Wallet
Get replacement tx params for cancel (stuck EVM tx)
Returns **replacement transaction params** to cancel a stuck EVM transaction (same nonce, to=self, value=0, data=0x, higher gas). Client signs and broadcasts via POST /api/wallet/non-custodial/broadcast. Address must be registered for your organization. EVM chains only.
POST
/api/wallet/non-custodial/cancelSDK setup
Create a client and set credentials (JWT and/or API key) before calling the API. Match the authentication type shown above.
import { Configuration, WalletApi } from 'mudbase-sdk';
const configuration = new Configuration({
basePath: 'https://cloud.mudbase.dev',
accessToken: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c3JfbW9yZ2FuX2RlIiwiZW1haWwiOiJtb3JnYW4uY2hlbkBub3J0aHdpbmQuZGV2IiwiZXhwIjoxODI1MTI5NjAwfQ.doc_preview_sig',
});
const wallet = new WalletApi(configuration);import { Configuration, WalletApi } from 'mudbase-sdk';
const configuration = new Configuration({
basePath: 'https://cloud.mudbase.dev',
accessToken: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c3JfbW9yZ2FuX2RlIiwiZW1haWwiOiJtb3JnYW4uY2hlbkBub3J0aHdpbmQuZGV2IiwiZXhwIjoxODI1MTI5NjAwfQ.doc_preview_sig',
});
const wallet = new WalletApi(configuration);Example request
Call this endpoint using the client from SDK setup. Use View HTTP for a raw cURL example.
const { data: result } = await wallet.getCancelParams(
{
txId: "QgiN5qRVqOkADzC9",
txHash: "matrix compress",
chain: "transmitter override"
}
);const { data: result } = await wallet.getCancelParams(
{
txId: "QgiN5qRVqOkADzC9",
txHash: "matrix compress",
chain: "transmitter override"
}
);Playground
liveTest this endpoint with your own credentials. Your requests will be sent to the live API.
Use the auth endpoints to obtain a JWT.
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Authentication
Requires JWT
Note
Include your JWT in the
Authorization: Bearer YOUR_TOKEN header (user-facing apps, RBAC). View authentication guide →Request Body
json
{
"txId": "fuQL5q2CnCsEqHUo",
"txHash": "interface back up",
"chain": "binance"
}{
"txId": "fuQL5q2CnCsEqHUo",
"txHash": "interface back up",
"chain": "binance"
}Responses
200Cancel tx params (client signs and broadcasts via /broadcast)
json
{
"success": true,
"data": {
"chainId": 1,
"from": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
"nonce": 7,
"to": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
"value": "0",
"data": "0x",
"gasLimit": "21000",
"maxFeePerGas": "36000000000"
}
}{
"success": true,
"data": {
"chainId": 1,
"from": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
"nonce": 7,
"to": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
"value": "0",
"data": "0x",
"gasLimit": "21000",
"maxFeePerGas": "36000000000"
}
}400—
401—
403—
404—
Errors
| Code | Meaning |
|---|---|
400 | — |
401 | — |
403 | — |
404 | — |