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How config is actually initialized when using Ethereum on the mainnet. Where the variables are defined from the mainnet initialization. Below is the config struct from the first link above. The intention in adding it was to make transactions on the Ethereum network look different from those on the Ethereum classic network.
Transactions are signed differently depending on the chainID used. This is expected, and the mainnet gensis configuration also has this set to 0. Some background: In , the DAO created a wildly successful smart contract for funding dApps and providing contributors a sort of equity stake in those dApps through DAO tokens.
This contract was a novel idea that raised unprecedented amounts of ether. Unfortuneately, an attacker discovered an attack vector that allowed ether to be withdrawn from the contract multiple times in exchange for the same DAO tokens. Millions were stolen. Ultimately, a majority of Ethereum users voted to create a hard fork in the blockchain that would invalidate what the attackers did, and the contract would be updated.
Since the majority voted to proceed with this fork, the DAOForkBlock variable was born, and it occured on the th block in the mainnet. NewInt Thus, any block mined after this one would have to follow the protocols established by this new fork, and would be rejected otherwise. If we were creating a local Ethereum chain to test on, we might set this value to 0 so that we get the most up-to-date transaction behavior from the get-go rather than use an outdated protocol for the first blocks.
Ethereum is open-source, so people make proposals in the form of discussions and code. Some are accepted, others rejected. EIP is one such proposal that was accepted. This EIP took effect on block , and had mostly to do with increasing gas prices in response to denial-of-service concerns. This new protocol began treating them as nonexistent, saving space on the blockchain.
Other tools and offerings from Etherscan. Image via Etherscan Why should I use Etherscan? It is one of the most valuable tools for navigating the crypto space. I use it extensively to look up information on tokens, contract addresses and even NFTs. Using Etherscan equips you to have an idea of navigating other blockchain explorers.
Some of them, like Polygon, Binance Smart Chain, and others, are close copies of the Ethereum format. Other blockchains that use the account-based style also share many similarities with Etherscan. How to view transactions on Etherscan One of the most-used functions in Etherscan is viewing transactions. You can think of it as a receipt number of sorts. It either gets recorded on the blockchain or not. It is possible that these tokens were transacted on a blockchain network different from where the wallet address is located.
Block — this indicates the block the transaction was first recorded on. The number of confirmations is like how many copies of the ledger also recorded this information on their end. Timestamp — when the transaction took place. From — the sending wallet address. Interacted With — for ERC20 transactions, the contract address for the token is listed here. Tokens Transferred — Here is a clear view of the comings and goings of the transaction.
It shows the sending and receiving wallet address, the type of token involved in the transaction, and the amount. Value — This is only populated when the asset involved is ETH. Transaction fee — The amount paid to the miner for processing the transaction, usually paid by the sender. Below is a quick breakdown of what each of these terms means. Gas prices are the real transactional costs to a transaction made on the blockchain.
Gas price — How much it costs to send a transaction through per unit of gas. Note that the complexity of the transaction determines the gas price, not the value of the transaction. Most of the time, this is determined by the entity that created the wallet address, like MetaMask, Ledger etc.
This often occurs when interacting with a smart contract. Remember, the complexity of what needs to be executed drives up the price. Gas Fees — what the user is willing to pay in ETH for each unit of gas. This is also where users can have a say regarding how quickly they want a transaction to get pushed through. How to view a Wallet on Etherscan To look up a wallet address on Etherscan, enter it in the search bar on the main page.
Token — Here is the list of ERC20 tokens in the wallet and their balance, together with the number of assets. The dropdown list gives a breakdown of the amount and fiat value of each asset. Checking Wallet History Moving down further, there are a few tabs that may or may not appear with each wallet address, depending on what kind of transactions have been made. Different type of headings based on the asset type in the transactions The Transactions page refers only to transactions involving ETH.
As you can see, there are separate headings for each type of ERC token involved in transactions. The format for each of the asset-type is similar: Txn Hash — the transaction ID for each transaction. Click on it to view the transaction itself or you can right-click on the ID to copy it. Method — the purpose of the transaction.
Block — which block the transaction was first recorded in. Age — how long ago did the transaction occur. From — where was the funds sent from. To — where the funds are sent to. Value — The transaction amount.
Txn fee — how much this transaction cost when it happened. The page displaying information about the token. If you want to know whether a token is a possible scam or not, this would be the page to check it out. No Official Site listed. May not have any Social Profiles.
If there are profiles listed do click on the links to confirm. All wallet addresses have both Analytics and Comments sections. The former gives you data about the wallet like fees or balance etc. Some stats about the wallet address can be found here The latter is for anyone to comment on this address.
Most of the information is read-only but there are a few things you can do on your side. Review the contents of the contract address here. In the Overview section, basic information is provided about the token and the address. Further down is where the fun starts. Write Contract is where you connect your Web3 wallet to the contract to interact with it for things like approving the contract on your wallet etc.
Basic interactions with the contract address in this page The key things in our exploration are: name — The name of the project, i.
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