What causes "Failed to deploy predicate chunk" in FuelLabs/fuels-ts?

Ensure the deployer account has sufficient base-asset funds to cover the blob transaction fee.

FuelLabs/fuels-ts · error · FuelError

TRANSACTION_FAILED

TRANSACTION_FAILED

Error message

Failed to deploy predicate chunk

What it means

Thrown by deployScriptOrPredicate()'s waitForResult when the blob transaction (uploading a predicate/script chunk) either rejects during sendTransaction/waitForResult or completes with a status other than TransactionStatus.success. The original error is swallowed and re-thrown as a generic TRANSACTION_FAILED, so the underlying cause is not exposed.

Source

Thrown at packages/account/src/utils/deployScriptOrPredicate.ts:88

    return {
      waitForResult: () => Promise.resolve(loaderInstance),
      blobId,
    };
  }

  const fundedBlobRequest = await fundBlobTx(deployer, blobTxRequest);

  // Transaction id is unset until we have funded the create tx, which is dependent on the blob tx
  const waitForResult = async () => {
    try {
      const blobTx = await deployer.sendTransaction(fundedBlobRequest);
      const result = await blobTx.waitForResult();

      if (result.status !== TransactionStatus.success) {
        throw new Error();
      }
    } catch (err: unknown) {
      throw new FuelError(ErrorCode.TRANSACTION_FAILED, 'Failed to deploy predicate chunk');
    }

    return loaderInstance;
  };

  return {
    waitForResult,
    blobId,
  };
}

View on GitHub (pinned to b3f37c91ac)

Solutions

Ensure the deployer account has sufficient base-asset funds to cover the blob transaction fee.
Confirm the provider/node is reachable and synced before retrying.
Check the node's logs for the actual rejection reason (the SDK discards the original error message).
If the blob already exists, the code short-circuits before submission — verify getBlobs behavior if you suspect a stale state.
Retry with an updated gas price if the failure was due to underpricing.

Defensive patterns

Strategy: retry

Validate before calling

const balance = await deployer.getBalance(baseAssetId);
if (balance.eq(0)) throw new Error('Deployer has no base asset for blob tx fee');

Try / catch

let lastErr: unknown;
for (let attempt = 0; attempt < 3; attempt++) {
  try { return await deployment.waitForResult(); }
  catch (err) {
    lastErr = err;
    if (err instanceof FuelError && err.code === ErrorCode.TRANSACTION_FAILED) continue;
    throw err;
  }
}
throw lastErr;

Prevention

Fund the deployer account adequately before deployment.
Inspect node logs since the SDK discards the underlying blob-tx error.
Use a stable gas-price strategy to avoid underpriced txs.

When it happens

Trigger: Calling waitForResult() on the object returned by deployScriptOrPredicate (used when deploying large predicates/scripts as blobs). Triggers include: network/provider errors, insufficient funds to pay the blob tx fee, the node rejecting the blob, or the transaction being committed with a non-success terminal status.

Common situations: Deployer account underfunded for blob gas; node connection drops mid-submission; deploying a malformed/oversized blob; chain_id or consensus parameter mismatch; the blob was already uploaded and a duplicate submission conflicts; gas price spike causing the funded tx to be underpriced.

Related errors

AI-assisted analysis of FuelLabs/fuels-ts@b3f37c91ac (2026-08-12). Data as JSON: /api/errors/38f93ad19bba3b28. Report an issue: GitHub.