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I want to know how I can get list of transactions and transactions info for specific wallet address in polkadot.js/api, especially for kusama.

const provider = new WsProvider("wss://kusama-rpc.polkadot.io");
const api = await ApiPromise.create({ provider });
const response = await api.rpc.eth.getTransactionByHash(hash);

I am not sure if above code is for transactions, however it is not running and cause error.

UnhandledPromiseRejectionWarning: TypeError: api.rpc.eth.getTransactionByHash is not a function

How can I get transactions from wallet address in polkadot.js/api?

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  • 4
  • It doesn't give answer for my question. I commented in above question, how can I get transactions from block? Or is there any other solution?
    – Heindrick
    Commented Jun 30, 2022 at 15:04
  • I believe both links by @Jaco are answering your question: The node itself doesn't index all transactions, it just stores blocks and states. You should fetch all blocks yourself and index transactions. If you want to fetch transactions from a block you can use API Sidecar to do this: Have a look at wiki.polkadot.network/docs/… for more details
    – Iker
    Commented Jul 1, 2022 at 7:40

1 Answer 1

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To answer your comment around block-by-hash (there are no account -> transaction mappings on the RPCs, as per the linked answers in the comments above) -

You can use the getBlock RPC call. Since you are using the JS API based on your example -

// retrieve the block by hash, API decodes extrinsics
const signedBlock = await api.rpc.chain.getBlock("0x...blockHash here...")

// loop through extrinsics
for (let i = 0; i < signedBlock.block.extrinsics.length; i++) {
  const x = signedBlock.block.extrinsics[i];

  console.log(`
    isSigned=${x.isSigned},
    pallet=${x.method.section},
    method=${x.method.method}
  `)
}
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  • Thanks for your answer. I was able to run your code. However, it doesn't give transaction information. Like transaction amount, type, fee etc. How can I get it?
    – Heindrick
    Commented Jul 1, 2022 at 15:41
  • Those are all part of the arguments - x.args in the naming above. Commented Jul 3, 2022 at 6:40

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