Send an Ethereum
Eth is a kind of digital token of Ethereum,
developers need to pay eth to support the application
like other digital currencies, ether currency can be traded on the trading platform
generally speaking, Ethereum is an open source platform, digital currency and blockchain platform,
it provides developers with a platform to build and publish applications on blockchain
Ethereum can be used to program, distribute, guarantee and trade anything, including voting, domain names, financial exchanges, crowdfunding, corporate management, contracts and most of the agreements, intellectual property, and smart assets that benefit from hardware integration
at present, China bitcoin trading platform (chbtc) has opened the Ethernet currency trading function,
supports eth / CNY trading and eth three times leverage, supports interest free lending, and the handling charge is as low as 0 yuan
according to the report, Zhejiang blockchain government platform is mainly engaged in blockchain bills, especially medical bills. The public platform of Changsha's SMIC blockchain mainly focuses on government information disclosure, government affairs handling, intellectual property protection, judicial expertise, finance and so on, but it has not involved the medical bills yet.
1、 Yintong, Southeast Development Zone, Changshu City, Suzhou city to Public Security Bureau Station:
bus line: Changshu 125, about 8.3km
1. Walk about 140m from laoyinpu (yintong) to Xiaokang Village Vegetable Farm Station
2. Take Changshu 125, pass 16 stops, and reach Xinyan Road Station of Dongming hospital
3. Walk about 380m to Public Security Bureau
2 Public Security Bureau to Shanghai Mercedes Benz cultural center
{rrrrrrr}
bus line: Changshu 202 road → Kunshan 121 road → Kunshan 104 road → Kunshan 155 road → Metro Line 11 → Metro Line 8, the whole journey is about 134.8km
< P > 1. Walk 540 meters from the public security bureau to the Public Security Bureau Station2. Take Changshu 202 Road, pass 42 stops, and reach jiangxiangcun station
3 Take Kunshan No.121, pass 7 stops to Shibei Huayuan station
4, take Kunshan No.104, pass 18 stops to municipal government west station
5, take Kunshan No.155, pass 9 stops to rail transit Guangming Road Station
6, walk about 10 meters to Guangming Road Station
7, take Metro Line 11, pass 25 stops to Oriental Sports Center Station
8, take Metro Line 8, pass 4 stops, Arrive at the Chinese Art Palace Station
9, walk about 660 meters to Shanghai Mercedes Benz cultural center
hope to adopt
Transaction
the behavior of blockchain transaction follows different rule sets
< UL >e to the distributed and unlicensed nature of public blockchain, anyone can sign the transaction and broadcast it to the network
according to different blockchains, traders will be charged a certain transaction fee, which depends on the needs of users rather than the value of assets in the transaction
blockchain transactions do not require any central authority verification. It only needs to use the digital signature algorithm (DSA) corresponding to its blockchain to sign it with the private key
once a transaction is signed, broadcast to the network and mined into a successful block in the network, the transaction cannot be recovered
Ethereum transaction structure
Ethereum transaction data structure: transaction 0.1 eth
{& 39; nonce': 39; 0x00', // Decimal: 0
& 39; gasLimit': 39; 0x5208', // Decimal system: 21000
& 39; gasPrice': 39; 0x3b9aca00', // Decimal system: 10000000000
& 39; to': 39; 39; ,// Sending address
& 39; value': 39; 0x16345785d8a0000',// 100000000000000000 ,10^17
' data': 39; 0x', // Decimal representation of null data; chainId': 1 / / blockchain network ID
}
these data have nothing to do with the transaction content, but have something to do with the execution mode of the transaction. This is because when you send a transaction in Ethereum, you must define some other parameters to tell miners how to handle your transaction. Transaction data structure has two attribute designs & quot; gas": & quot; gasPrice",& quot; gasLimit"
" gasPrice": The unit is Gwei, which is 1 / 1000 eth, indicating the transaction cost
& quot; gasLimit": The maximum gas charge allowed for the transaction
these two values are usually filled in automatically by the wallet provider
in addition, you need to specify which Ethereum network to execute the transaction (chainid): 1 represents the Ethereum main network
ring development, tests are usually carried out locally and on the test network, and transactions are carried out through the test eth issued by the test network to avoid economic losses. After the test, enter the main network transaction
in addition, if you need to submit some other data, you can use & quot; data" And & quot; nonce" Attach as part of a transaction
a nonce (number used only once) is the value used by Ethereum to track transactions, which helps to avoid double spending and replay attacks in the network
Ethereum transaction signature
Ethereum transaction involves ECDSA algorithm. Taking JavaScript code as an example, the popular ethers.js is used to call ECDSA algorithm for transaction signature
you can use the online application composer to deliver signed transactions to Ethereum. This is known as "offline signature.". Offline signatures are particularly useful for applications such as status channels, which are smart contracts that track the balance between two accounts and transfer funds after a signed transaction is submitted. Offline signature is also a common practice in dexes
you can also use online wallet to create signature verification and broadcast through Ethereum account
with Portis, you can sign a transaction to interact with the gas station network (GSN)
< / UL >
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