Transaction Types

The ELA main chain supports 40+ transaction types beyond simple transfers. Each type has a unique hex code and carries a type-specific payload.

UTXO Model

The ELA main chain uses the UTXO model (like Bitcoin), not the account model used by Ethereum and ESC.

Base Transactions

Code	Name	Description
`0x00`	CoinBase	Block reward distribution
`0x01`	RegisterAsset	Register a new asset type
`0x02`	TransferAsset	Standard ELA transfer
`0x03`	Record	Data recording on-chain
`0x05`	SideChainPow	Sidechain PoW proof submission

Code	Name	Description
`0x06`	RechargeToSideChain	Deposit ELA to a sidechain
`0x07`	WithdrawFromSideChain	Withdraw ELA from a sidechain
`0x08`	TransferCrossChainAsset	Cross-chain transfer (user-facing deposit tx)
`0x2c`	ReturnCrossChainDepositCoin	Return failed cross-chain deposits
`0x51`	ReturnSideChainDepositCoin	Return failed sidechain deposits

Code	Name	Description
`0x09`	RegisterProducer	Register as a BPoS validator (requires deposit)
`0x0a`	CancelProducer	Cancel producer registration
`0x0b`	UpdateProducer	Update producer info (owner key, node key, URL)
`0x0c`	ReturnDepositCoin	Reclaim deposit after cancellation
`0x0d`	ActivateProducer	Re-activate after inactivity

Code	Name	Description
`0x0e`	IllegalProposalEvidence	Report conflicting DPoS proposals
`0x0f`	IllegalVoteEvidence	Report conflicting DPoS votes
`0x10`	IllegalBlockEvidence	Report conflicting blocks
`0x11`	IllegalSidechainEvidence	Report sidechain misbehavior
`0x12`	InactiveArbitrators	Mark inactive arbiters

Code	Name	Description
`0x21`	RegisterCR	Register as Council candidate
`0x22`	UnregisterCR	Unregister candidacy
`0x23`	UpdateCR	Update Council member info
`0x24`	ReturnCRDepositCoin	Reclaim Council deposit
`0x25`	CRCProposal	Submit a governance proposal
`0x26`	CRCProposalReview	Council member reviews a proposal
`0x27`	CRCProposalTracking	Track proposal milestone progress
`0x28`	CRCAppropriation	Appropriate funds from treasury
`0x29`	CRCProposalWithdraw	Request fund withdrawal
`0x2a`	CRCProposalRealWithdraw	Execute fund transfer
`0x2b`	CRAssetsRectify	Rectify CR asset UTXOs
`0x31`	CRCouncilMemberClaimNode	Council member claims DPoS node

Code	Name	Description
`0x41`	RevertToPOW	Switch consensus to pure PoW
`0x42`	RevertToDPOS	Restore DPoS consensus

Code	Name	Description
`0x60`	DposV2ClaimReward	Claim BPoS voter rewards
`0x61`	DposV2ClaimRewardRealWithdraw	Execute reward withdrawal
`0x62`	ExchangeVotes	Convert ELA to stake votes
`0x63`	Voting	Cast BPoS votes with lock time
`0x64`	ReturnVotes	Return staked votes
`0x65`	VotesRealWithdraw	Execute vote return

Code	Name	Description
`0x71`	CreateNFT	Create NFT from staking position
`0x72`	NFTDestroyFromSideChain	Destroy NFT returning from sidechain

Every main chain transaction contains:

Field	Description
Version	Transaction format version
TxType	Type code from the tables above
PayloadVersion	Version of the type-specific payload
Payload	Type-specific data
Inputs	UTXO references being spent
Outputs	New UTXOs being created
LockTime	Block height before which the tx cannot be mined
Programs	Signature scripts proving input ownership