How to use the @polkadot/metadata function in @polkadot/metadata
To help you get started, we’ve selected a few @polkadot/metadata examples, based on popular ways it is used in public projects.
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polkadot-js / api / packages / rpc-core / src / formatting.spec.ts View on Github 
return done();
}
api.state
.subscribeStorage([[decorated.query.staking.validators, '0x00']])
.subscribe(([value]: Codec[]): void => {
expect(value).toBeDefined();
// console.error('linked falklback', value);
done();
});
});
});
}
formattingTests('v3', new Metadata(registry, rpcMetadataV3), [
'0x4af2c53fce3ec33c6ccccf22e926f1a7',
'0x3e62f7ed6e788e1337bce2a97b68a12a',
'0x777519cd81f845abdb40d253923d6098'
]);
formattingTests('v4', new Metadata(registry, rpcMetadataV4), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v5', new Metadata(registry, rpcMetadataV5), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);expect(value).toBeDefined();
// console.error('linked falklback', value);
done();
});
});
});
}
formattingTests('v3', new Metadata(registry, rpcMetadataV3), [
'0x4af2c53fce3ec33c6ccccf22e926f1a7',
'0x3e62f7ed6e788e1337bce2a97b68a12a',
'0x777519cd81f845abdb40d253923d6098'
]);
formattingTests('v4', new Metadata(registry, rpcMetadataV4), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v5', new Metadata(registry, rpcMetadataV5), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v6', new Metadata(registry, rpcMetadataV6), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);private init (): void {
const emitEvents: ProviderInterfaceEmitted[] = ['connected', 'disconnected'];
let emitIndex = 0;
let newHead = this.makeBlockHeader(new BN(-1));
let counter = -1;
const metadata = new Metadata(this.registry, rpcMetadata);
// Do something every 1 seconds
setInterval((): void => {
if (!this.isUpdating) {
return;
}
// create a new header (next block)
newHead = this.makeBlockHeader(newHead.number.toBn());
// increment the balances and nonce for each account
keyring.getPairs().forEach(({ publicKey }, index): void => {
this.setStateBn(metadata.query.balances.freeBalance(publicKey), newHead.number.toBn().muln(3).iaddn(index));
this.setStateBn(metadata.query.system.accountNonce(publicKey), newHead.number.toBn().addn(index));
});});
}
formattingTests('v3', new Metadata(registry, rpcMetadataV3), [
'0x4af2c53fce3ec33c6ccccf22e926f1a7',
'0x3e62f7ed6e788e1337bce2a97b68a12a',
'0x777519cd81f845abdb40d253923d6098'
]);
formattingTests('v4', new Metadata(registry, rpcMetadataV4), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v5', new Metadata(registry, rpcMetadataV5), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v6', new Metadata(registry, rpcMetadataV6), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v7', new Metadata(registry, rpcMetadataV7), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v5', new Metadata(registry, rpcMetadataV5), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v6', new Metadata(registry, rpcMetadataV6), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v7', new Metadata(registry, rpcMetadataV7), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v8', new Metadata(registry, rpcMetadataV8), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);'0x777519cd81f845abdb40d253923d6098'
]);
formattingTests('v4', new Metadata(registry, rpcMetadataV4), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v5', new Metadata(registry, rpcMetadataV5), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v6', new Metadata(registry, rpcMetadataV6), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v7', new Metadata(registry, rpcMetadataV7), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v8', new Metadata(registry, rpcMetadataV8), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);const options = { flags: 'r', encoding: 'utf8' };
const data = fs.readFileSync('docs/substrate/storage-known.md', options);
writeFile('docs/substrate/storage.md', addStorage(metadata), data);
}
function writeToExtrinsicsMd (metadata: MetadataV8): void {
writeFile('docs/substrate/extrinsics.md', addExtrinsics(metadata));
}
function writeToEventsMd (metadata: MetadataV8): void {
writeFile('docs/substrate/events.md', addEvents(metadata));
}
const registry = new TypeRegistry();
const metadata = new Metadata(registry, rpcdata).metadata.asLatest;
writeToRpcMd();
writeToConstantsMd(metadata);
writeToStorageMd(metadata);
writeToExtrinsicsMd(metadata);
writeToEventsMd(metadata);'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v6', new Metadata(registry, rpcMetadataV6), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v7', new Metadata(registry, rpcMetadataV7), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);
formattingTests('v8', new Metadata(registry, rpcMetadataV8), [
'0xec8f96437274a883afcac82d01a9defeb68209cd4f2c084632813692aa5e65ad',
'0x1dbb0224910f42a14e7f1406b24c6fe8157296691b02a78756e01946038fffab',
'0xc7879f4faa637a90d782070a3cb6be99a9fb0316e19a0454ce93c4f0a34712f1'
]);@polkadot/metadata
Helpers to extract information from runtime metadata
