Robinhood Chain Swap Failed
A failed swap on Robinhood Chain (chain 4663) that spent gas but returned no tokens is a revert. The transaction ran, hit a require() in the router or token contract, and rolled back state. Every revert has a specific cause on-chain, and reading it from Blockscout is faster than guessing at slippage or gas.
This flow shows how to fetch the revert reason, map it to the four common causes (slippage, liquidity, missing approval, token tax) and decide whether a retry is safe or whether the token is misbehaving.
In this article, see also: read the revert reason on Blockscoutdiagnose a slippage errorhandle a missing approvalcheck for honeypot patterns.
Likely causes
1. Slippage exceeded — pool moved between simulation and mine. 2. Insufficient output — the swap would receive less than the minimum you specified. 3. Missing or insufficient allowance — the router cannot pull the input token. 4. Token-side revert — the token's transfer logic (tax, blacklist) blocked the trade. 5. Deadline expired — the transaction sat in the mempool past its deadline.
Safe checks
Open the failed transaction on robinhoodchain.blockscout.com and read the decoded revert reason. Compare that to the pool's current reserves and to your input token's allowance for the router. Confirm the token's transfer function on-chain does not carry unexpected tax or blacklist logic — a verified contract only means the source matches bytecode, not that the source is honest.
Resolution steps
For a slippage revert, either lower your trade size or wait for the pool to stabilise; do not simply raise slippage on a thin pool. For a missing allowance, submit the approval first, wait for it to confirm, and only then retry the swap. For a token-side revert, stop — the contract is telling you it will not let you trade, and repeat attempts will not change that.
Escalation limits
Two reverts on the same trade without a change in inputs is a stop signal, not a reason for a third attempt. Each failed swap still burns gas. If the revert reason is honeypot-shaped (buys succeed, sells fail), the token is not tradeable and no retry policy fixes it.
Prevention
Simulate large swaps before signing and use realistic slippage sized to the pool, not to the loss you would tolerate. Confirm allowances exist for the specific router the dapp uses before the trade, not during.
Frequently asked questions
Do I get my tokens back after a revert? State is rolled back so your input tokens stay in your wallet. The gas the failing transaction consumed is not refunded — reverts still cost the executed compute. Should I just raise slippage and retry? Not without checking pool depth first. On a thin pool, a high slippage cap is an invitation for MEV to fill you at a bad price. Raise slippage only when depth genuinely justifies it. Is a verified contract on Blockscout safe to trade? Verification only proves the source matches the deployed bytecode. It does not prove the code is honest — you still have to read the tax and blacklist logic before assuming buys and sells behave symmetrically.
Related
Sources checked
First-party pages used to write or verify the entries above. Vendor pages change frequently — treat each source as the authoritative reference for its own product, not this article.
- Robinhoodchain Blockscout — transaction detail— Canonical source of the decoded revert reason.
- Robinhood Chain docs — JSON-RPC— Documented eth_call / eth_getTransactionReceipt shape.
- Robinhood Chain docs — overview— Chain-4663 network parameters.
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