Luke Schoen
f399bb6fd6
* Move triple backticks onto new line so it doesn't break the code snippet formatting
* Add newline between dependency imports and variable declarations
* Add link to relevant line of Github repo of eventemitter3 instead of the travis build directory
* Add full stop at end of sentence in line before `@example` in .ts files, since I noticed that was the only difference between code snippet in docs that was being rendered correctly and one that was not (if the docs were generated from it). Not sure if this actually makes any difference though, but it doesn't hurt to try. i.e. change `[[unsubscribe]]` to `[[unsubscribe]].`
* Add missing code syntax for `new Ws(defaults.WS_URL)`
* Add missing `*__example__*:`
* Add missing semi-colons throughout code
* Fix typos and some grammar
* Move import of external libraries i.e. `const BN = require('bn.js');` or `const crypto = require('crypto');` before `@polkadot` ones in code
* Change from `e` to `error` in catch blocks for readable documentation
57 lines
2.0 KiB
JavaScript
Executable File
57 lines
2.0 KiB
JavaScript
Executable File
const BN = require('bn.js');
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const Api = require('@polkadot/api').default;
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const WsProvider = require('@polkadot/api-provider/ws').default;
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const extrinsics = require('@polkadot/extrinsics').default;
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const encodeExtrinsic = require('@polkadot/extrinsics/codec/encode').default;
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const encodeLength = require('@polkadot/extrinsics/codec/encode/length').default;
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const Keyring = require('@polkadot/util-keyring').default;
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const storage = require('@polkadot/storage').default;
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const Encoder = new TextEncoder();
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const keyring = new Keyring();
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const provider = new WsProvider('ws://127.0.0.1:9944');
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const api = new Api(provider);
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async function getAccountIndex (address) {
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return api.state.getStorage([storage.system.public.accountIndexOf, address]);
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}
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async function transfer (keyRingFrom, addressTo, amount) {
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const accountIndex = await getAccountIndex(keyRingFrom.address());
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console.log(`Current accountIndex: ${accountIndex}`);
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// encode the call for signing
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const message = encodeExtrinsic(
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keyRingFrom.publicKey(),
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accountIndex,
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extrinsics.staking.public.transfer,
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[addressTo, amount]
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);
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// get the signature
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const signature = keyRingFrom.sign(message);
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// encode the extrinsic for submission, adding the length (prefix) and the
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// signature (postfix)Rödl
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const encoded = encodeLength(
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// When working with publicKeys, the prefix is 0xff for poc-2+
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new Uint8Array([0xff]),
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message,
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signature
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);
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return api.author.submitExtrinsic(encoded);
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}
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const Alice = keyring.addFromSeed(Encoder.encode('Alice '));
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const addressBob = '5Gw3s7q4QLkSWwknsiPtjujPv3XM4Trxi5d4PgKMMk3gfGTE';
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const amount = new BN(999); // on dev chain, the fee is 1, that makes it a round 1000
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console.log(`Crafting and sending an extrinsic for Alice to send Bob ${amount} DOTs`);
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transfer(Alice, addressBob, amount)
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.then(() => console.log('Sent'))
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.catch((error) => console.log('HINT: Make sure you wait for the storage to update before sending the next extrinsic', error))
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.finally(_ => process.exit(0));
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