSBT file is generated locally and must be shared manually via email, messaging apps, or file transfer. This keeps the process decentralized but requires coordination between all parties. If a key holder loses access, the funds become inaccessible unless a backup key exists.
—
WHAT HAPPENS IF I LOSE ACCESS TO MY MULTI-SIG KEY?
If you lose access to one key in a 2-of-3 setup, the remaining two keys can still approve transactions. In a 3-of-5 setup, you’d need three of the remaining four keys. However, if you lose enough keys to fall below the threshold (e.g., two keys in a 2-of-3), the funds become permanently locked.
Atomic does not recover lost multi-sig keys. The wallet’s seed phrase only restores single-signature addresses, not multi-sig setups. Always back up all xpubs and private keys offline. Consider using a hardware wallet for one of the keys to reduce the risk of loss. Test small transactions before moving large amounts.
—
CAN I USE HARDWARE WALLETS WITH ATOMIC’S MULTI-SIG?
Yes, Atomic supports multi-sig with hardware wallets like Ledger and Trezor. You’ll need to export the xpub from the hardware wallet and import it into Atomic during setup. When signing a transaction, the hardware wallet user must approve it on their device before the PSBT is finalized.
This adds an extra security layer because hardware wallets keep private keys offline. Atomic’s multi-sig works with any wallet that supports PSBT, including Electrum and Coldcard. Always verify the multi-sig address on the hardware wallet before sending funds to it. Never assume the address displayed in Atomic is correct without cross-checking.
—
HOW DO I RECOVER A MULTI-SIG WALLET IF I REINSTALL ATOMIC?
Reinstalling Atomic does not delete your multi-sig setup, but you must restore it manually. Open the wallet, go to the multi-sig address, and re-enter the xpubs of all participants. Atomic will regenerate the same multi-sig address if the xpubs and threshold match the original setup.
If you don’t have the xpubs backed up, you cannot recover the multi-sig address. The wallet’s seed phrase only restores single-signature addresses. Always store xpubs in a secure, offline location. Consider printing them or saving them in an encrypted file. Without the xpubs, the multi-sig address and its funds are lost forever.
—
WHAT ARE THE LIMITATIONS OF ATOMIC’S MULTI-SIG SUPPORT?
Atomic’s multi-sig is limited to Bitcoin, Litecoin, and Bitcoin Cash. It does not support Ethereum, ERC-20 tokens, or other smart contract platforms. The wallet also lacks advanced features like time-locked transactions or custom script templates, which are available in dedicated multi-sig tools like Electrum.
Another limitation is the manual PSBT sharing process. Atomic does not integrate with multi-sig coordinators like Caravan or Specter, so users must handle file transfers themselves. This can be cumbersome for groups with frequent transactions. For complex setups, consider using a dedicated multi-sig service alongside Atomic.
—
IS ATOMIC’S MULTI-SIG SAFE FOR LARGE TRANSACTIONS?
Atomic’s multi-sig is safe for large transactions if set up correctly. The 2-of-3 or 3-of-5 threshold prevents unauthorized access, and the PSBT process ensures no single party can broadcast a transaction alone. However, safety depends on key management—losing too many keys locks funds permanently.
For maximum security, use hardware wallets for at least one key and store backups in geographically separate locations. Avoid using multi-sig with uns