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Added polkadot/api and rewrite sendTransaction #882

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Added polkadot/api and rewrite sendTransaction #882

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1 change: 1 addition & 0 deletions advanced/dapps/react-dapp-v2/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
"@multiversx/sdk-wallet": "4.2.0",
"@noble/curves": "^1.8.1",
"@noble/secp256k1": "^2.2.3",
"@polkadot/api": "^15.10.2",
"@polkadot/util-crypto": "^10.1.2",
"@solana/web3.js": "^1.36.0",
"@walletconnect/core": "^2.19.1",
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43 changes: 33 additions & 10 deletions advanced/dapps/react-dapp-v2/src/contexts/JsonRpcContext.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import * as encoding from "@walletconnect/encoding";
import { Transaction as EthTransaction } from "@ethereumjs/tx";
import { recoverTransaction } from "@celo/wallet-base";
import * as bitcoin from "bitcoinjs-lib";
import { ApiPromise, WsProvider } from "@polkadot/api";

import {
formatDirectSignDoc,
Expand Down Expand Up @@ -84,6 +85,7 @@ import {
} from "../helpers/bip122";
import { getAddressFromAccount } from "@walletconnect/utils";
import { BIP122_DUST_LIMIT } from "../chains/bip122";
import { PolkadotChainData } from "../chains/polkadot";

/**
* Types
Expand Down Expand Up @@ -966,18 +968,28 @@ export function JsonRpcContextProvider({
chainId: string,
address: string
): Promise<IFormattedRpcResponse> => {
// Initialize API

const [namespace, reference] = chainId.split(":");
const targetChainData = chainData[namespace][reference];
const wsProvider = new WsProvider(targetChainData.rpc);
const api = await ApiPromise.create({ provider: wsProvider });

const call = api.tx.balances.transfer(address, 1000000000000); // 1 DOT

const runtime = await api.rpc.state.getRuntimeVersion();
const blockHash = await api.rpc.chain.getBlockHash();
const blockNumber = await api.rpc.chain.getHeader();

const transactionPayload = {
specVersion: "0x00002468",
transactionVersion: "0x0000000e",
specVersion: runtime.specVersion.toHex(),
transactionVersion: runtime.transactionVersion.toHex(),
address: `${address}`,
blockHash:
"0x554d682a74099d05e8b7852d19c93b527b5fae1e9e1969f6e1b82a2f09a14cc9",
blockNumber: "0x00cb539c",
blockHash: blockHash.toHex(),
blockNumber: blockNumber.number.toHex(),
era: "0xc501",
genesisHash:
"0xe143f23803ac50e8f6f8e62695d1ce9e4e1d68aa36c1cd2cfd15340213f3423e",
method:
"0x0001784920616d207369676e696e672074686973207472616e73616374696f6e21",
genesisHash: api.genesisHash.toHex(),
method: call.method.toHex(),
nonce: "0x00000000",
signedExtensions: [
"CheckNonZeroSender",
Expand All @@ -990,7 +1002,7 @@ export function JsonRpcContextProvider({
"ChargeTransactionPayment",
],
tip: "0x00000000000000000000000000000000",
version: 4,
version: api.extrinsicVersion
};

const result = await client!.request<{
Expand All @@ -1008,6 +1020,17 @@ export function JsonRpcContextProvider({
},
});

// result = { signature: '0x...' }
const extrinsic = api.createType('Extrinsic', call);
extrinsic.addSignature(address, `0x${result.signature.replaceAll('0x', '')}`, {
...transactionPayload,
specVersion: api.runtimeVersion.specVersion,
transactionVersion: api.runtimeVersion.transactionVersion,
});

const txHash = api.registry.hash(extrinsic.toU8a()).toHex();
console.log('Transaction hash:', txHash);

return {
method: DEFAULT_POLKADOT_METHODS.POLKADOT_SIGN_TRANSACTION,
address,
Expand Down