Ethereum geth startup node
make: * * [geth] error 1
there is no such directory, or the directory has insufficient permissions
graphics card, motherboard, power supply, CPU, memory, hard disk (more than 60g SSD is recommended), extension cable, adapter cable, etc
among them, the graphics card determines the speed of mining, and the motherboard and power supply largely determine the stability of mining machine operation.
A: generally, there is only one account address, otherwise there will be an error! blockchain itself is unique. If there are multiple account addresses on one node, it violates the fundamental principle of blockchain!
Generally speaking, the steps of deploying smart contract are as follows:
- start an Ethereum node (such as geth or testrpc)
- use Solc to compile smart contracts=& gt; Get the binary code
- deploy the compiled contract to the network This step will consume Ethernet currency, and you need to use the default address or specified address of your node to sign the contract.)=& gt; Get the blockchain address and ABI of the contract (JSON representation of the contract interface, including variables, events and callable methods) The author confused ABI with contract interface here. ABI is the binary representation of the contract interface.)
- use the JavaScript API provided by web3.js to call the contract Depending on the type of call, it may consume Ethernet currency.)
Ethereum specifies the JSON RPC API application development interface that each node needs to implement. This interface is transport independent. Applications can use this interface protocol to operate Ethereum nodes through HTTP, websocket or IPC and other communication mechanisms:
After Ethereum 2.0 goes online, the main way for ordinary people to play is to share the benefits of the network through the mortgage token. But if you want to make it clear, you have to understand the changes of Ethereum 2.0 network
ore pools. The deposit threshold is low, and you don't need to run the node yourself. A part of the revenue will become the service provider's service charge
decentralize wallets and service providers. Through the way of smart contract, we can realize the deposit and mining. As for the operation of the node, it is up to the service provider
platform side. No matter which way is mentioned above, someone is needed to run the node in the end. Therefore, some projects go down to the next level to act as the underlying infrastructure of all kinds of mortgage service providers, which are responsible for running the node and obtaining the income of handling charges
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system