Gateway Nanopayments Primer
Circle Developer Notes / 0.002400 USDCreceipt evidence
0xbd7f2c90...3e280c
paid to creator0.002400USDC
forum routed
Circle Developer Notes
This receipt binds a source payment to the answer that used it. The previous hash links it into the append-only attribution ledger.
receipt hash0xbd7f2c909df20aaaa71d44550c782efbcdff0bbecef63b2dd467b5d28e3e280c
previous hash0xc6174828b0c7b8ac117339e05efbf5197a9ad8c4d1da54c0104184038b0c20c0
query id0xda909d0357c319d5
source idcircle-gateway-nano
creator wallet0x2222...2222
created at2026-06-23T14:52:54.366Z
payment resourceforum-fee-router:0xeff9bc359e8f2a5eabce55af3f1bb24f98eabf59
query payment hashnot reader-paid
payer0x4164F5B52ecc6F847f03071A287b0B59954cbcEe
transaction0x908055f7...b8dce6
FeeRouter split19
FeeRouter createSplit0x3d25ee38...755cd8
FeeRouter pay0x908055f7...b8dce6
answer context
What does Tollgate use to prove paid citations with on-chain receipts on Arc?
Tollgate uses USDC on-chain receipts on Arc to prove paid citations. The system leverages Arc's stablecoin-native settlement with USDC gas and sub-second finality, combined with x402 payment protocols that enable sub-cent value transactions. Receipt hashes are published on-chain, making source payments visible, automatic, and tied to the specific answers that reused the work.
Open answer evidenceExplains x402 payment batching mechanism that enables sub-cent USDC transactions without per-payment gas, foundational to receipt-based citation payments