Bitcoin UTXO and account-chain boundary
Bitcoin uses a UTXO source model while zkSync Era uses a non-UTXO destination model. Native Bitcoin deposits require a supported Bitcoin address, confirmation-aware input handling, and attention to change outputs; an EVM token labeled BTC or WBTC is not native BTC.
zkSync Era receipt-side execution
zkSync Era is a L2 EVM network in the Ethereum ecosystem. ETH pays destination-side network gas on zkSync Era. EVM 0x account address A zkSync Era receipt belongs to EraVM account state and uses ETH for later fees; proof settlement to Ethereum remains distinct from L2 delivery.
Bitcoin deposit-side execution
Bitcoin is a L1 Bitcoin Script network in the Bitcoin ecosystem. BTC pays source-side network gas on Bitcoin. Native Bitcoin address supported by the route, including network-specific bech32 or legacy formats A Bitcoin source spends UTXOs, creates a fee-bearing transaction and possible change, and waits for the route provider’s confirmation depth.
From Bitcoin L1 into zkSync Era L2
Bitcoin source execution occurs on L1, while zkSync Era delivery occurs on a separate L2 ledger that settles to ethereum. BTC pays source gas and ETH is the destination gas asset; identical-looking wallet addresses do not merge the balances or transaction histories.
Choose an asset that exists on both route sides
The live quote lists the exact Bitcoin input asset and zkSync Era output representation. A shared ticker is not proof of a shared contract, native ledger, decimals, or wallet support.
Bitcoin to zkSync Era bridge mistakes
Route-specific mistakes include sending on a network other than Bitcoin; using a destination that is not valid for zkSync Era; running out of BTC before the source transaction is submitted; assuming bitcoin and evm addresses are interchangeable. A Bitcoin source spends UTXOs, creates a fee-bearing transaction and possible change, and waits for the route provider’s confirmation depth. A zkSync Era receipt belongs to EraVM account state and uses ETH for later fees; proof settlement to Ethereum remains distinct from L2 delivery.