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feat(light-client-ext-helpers): tx-helper
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| --- | ||
| "@substrate/light-client-extension-helpers": minor | ||
| "@substrate/wallet-template": patch | ||
| --- | ||
|
|
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| - Add `tx-helper` package to light client extension helpers | ||
| - Replace usage of internal tx-helper with added package in wallet-template |
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76 changes: 76 additions & 0 deletions
76
packages/light-client-extension-helpers/src/tx-helper/index.ts
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| Original file line number | Diff line number | Diff line change |
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| import { getObservableClient } from "@polkadot-api/observable-client" | ||
| import { createClient } from "@polkadot-api/substrate-client" | ||
| import { CreateTxOptions, JsonRpcProvider } from "./types" | ||
| import { filter, firstValueFrom, map, mergeMap, take } from "rxjs" | ||
| import * as polkadotAPI from "./polkadot-api" | ||
|
|
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| type UserSignedExtensions = { | ||
| CheckMortality?: | ||
| | { | ||
| mortal: false | ||
| } | ||
| | { | ||
| mortal: true | ||
| period: number | ||
| } | ||
| ChargeTransactionPayment: bigint | ||
| ChargeAssetTxPayment: { | ||
| tip: bigint | ||
| asset?: Uint8Array | ||
| } | ||
| } | ||
|
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| type UserSignedExtensionName = keyof UserSignedExtensions | ||
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| const isUserSignedExtensionName = (s: string): s is UserSignedExtensionName => { | ||
| return ( | ||
| s === "CheckMortality" || | ||
| s === "ChargeTransactionPayment" || | ||
| s === "ChargeAssetTxPayment" | ||
| ) | ||
| } | ||
|
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| export const createTx = | ||
| (jsonRpcProvider: JsonRpcProvider) => | ||
| async (options: CreateTxOptions): Promise<Uint8Array> => { | ||
| const client = getObservableClient(createClient(jsonRpcProvider)) | ||
| const chainHead$ = client.chainHead$() | ||
|
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| const { best: atBlock } = await firstValueFrom( | ||
| chainHead$.best$.pipe( | ||
| mergeMap((blockInfo) => | ||
| chainHead$.getRuntimeContext$(blockInfo.hash).pipe( | ||
| take(1), | ||
| map(({ metadata }) => | ||
| metadata.extrinsic.signedExtensions | ||
| .map(({ identifier }) => identifier) | ||
| .filter(isUserSignedExtensionName), | ||
| ), | ||
| map((userSignedExtensionNames) => ({ | ||
| best: blockInfo, | ||
| userSignedExtensionNames, | ||
| })), | ||
| ), | ||
| ), | ||
| filter(Boolean), | ||
| ), | ||
| ) | ||
|
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| const tx = await firstValueFrom( | ||
| polkadotAPI | ||
| .createTx( | ||
| chainHead$, | ||
| options.signer, | ||
| options.callData, | ||
| atBlock, | ||
| options.hinted, | ||
| ) | ||
| .pipe(filter(Boolean)), | ||
| ) | ||
|
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| client.destroy() | ||
|
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| return tx | ||
| } | ||
|
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| export type * from "./types" |
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packages/light-client-extension-helpers/src/tx-helper/polkadot-api/index.ts
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| @@ -0,0 +1 @@ | ||
| export { createTx } from "./tx-helper/create-tx" |
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17 changes: 17 additions & 0 deletions
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packages/light-client-extension-helpers/src/tx-helper/types.ts
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,17 @@ | ||
| import type { JsonRpcProvider } from "@polkadot-api/json-rpc-provider" | ||
| import type { PolkadotSigner } from "@polkadot-api/polkadot-signer" | ||
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| export type HintedSignedExtensions = Partial<{ | ||
| readonly tip: bigint | ||
| readonly mortality: { mortal: false } | { mortal: true; period: number } | ||
| readonly asset: Uint8Array | ||
| readonly nonce: number | ||
| }> | ||
|
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| export type CreateTxOptions = { | ||
| readonly signer: PolkadotSigner | ||
| readonly callData: Uint8Array | ||
| readonly hinted?: HintedSignedExtensions | ||
| } | ||
|
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| export type { JsonRpcProvider, PolkadotSigner } |
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