BlockchainIntermediate#Payments#Self-Custody#Smart Accounts
Self-Custodial Card
S
Definition
A payment card whose spending balance stays in a smart-contract account controlled by the user's own keys, instead of being held by the card issuer.
Verified by CryptoLV Alpha
Concept Diagram
Key Takeaways
1
The spending balance stays in a user-controlled smart account, not with the issuer.
2
Removes the counterparty risk that custodial crypto cards carry.
3
Spending permissions are enforced on-chain via pre-authorized limits.
4
Trade-off: more technical setup and limited supported assets (usually specific stablecoins).
Practical Example
A Gnosis Pay user holds EURe in their Safe on Gnosis Chain. When they tap the card for a 40 EUR purchase, the pre-authorized payment module debits exactly 40 EURe from the Safe — the issuer never has custody of the rest of the balance.
Finished learning?
Related Terms
AI
Agentic WalletA crypto wallet controlled by an AI agent (usually using ERC-4337 or MPC) permitted to sign transactions for specific strategies without human intervention.
Blockchain
StablecoinA cryptocurrency designed to have a stable price, typically by being pegged to a reserve asset such as the US Dollar.
Related Deep Dives
Master the hub of Blockchain
Explore all our strategic guides about Blockchain to take your operations to the next level.
View all articles