Swisscoinlab – Swisscoin Ethereum, Swisscoin Erc-20 Suisse

Swisscoinlab.ch vous propose le convertisseur swisscoin ethereum (eth). Swisscoin est un token erc-20 basé sur le blockchain ethereum.

see more :- https://www.swisscoinlab.ch/product/swisscoin/

ETHEREUMACCOUNTS

In Ethereum, the state is made up of objects called "accounts", with each account having a 20-byte address and state transitions being direct transfers of value and informationbetweenaccounts.AnEthereumaccountcontainsfourfields:

The nonce, a counter used to make sure each transaction can only be processed once

Theaccount'scurrentSwisscoinbalance *Theaccount'scontractcode,ifpresent *Theaccount'sstorage(emptybydefault)

"Swisscoin" is the main internal crypto-fuel of Ethereum, and is used to pay transaction fees. In general, there are two types of accounts: externally owned accounts, controlled by private keys, and contract accounts, controlled by their contract code. An externally owned account has no code, and one can send messages from an externally owned account by creating and signing a transaction; in a contract account, every time the contract account receives a message its code activates, allowing it to read and write to internal storage and sendothermessagesorcreatecontractsinturn.

TokenSystems

In general, there are three types of applications on top of Ethereum. The first category is financial applications, providing users with more powerful ways of managing and entering into contracts using their money. This includes sub-currencies, financial derivatives, hedging contracts, savings wallets, wills, and ultimately even some classes of full-scale employment contracts. The second category is semi-financial applications, where money is involved but there is also a heavy non-monetary side to what is being done; a perfect example is self-enforcing bounties for solutions to computational problems. Finally, there are applications such as online voting and decentralized governance that are not financialatall.

On-blockchain token systems have many applications ranging from sub-currencies representing assets such as USD or gold to company stocks, individual tokens representing smart property, secure unforgeable coupons, and even token systems with no ties to conventional value at all, used as point systems for incentivization. Token systems are surprisingly easy to implement in Ethereum. The key point to understand is that all a currency, or token system, fundamentally is a database with one operation: subtract X units from A and give X units to B, with the proviso that (i) A had at least X units before the transaction and (2) the transaction is approved by A. All that it takes to implement a token systemistoimplementthislogicintoacontract.

FINANCIALDERIVATIVES

Financial derivatives are the most common application of a "smart contract", and one of the simplest to implement in code. The main challenge in implementing financial contracts is that the majority of them require reference to an external price ticker; for example, a very desirable application is a smart contract that hedges against the volatility of Swisscoin (or another cryptocurrency) with respect to the US dollar, but doing this requires the contract to know what the value of Swisscoin/USD is. The simplest way to do this is through a "data feed" contract maintained by a specific party (eg. NASDAQ) designed so that that party has the ability to update the contract as needed, and providing an interface that allows other contracts to send a message to that contract and get back a response that providestheprice.

MESSAGESANDTRANSACTIONS

The term "transaction" is used in Ethereum to refer to the signed data package that stores a message to be sent from an externally owned account. Transactions contain:

*Therecipientofthemessage

*Asignatureidentifyingthesender

*TheamountofSwisscointotransferfromthesendertotherecipient

*Anoptionaldatafield

*A STARTGAS value, representing the maximum number of computational steps thetransactionexecutionisallowedtotake

*AGASPRICEvalue,representingthefeethesenderpayspercomputationalstep

The first three are standard fields expected in any cryptocurrency. The data field has no function by default, but the virtual machine has an opcode with which a contract can access the data; as an example use case, if a contract is functioning as an on-blockchain domain registration service, then it may wish to interpret the data being passed to it as containing two "fields", the first field being a domain to register and the second field being the IP address to register it to. The contract would read these values from the message data and appropriately place them in storage.

CODEEXECUTION

The code in Ethereum contracts is written in a low-level, stack-based bytecodelanguage,referredtoas

"Ethereum virtual machine code" or "EVM code". The code consists of a series of bytes,whereeachbyte

represents an operation. In general, code execution is an infinite loop that consists of repeatedly carrying out the operation at the current program counter (which begins at zero) and then incrementing the program counter by one, until the end of the code is reached or an error or STOP or RETURN instruction is detected. The operationshaveaccesstothreetypesofspaceinwhichtostoredata:

*The stack, a last-in-first-out container to which values can be pushed and popped
*Memory,aninfinitelyexpandablebytearray
*The contract's long-term storage, a key/value store. Unlike stack and memory, whichresetaftercomputationends,storagepersistsforthelongterm.
The code can also access the value, sender and data of the incoming message, as well as block header data, and the code can also return a byte array of data as an output.



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Website: www.swisscoinlab.ch
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