Spark USDC wallet

What is Spark USDC (SUSDC)?

sUSDC is what a USDC deposit into Spark's savings vault turns into. It follows the ERC-4626 tokenized vault standard, which matters more than it sounds: the vault share is an ordinary transferable ERC-20, so it can be moved, held by a contract, or used as collateral elsewhere without unwinding the deposit first.

The mechanic to understand is the redemption rate. sUSDC does not rebase and does not split into more tokens. The quantity in the wallet stays exactly as it was; what changes is how much USDC each sUSDC converts back into when it is redeemed. That is why the balance line may look frozen while the underlying claim is not. It also means sUSDC is not a one-to-one dollar token: quoting it as if it were USDC will understate or overstate what is actually there.

Because it sits behind Spark's link to the Sky ecosystem, redemption goes through the Spark contracts. Exchanges that list USDC will not accept sUSDC, and gas is paid in ETH.

Networks supported for this asset in Tangem (1): Ethereum.

Nothing needs to be signed, claimed or refreshed for the conversion rate to keep moving. The Tangem app simply reads the current state from the network when it opens, so a card left in a drawer for months shows an accurate picture the moment you look, which suits an asset whose whole design is to be left alone.