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polkadot-api
Advanced tools
... and a lot lot more.
smoldot.ts
import { startFromWorker } from "polkadot-api/smoldot/from-worker"
import SmWorker from "polkadot-api/smoldot/worker?worker"
// Starting smoldot on a Worker (strongly recommended)
export const smoldot = startFromWorker(new SmWorker())
// Alternatively, we could have smoldot running on the main-thread, e.g:
// import { start } from "polkadot-api/smoldot"
// export const smoldot = start()
main.ts
import { createClient } from "polkadot-api"
import { getSmProvider } from "polkadot-api/sm-provider"
import { polkadotTypes } from "@polkadot-api/descriptors"
import { smoldot } from "./smoldot"
// dynamically importing the chainSpec improves the performance of your dApp
const smoldotRelayChain = import("polkadot-api/chains/polkadot").then(
({ chainSpec }) => smoldot.addChain({ chainSpec }),
)
// getting a `JsonRpcProvider` from a `smoldot` chain.
const jsonRpcProvider = getSmProvider(smoldotRelayChain)
// we could also create a `JsonRpcProvider` from a WS connection, eg:
// const jsonRpcProvider = WsProvider("wss://some-rpc-endpoint.io")
const polkadotClient = createClient(jsonRpcProvider)
// logging blocks as they get finalized
polkadotClient.finalizedBlock$.subscribe((block) => {
console.log(`#${block.number} - ${block.hash} - parentHash: ${block.parent}`)
})
// pulling the latest finalized block
const block = await polkadotClient.getFinalizedBlock()
// obtaining a delightfully typed interface from the descriptors
// previously generated from the metadata
const polkadotApi = polkadotClient.getTypedApi(polkadotTypes)
// presenting the transferrable amount of a given account
const {
data: { free, frozen },
} = await polkadotApi.query.System.Account.getValue(
"15oF4uVJwmo4TdGW7VfQxNLavjCXviqxT9S1MgbjMNHr6Sp5",
)
console.log(`Transferrable amount: ${free - frozen}`)
FAQs
## Features
The npm package polkadot-api receives a total of 0 weekly downloads. As such, polkadot-api popularity was classified as not popular.
We found that polkadot-api demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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