Ethereum: How can I decode the output of the first call and use it to send a transaction?

Ethereum transaction output decoding and transaction transaction

Ethereum’s smart contract platform allows developers to interact with decentralized applications (DAPP) using a programming language called Solidity. When designing a smart contract, you can call the features in the accounts to obtain data or make calculations. In this article, we will look at how to decode the first call output and use it to send the transaction.

Understanding the output of the transaction

Calling a feature in the Ethereum account, the result is usually in a hexadecimal format, which denotes the transaction hash. Hexadecimal value can be transformed into a series of readable people using different tools. Here are some common ways to decode the output:

• Use eth.accounts.hex (console) to get a transaction ID

• Use Web3.eth.GettransactionRecipt () to obtain an object of receiving the transaction, and then Transaction.rawtransaction" returning raw transaction data, including hash

Dispatch of transaction

To send the transaction to Ethereum, you will need to set up a signed contract placement using the following:

• Write your stability code in a file with extension.Sol

• Use a tool such as a truffle or remix to collect and place a contract

• Sign the contract with your private key

After placing, you can call the view features in the account that owns the contract using the following syntax:

SOLIDITY

Agreement Exam with Agreement {

Hello () Public PURE RETURNS (string memory) {

come back “Hello, the world!”;

}

}

Function Gethash (address) Public view returns (byte memory) {

// Suppose

bytes memory TXID = transaction.rawtransaction [0] .Hex;

// now you can use the transaction ID to decode the first call output

string memory hashid.plit (“”) [1];

return hash;

}

`

In this example, we assume that we have addresses that correspond to their respective transaction ID. We then use this mapping to obtain a hexadecimal value that denotes the transaction hash.

By sending x Wei

To send X Wei to the address, you will need to set up a signed contract using the following syntax:

`SOLIDITY

Contract MyContract {

Function Sendwei (address recipient, Uint256 sum) Society’s purely return (BOOL) {

request (amount> 0, “the amount must be positive”);

// sign the deal with your private key

BAITS32 Signature = KECCAK256 (both.Encodepacked (

msg.sender,

amount,

Block.The Tastamp

));

// sign the contract with your private key and add a new deal

transaction = (msg.sender, recipient, 0, blockhash, blocknumber, null, 0, signature);

}

}

`

In this example, we assume that we have addresses that correspond to their respective transaction ID. We then use this mapping to obtain a hexadecimal value that denotes the transaction hash and sign the contract with your private key.

Tools

Here are some popular tools for working with Ethereum:

• [Trifele] (

• [Remix] (

• [Etherscan] (

• [Web3.Js] (

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