December 2018
Beginner to intermediate
564 pages
17h 34m
English
Content preview from Blockchain Developer's Guide
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Retrieving gas price, balance, and transaction details
Let's take a look at the APIs to retrieve the gas price, the balance of an address, and information on a mined transaction:
//It's sync. For async use getGasPrice console.log(web3.eth.gasPrice.toString()); console.log(web3.eth.getBalance("0x407d73d8a49eeb85d32cf465507dd71d507100c1", 45).toString()); console.log(web3.eth.getTransactionReceipt("0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b"));
The output will be of this form:
20000000000 30000000000 { "transactionHash": "0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b ", "transactionIndex": 0, "blockHash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46", "blockNumber": 3, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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