feat(blockchain): crypto ticket settlement on-chain via mintTicket - #98
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Route crypto purchases through the paid `mintTicket` instead of the free `mintFiatTicket`: the buyer's own (gas-sponsored) wallet approves USDC and calls the Diamond, which splits revenue on-chain by `isRefundable` — instant to the organizer for non-refundable events, escrow for refundable — and mints the NFT to the buyer. Fiat purchases keep the free mint. - onchain-fees.ts: shared FeeType codes + organizer-bears fee helper (ticketFee = price * 10000/(10000+bps)) so the buyer pays the face price on both rails, mirroring the contract's integer fee math. - events publish + crypto-checkout consume the helper — single source of truth for the on-chain ticketFee and the deposit amount. - crypto-checkout: deposit = totalFee * quantity (exactly what mintTicket pulls per mint) instead of the raw NGN->USDC conversion. - CircleContractService: `approveErc20` for the USDC allowance leg + a non-persisting `pollUntilTerminal` for the untracked approve tx. - mint worker: read the authoritative on-chain totalFee, approve, then mintTicket signed by the buyer wallet; fiat path unchanged (treasury). Refs #96
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Route crypto purchases through the paid
mintTicketinstead of the freemintFiatTicket: the buyer's own (gas-sponsored) wallet approves USDC and calls the Diamond, which splits revenue on-chain byisRefundable— instant to the organizer for non-refundable events, escrow for refundable — and mints the NFT to the buyer. Fiat purchases keep the free mint.approveErc20for the USDC allowance leg + a non-persistingpollUntilTerminalfor the untracked approve tx.Refs #96