# Glossary

### Implementation Contract

A contract structure using the delegatecall function of Solidity. Contract Function Update is available.

It is divided into a Data Management Contract and Function Management Contract.

### Message Multi-Sig Wallet

The Message Multi-Sig Wallet Contract is a fabricated form of Contract from a Multi-Sig Wallet Contract. A verification function for a particular hash message is added. 

### Governance

Groups that use the Orbit Bridge system to manage and enforce Bridging requests.

### Governance ID

Bridge Governance Unique Identifier of Orbit Bridge System

* Definition : `sha256(abi.encodePacked(OrbitHubContractAddress, chainSymbol, vault))`

### Chain ID

Unique Identifier for Managing Chain Symbols of String Type in Contract

* Ethereum Chain Symbol : `ETH` 
* Klaytn Chain Symbol : `KLAYTN` 
* Terra Chain Symbol : `TERRA` 
* Definition : `sha256(abi.encodePacked(contractAddress, chainSymbol))`

### Token Summary

Unique Identifier for Managing Token Information of Bytes Type in Contract

* Ethereum Token Information : Token Contract Address ( exception,  eth : zero address )
* Klaytn Token Information : Token Contract Address ( exception, klay : zero address )
* Terra Token Information : Denom
* Definition : `sha256(abi.encodePacked(chainSymbol, tokenInformation))`

### fromChain

Chain Symbol with Bridging Request Catching

* Lock Process of Vault Contract
* Burn Process of Minter Contract

### toChain

Chain Symbol with Bridging Execution

* Release Process of Vault Contract
* Mint Process of Minter contract

### fromAddr

FromChain Address of the user who requested Bridging

### toAddr

ToChain Address to execute Bridging Request

### Suggestion / Selection Data

Used in Chains requiring agreement on Raw Transaction

* Suggestion : Law Transaction Data Proposed by Bridge Operator
* Selection : Law Transaction Data agreed by Bridge Validator

### ERC-20

ERC-20 tokens are fungibile tokens on Ethereum.

### KIP-7

KIP-7 tokens are fungibile tokens on Klaytn.

### IRC-2

IRC-2 tokens are fungibile tokens on Icon.


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