[Whitelisted Caller] Refund 44,246.284868 cNGN of protocol fees to 0x4301a30ab2A9C040a8cBEc7fBBde9A6Af0C5F9ac

Execute the previously whitelisted IntentsCoprocessor.sweepDust call via the Whitelisted Caller track, refunding 44,246.284868 cNGN to 0x4301a30ab2A9C040a8cBEc7fBBde9A6Af0C5F9ac from the Base IntentGateway.

Dispatch Call Details

Outer call: Whitelist.dispatchWhitelistedCall(callHash, callEncodedLen, callWeightWitness) (pallet index 83, call index 2)
callHash: 0xaaefa0b344f591265d462a8c456729d3bf29f3b993d49f535621051516de99b5
callEncodedLen: 92
callWeightWitness: { refTime: 800000000, proofSize: 6000 }
Encoded: 0x5302aaefa0b344f591265d462a8c456729d3bf29f3b993d49f535621051516de99b55c0000000220bcbec15d
Hash: 0x55fc0f0210cd0d1ccfb994021b387ed1571b15689f25ba9abc9b541700562f7d
Length: 44

What This Does

Refunds the protocol fee the Base IntentGateway charged 0x4301a30ab2A9C040a8cBEc7fBBde9A6Af0C5F9ac on two orders that did not execute as intended.

The gateway takes protocolFeeBps off the input amount at order placement, before any fill happens. Base is configured at 5 bps (0.05%). Because the fee comes off notional at placement rather than off what actually gets swapped, both orders paid in full on amounts that were only partly filled or not filled at all.

Order	Input (cNGN)	Fee taken (cNGN)	Outcome
`0x0156216e…`	68,957,000	34,478.5	Partially filled, 40,523,659.135475 refunded
`0xb405d803…`	19,535,569.737450	9,767.784868	Never filled, 19,525,801.952582 refunded
Total		44,246.284868

Both fee figures come from the gateway's own DustCollected(address,uint256) logs, topic 0x51eb5aa877b3d80e186f9a323c6dce052491963271d09ee40615d0bb182359d5.

Decoded Call

IntentsCoprocessor.sweepDust(stateMachine, sweepDust) (pallet index 94, call index 4):

Argument	Value
`stateMachine`	`StateMachine::Evm(8453)` (`EVM-8453`, Base mainnet)
`sweepDust.beneficiary`	`0x4301a30ab2A9C040a8cBEc7fBBde9A6Af0C5F9ac`
`sweepDust.outputs[0].token`	`0x46C85152bFe9f96829aA94755D9f915F9B10EF5F` (cNGN, 6 decimals)
`sweepDust.outputs[0].amount`	`44246284868`

What Lands on Base

The pallet builds an ISMP post request to the registered gateway 0xAe041F7B0CB581876832830baeB6a2Aa2a3C9716, with timeout: 0 and fee: 0, carrying a 161-byte body: a one-byte RequestKind::SweepDust discriminator followed by abi.encode(SweepDust).

0x03
  0000000000000000000000004301a30ab2a9c040a8cbec7fbbde9a6af0c5f9ac   beneficiary
  0000000000000000000000000000000000000000000000000000000000000040   offset to outputs
  0000000000000000000000000000000000000000000000000000000000000001   outputs.length
  00000000000000000000000046c85152bfe9f96829aa94755d9f915f9b10ef5f   token
  0000000000000000000000000000000000000000000000000000000a4d48ba44   amount

ExtrinsicIntents.onAccept requires keccak256(request.source) == keccak256(host.hyperbridge()) for this request kind. host.hyperbridge() on Base returns POLKADOT-3367, which is what Nexus dispatches as, so the check passes. The gateway then runs safeTransfer(cNGN, beneficiary, 44246284868) and emits DustSwept(token, amount, beneficiary).