WBTC input identity and handling
Wrapped Bitcoin is classified as a wrapped asset for this route. WBTC uses a wrapped contract asset on Base. The Base side is contract-tracked rather than a native gas balance. WBTC leaves through a custodial wrapper contract with token approval and source-chain gas; no native Bitcoin UTXO is spent by that transfer.
Receiving stablecoin USDC
USDC is an issued dollar-oriented stablecoin with canonical, native, and bridged variants across networks. Contract events and issuer controls differ from a network-native gas asset. The destination wallet must support the exact Scroll representation. The route converts a wrapped-asset source into a stablecoin balance; the destination ticker alone is not a contract check.
Base to Scroll L2 handoff
This route crosses two L2 execution environments. Base settles to ethereum, while Scroll settles to ethereum; each side keeps its own gas balance, token contracts, transaction hash, and settlement progress.
USDC output identity and receiving
USDC is classified as a stablecoin for this route. USDC uses a network-specific contract asset on Scroll. The recorded Scroll representation uses 6 decimal places. The wallet must support the destination USDC native label or contract. Receipt does not automatically supply the destination network’s gas asset.
Scroll destination execution
Scroll is a L2 EVM network in the Ethereum ecosystem. ETH pays destination-side network gas on Scroll. EVM 0x account address A Scroll receipt is an L2 native or contract balance whose proof settlement to Ethereum is a separate milestone; later activity uses ETH on Scroll.
Base source execution
Base is a L2 EVM network in the Ethereum ecosystem. ETH pays source-side network gas on Base. EVM 0x account address A Base source transaction is sequenced on the OP Stack rollup and later settles to Ethereum; Base ETH and Base token approvals remain on the L2 ledger.
WBTC unwrap or exchange input check
WBTC is a custodial tokenized Bitcoin representation on smart-contract networks. Its transfers use token contracts and approvals rather than native Bitcoin inputs and outputs. On this route WBTC is the source token on Base. Its token balance, approvals, and contract transfer behavior are separate from the native coin used for network gas.
Mistakes specific to WBTC Base to USDC Scroll
Route-specific mistakes include sending on a network other than Base; using a destination that is not valid for Scroll; running out of ETH before the source transaction is submitted; selecting a stablecoin by ticker without checking its network contract; treating a wrapped token as the native gas asset. A Base source transaction is sequenced on the OP Stack rollup and later settles to Ethereum; Base ETH and Base token approvals remain on the L2 ledger. WBTC leaves through a custodial wrapper contract with token approval and source-chain gas; no native Bitcoin UTXO is spent by that transfer. A Scroll receipt is an L2 native or contract balance whose proof settlement to Ethereum is a separate milestone; later activity uses ETH on Scroll. The wallet must support the destination USDC native label or contract. Receipt does not automatically supply the destination network’s gas asset.