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Finding the Sender Address from a Transaction Hash
When you use the Blockchain.info API or any other third-party service to receive payments on the Ethereum network, you cannot directly access the sender address from the transaction hash. Here’s why:
- Transaction hashes are one-way hashes: They are created using complex mathematical algorithms that make them immutable and difficult to reverse.
- Sender information is not stored in transaction hashes
: The Blockchain.info API provides various data points about the transaction, such as the sender address, the recipient address, and more. However, these are usually used for authentication or to display certain information during the payment processing phase.
If you want to find the sender address from the transaction hash, you need to perform additional steps:
Method 1: Using Transaction Hash to Extract the Sender Address (Optional)
Unfortunately, it is not possible to extract the sender address directly from the transaction hash without additional information. The hash is intended to identify the transaction and its associated information, but it does not contain any personal information about the sender.
Method 2: Using the Blockchain.info API (with additional steps)
You can receive payments and store the sender address via the Blockchain.info API by following these steps:
- Create an account at Blockchain.info
: Sign up for a free account to use the API.
- Verify your account: Complete the verification process to receive an API key and secret.
- Use Ethereum API: Make a “GET” request to ” where “/0x…” is your Ethereum address.
The response will contain information about your balance, including the sender address associated with your account. You can then use this information to update your payment record on Blockchain.info.
{
"address": "0x...",
"balance": "...",
"sender": {
"address": "...", // sender's Ethereum address
"name": "", // optional (last name and first name)
"publicKey": "" // optional (Ethereum public key)
}
}
- Save sender address: Update your payment record on Blockchain.info to include the sender address.
Note: The response address field contains a shortened Ethereum address, which can be used as is or concatenated with other addresses using hexadecimal notation (e.g. “0x…”).
By following these steps, you can obtain and store the sender address associated with your Ethereum account via the Blockchain.info API.