I'm trying to call a smart contract using the Polkadot JS API (like here). The contract function is really simple, it takes 2 strings: a key and a value as input parameters, then adds the key, value to a hashmap in the contract storage. I can call it normally in the PolkadotJs UI, but when try using the PolkadotJs Javascript API I got this error message:

2022-02-28 00:12:01             DRR: 1010: Invalid Transaction: Transaction would exhaust the block limits
Error: 1010: Invalid Transaction: Transaction would exhaust the block limits
    at RpcCoder._checkError (/home/minhnd/node_modules/@polkadot/rpc-provider/coder/index.cjs:84:13)
    at RpcCoder.decodeResponse (/home/minhnd/node_modules/@polkadot/rpc-provider/coder/index.cjs:47:10)
    at WsProvider.value (/home/minhnd/node_modules/@polkadot/rpc-provider/ws/index.cjs:267:90)
    at W3CWebSocket.value [as onmessage] (/home/minhnd/node_modules/@polkadot/rpc-provider/ws/index.cjs:247:153)
    at W3CWebSocket._dispatchEvent [as dispatchEvent] (/home/minhnd/node_modules/yaeti/lib/EventTarget.js:107:17)
    at W3CWebSocket.onMessage (/home/minhnd/node_modules/websocket/lib/W3CWebSocket.js:234:14)
    at WebSocketConnection.<anonymous> (/home/minhnd/node_modules/websocket/lib/W3CWebSocket.js:205:19)
    at WebSocketConnection.emit (node:events:520:28)
    at WebSocketConnection.processFrame (/home/minhnd/node_modules/websocket/lib/WebSocketConnection.js:554:26)
    at /home/minhnd/node_modules/websocket/lib/WebSocketConnection.js:323:40
2022-02-28 00:12:01        RPC-CORE: submitAndWatchExtrinsic(extrinsic: Extrinsic): ExtrinsicStatus:: 1010: Invalid Transaction: Transaction would exhaust the block limits

This is my code:

// Required imports
const { ApiPromise, WsProvider } = require("@polkadot/api");
const { ContractPromise } = require("@polkadot/api-contract");
const { keyring } = require("@polkadot/ui-keyring");
keyring.loadAll({ ss58Format: 42, type: "sr25519" });

const abi = require("./freshdi_metadata.json");

async function main() {
    const provider = new WsProvider("ws://");
    const api = await ApiPromise.create({ provider });

    const contractAddress = "5CbqJvv4VXFNsoK6nj95jD3ajopgJmrB5XP2vXHCvMekxqC6";
    const contract = new ContractPromise(api, abi, contractAddress);

    const alicePair = keyring.createFromUri("//Alice");

    const value = 0;
    const gasLimit = 5 * 1000000000000;

    await contract.tx
        .insertAction({ value, gasLimit }, "key_str","value_str")
        .signAndSend(alicePair, (result) => {
            if (result.status.isInBlock) {
                console.log("in a block");
            } else if (result.status.isFinalized) {

    .finally(() => process.exit());
  • 1
    Can you provide the configuration of your runtime, about the parameter following: pub RuntimeBlockLength: BlockLength = BlockLength::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO); Feb 28, 2022 at 5:00
  • @ironman_ch_parami, it's the default configuration of substrate
    – Minh Mốc
    Feb 28, 2022 at 6:49
  • @ironman_ch_parami I tried with the flipper contract but the error is still there
    – Minh Mốc
    Mar 1, 2022 at 2:35

2 Answers 2


I found the solution, I set the gas limit too high. Thank you all for your support!


I solved it by going to contracts-UI. Then pretending to want to call the function with the parameters. Automatically the real values (max and to-be-used) are computed by the UI. You can just copy it into your code.

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