BTCWithdrawalDustAmount is the minimum satoshis that can be withdrawn from zEVM to avoid outbound dust output The Bitcoin protocol sets a minimum output value to 546 satoshis (dust limit) but we set it to 1000 satoshis.

CmdMigrateERC20CustodyFunds is used for CCTX of type cmd to give the instruction to the TSS to transfer its funds on a new address.

CmdMigrateTssFunds is used for CCTX of type cmd to give the instruction to the TSS to transfer its funds on a new address.

CmdUpdateERC20CustodyPauseStatus is used for CCTX of type cmd to give the instruction to the TSS to update the pause status of the ERC20 custody contract.

CmdWhitelistERC20 is used for CCTX of type cmd to give the instruction to the TSS to whitelist an ERC20 on an exeternal chain.

DonationMessage is the message for donation transactions Transaction sent to the TSS or ERC20 Custody address containing this message are considered as a donation.

EVMZeroAddress is the zero address for EVM address format.

OptionPause is the argument used in CmdUpdateERC20CustodyPauseStatus to pause the ERC20 custody contract.

OptionUnpause is the argument used in CmdUpdateERC20CustodyPauseStatus to unpause the ERC20 custody contract.

SolanaWalletRentExempt is the minimum balance for a Solana wallet account to become rent exempt The Solana protocol sets minimum rent exempt to 890880 lamports but we set it to 1_000_000 lamports (0.001 SOL) The number 890880 comes from CLI command `solana rent 0` and has been verified on devnet gateway program.

ZetaBlockTime is the block time of the ZetaChain network It's a rough estimate that can be used in non-critical path to estimate the time of a block.