architecture
modules
crosschain
Messages

AddOutboundTracker adds a new record to the outbound transaction tracker. only the admin policy account and the observer validators are authorized to broadcast this message without proof. If no pending cctx is found, the tracker is removed, if there is an existed tracker with the nonce & chainID.

message MsgAddOutboundTracker {
	string creator = 1;
	int64 chain_id = 2;
	uint64 nonce = 3;
	string tx_hash = 4;
	pkg.proofs.Proof proof = 5;
	string block_hash = 6;
	int64 tx_index = 7;
}

AddInboundTracker adds a new record to the inbound transaction tracker.

message MsgAddInboundTracker {
	string creator = 1;
	int64 chain_id = 2;
	string tx_hash = 3;
	pkg.coin.CoinType coin_type = 4;
	pkg.proofs.Proof proof = 5;
	string block_hash = 6;
	int64 tx_index = 7;
}

RemoveOutboundTracker removes a record from the outbound transaction tracker by chain ID and nonce.

Authorized: admin policy group 1.

message MsgRemoveOutboundTracker {
	string creator = 1;
	int64 chain_id = 2;
	uint64 nonce = 3;
}

VoteGasPrice submits information about the connected chain's gas price at a specific block height. Gas price submitted by each validator is recorded separately and a median index is updated.

Only observer validators are authorized to broadcast this message.

message MsgVoteGasPrice {
	string creator = 1;
	int64 chain_id = 2;
	uint64 price = 3;
	uint64 priority_fee = 6;
	uint64 block_number = 4;
	string supply = 5;
}

VoteOutbound casts a vote on an outbound transaction observed on a connected chain (after it has been broadcasted to and finalized on a connected chain). If this is the first vote, a new ballot is created. When a threshold of votes is reached, the ballot is finalized. When a ballot is finalized, the outbound transaction is processed.

If the observation is successful, the difference between zeta burned and minted is minted by the bank module and deposited into the module account.

If the observation is unsuccessful, the logic depends on the previous status.

If the previous status was PendingOutbound, a new revert transaction is created. To cover the revert transaction fee, the required amount of tokens submitted with the CCTX are swapped using a Uniswap V2 contract instance on ZetaChain for the ZRC20 of the gas token of the receiver chain. The ZRC20 tokens are then burned. The nonce is updated. If everything is successful, the CCTX status is changed to PendingRevert.

If the previous status was PendingRevert, the CCTX is aborted.

Only observer validators are authorized to broadcast this message.

message MsgVoteOutbound {
	string creator = 1;
	string cctx_hash = 2;
	string observed_outbound_hash = 3;
	uint64 observed_outbound_block_height = 4;
	uint64 observed_outbound_gas_used = 10;
	string observed_outbound_effective_gas_price = 11;
	uint64 observed_outbound_effective_gas_limit = 12;
	string value_received = 5;
	pkg.chains.ReceiveStatus status = 6;
	int64 outbound_chain = 7;
	uint64 outbound_tss_nonce = 8;
	pkg.coin.CoinType coin_type = 9;
}

VoteInbound casts a vote on an inbound transaction observed on a connected chain. If this is the first vote, a new ballot is created. When a threshold of votes is reached, the ballot is finalized. When a ballot is finalized, a new CCTX is created.

If the receiver chain is ZetaChain, HandleEVMDeposit is called. If the tokens being deposited are ZETA, MintZetaToEVMAccount is called and the tokens are minted to the receiver account on ZetaChain. If the tokens being deposited are gas tokens or ERC20 of a connected chain, ZRC20's deposit method is called and the tokens are deposited to the receiver account on ZetaChain. If the message is not empty, system contract's depositAndCall method is also called and an omnichain contract on ZetaChain is executed. Omnichain contract address and arguments are passed as part of the message. If everything is successful, the CCTX status is changed to OutboundMined.

If the receiver chain is a connected chain, the FinalizeInbound method is called to prepare the CCTX to be processed as an outbound transaction. To cover the outbound transaction fee, the required amount of tokens submitted with the CCTX are swapped using a Uniswap V2 contract instance on ZetaChain for the ZRC20 of the gas token of the receiver chain. The ZRC20 tokens are then burned. The nonce is updated. If everything is successful, the CCTX status is changed to PendingOutbound.

Only observer validators are authorized to broadcast this message.

message MsgVoteInbound {
	string creator = 1;
	string sender = 2;
	int64 sender_chain_id = 3;
	string receiver = 4;
	int64 receiver_chain = 5;
	string amount = 6;
	string message = 8;
	string inbound_hash = 9;
	uint64 inbound_block_height = 10;
	uint64 gas_limit = 11;
	pkg.coin.CoinType coin_type = 12;
	string tx_origin = 13;
	string asset = 14;
	uint64 event_index = 15;
	ProtocolContractVersion protocol_contract_version = 16;
	RevertOptions revert_options = 17;
	CallOptions call_options = 18;
	bool is_cross_chain_call = 19;
}

WhitelistERC20 deploys a new zrc20, create a foreign coin object for the ERC20 and emit a crosschain tx to whitelist the ERC20 on the external chain

Authorized: admin policy group 1.

message MsgWhitelistERC20 {
	string creator = 1;
	string erc20_address = 2;
	int64 chain_id = 3;
	string name = 4;
	string symbol = 5;
	uint32 decimals = 6;
	int64 gas_limit = 7;
}

UpdateTssAddress updates the TSS address.

message MsgUpdateTssAddress {
	string creator = 1;
	string tss_pubkey = 2;
}

MigrateTssFunds migrates the funds from the current TSS to the new TSS

message MsgMigrateTssFunds {
	string creator = 1;
	int64 chain_id = 2;
	string amount = 3;
}

AbortStuckCCTX aborts a stuck CCTX Authorized: admin policy group 2

message MsgAbortStuckCCTX {
	string creator = 1;
	string cctx_index = 2;
}

RefundAbortedCCTX refunds the aborted CCTX. It verifies if the CCTX is aborted and not refunded, and if the refund address is valid. It refunds the amount to the refund address and sets the CCTX as refunded. Refer to documentation for GetRefundAddress for the refund address logic. Refer to documentation for GetAbortedAmount for the aborted amount logic.

message MsgRefundAbortedCCTX {
	string creator = 1;
	string cctx_index = 2;
	string refund_address = 3;
}

UpdateRateLimiterFlags updates the rate limiter flags. Authorized: admin policy operational.

message MsgUpdateRateLimiterFlags {
	string creator = 1;
	RateLimiterFlags rate_limiter_flags = 2;
}

MigrateERC20CustodyFunds migrates the funds from the current ERC20Custody contract to the new ERC20Custody contract

message MsgMigrateERC20CustodyFunds {
	string creator = 1;
	int64 chain_id = 2;
	string new_custody_address = 3;
	string erc20_address = 4;
	string amount = 5;
}

UpdateERC20CustodyPauseStatus creates a admin cmd cctx to update the pause status of the ERC20 custody contract

message MsgUpdateERC20CustodyPauseStatus {
	string creator = 1;
	int64 chain_id = 2;
	bool pause = 3;
}