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instanceStateLookup.ts
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instanceStateLookup.ts
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import { parseEndpoint } from '../shared/util.js';
import { BlockHash, ContractAddress, HexString } from '@concordium/web-sdk';
import { ConcordiumGRPCNodeClient } from '@concordium/web-sdk/nodejs';
import { credentials } from '@grpc/grpc-js';
import meow from 'meow';
const cli = meow(
`
Usage
$ yarn run-example <path-to-this-file> [options]
Required:
--key, -k The key from which to get the value from the contract state
--contract, -c The index of the contract to query info about
Options
--help, Displays this message
--block, -b A block to query from, defaults to last final block
--endpoint, -e Specify endpoint of the form "address:port", defaults to localhost:20000
`,
{
importMeta: import.meta,
flags: {
key: {
type: 'string',
alias: 'k',
isRequired: true,
},
contract: {
type: 'number',
alias: 'c',
isRequired: true,
},
block: {
type: 'string',
alias: 'b',
},
endpoint: {
type: 'string',
alias: 'e',
default: 'localhost:20000',
},
},
}
);
const [address, port] = parseEndpoint(cli.flags.endpoint);
const client = new ConcordiumGRPCNodeClient(
address,
Number(port),
credentials.createInsecure()
);
/**
* Get the value at a specific key of a contract state as a hex string.
* In contrast to `GetInstanceState` this is more efficient, but requires the
* user to know the specific key to look for. If a blockhash is not supplied
* it will pick the latest finalized block.
*/
(async () => {
// #region documentation-snippet
const contract = ContractAddress.create(cli.flags.contract);
const blockHash =
cli.flags.block === undefined
? undefined
: BlockHash.fromHexString(cli.flags.block);
const state: HexString = await client.instanceStateLookup(
contract,
cli.flags.key,
blockHash
);
// #endregion documentation-snippet
console.log(state);
})();