James Lefrère
73d7a57d38
* Use `eq` for example * Use the base `eq` function rather than `===`, so that comparisons are made in a consistent manner in docs * Add `eq` example * Add an example of using the `eq` method to the base docs * Adjust docs/examples * Fix a number of typos in the static docs and examples * Adjust various comments in docs examples such that they are written in a consistent case * Fix metadata docs spacing * Adjust the metadata documentation generation such that unnecessary spaces are trimmed
33 lines
1.3 KiB
JavaScript
Executable File
33 lines
1.3 KiB
JavaScript
Executable File
/* eslint-disable @typescript-eslint/require-await */
|
|
/* eslint-disable @typescript-eslint/unbound-method */
|
|
/* eslint-disable @typescript-eslint/no-var-requires */
|
|
// Import the API
|
|
const { ApiPromise } = require('@polkadot/api');
|
|
|
|
// Our address for Alice on the dev chain
|
|
const ALICE = '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY';
|
|
const BOB = '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty';
|
|
|
|
async function main () {
|
|
// Create our API with a default connection to the local node
|
|
const api = await ApiPromise.create();
|
|
|
|
// Retrieve the last block header, extracting the hash and parentHash
|
|
const { hash, parentHash } = await api.rpc.chain.getHeader();
|
|
|
|
console.log(`last header hash ${hash.toHex()}`);
|
|
|
|
// Retrieve the balance at the preceding block for Alice. For at queries
|
|
// the format is always `.at(<blockhash>, ...params)`
|
|
const balance = await api.query.balances.freeBalance.at(parentHash, ALICE);
|
|
|
|
console.log(`Alice's balance at ${parentHash.toHex()} was ${balance}`);
|
|
|
|
// Now perform a multi query, returning multiple balances at once
|
|
const balances = await api.query.balances.freeBalance.multi([ALICE, BOB]);
|
|
|
|
console.log(`Current balances for Alice and Bob are ${balances[0]} and ${balances[1]}`);
|
|
}
|
|
|
|
main().catch(console.error).finally(() => process.exit());
|