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Bitcoin deposit fees #248

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Feb 22, 2024
Merged

Bitcoin deposit fees #248

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Bitcoin deposit fees
fadeev Feb 6, 2024
8662c89
add deposit formula
fadeev Feb 19, 2024
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Merge branch 'main' into bitcoin-fee
fadeev Feb 20, 2024
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11 changes: 11 additions & 0 deletions docs/developers/omnichain/zrc-20.md
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Expand Up @@ -65,6 +65,17 @@ correspond to a contract address on ZetaChain, the token will be deposited to
that contract and the `onCrossChainCall` function of that contract will be
called with the remaining input data as the `message`.

When depositing native gas tokens from EVM-based connected chains, there is no
additional cross-chain fee. If you send 1 token to a TSS address, you will
receive 1 ZRC-20 version of the same token on ZetaChain.

For Bitcoin deposits, which utilize the UTXO (Unspent Transaction Output) model,
the process incurs additional fees. Unlike EVM-based chains, each deposited
Bitcoin output incurs a fee when it is spent. To address this, both the
depositor and the withdrawer share the cost of the spend. This fee is charged in
advance as a deposit fee. Currently, the rate is set at 20 satoshis per virtual
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byte (sats/vB), but it may vary according to market conditions.

## Depositing Supported ERC-20 Tokens as ZRC-20

To deposit a supported ERC-20 token to ZetaChain, use the `deposit` method of
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