feat(e2e): add coinbase express server and facilitator with MoneyParser#12
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feat(e2e): add coinbase express server and facilitator with MoneyParser#12
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Implement e2e tests for coinbase v2 SDK using MoneyParser for DHLU token. - Add coinbase components in e2e/coinbase - Support MoneyParser for EVM DHLU mapping - Integrate with existing e2e discovery and setup framework - Restrict coinbase implementations to EVM only as requested
boboliu-1010
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Apr 27, 2026
Followup to the 2026-04-27 Nile evaluation. Two GasFree quirks were worth correcting in user-facing code rather than just documenting. balance: query the chain directly, not GasFree API - New src/onchain.ts: getTrc20Balance() hits the Tron full-node /wallet/triggerconstantcontract endpoint with hand-built calldata. No tronweb abi-encoder, no signature, no broadcast. - balance command now surfaces both chainBalance + apiBalance per asset, plus an apiBalanceStale flag and a stderr warning when the two disagree. Verified live: chain=23.2948 USDT vs api=0 → stale warning fired correctly. - New balance test covers the stale path (chain ≠ api → warning + flag). transfer --dry-run: surface GasFree fee economics - Computes feeAsPercentageOfAmount = (transferFee + activateFee) / amount. Also emits a stderr WARNING when fees ≥ 10% of payment. At our default 0.001 USDT test amount the warning is 10000.0% — loud on purpose; users should know GasFree has flat per-tx fees and is uneconomical for sub-dollar payments. Documentation: - docs/solutions.md #11: GasFree assets[].balance can lag the chain; always read from the contract. - docs/solutions.md #12: GasFree fee structure is flat-per-tx; small payments have huge fee/amount ratios. Recommends switching to ERC-3009 exact for micropayments. - typescript/packages/cli/README.md: new "GasFree economics" section before the configuration reference, with the break-even rule of thumb and a pointer to the new solutions entries. Tests: 94 (was 93). All green. balance.test.ts gained one stale-flag test; transfer/dry-run continues to assert the wrapped envelope shape. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
e2e/coinbase/.MoneyParsermechanism for EVM DHLU token mapping ($0.001 -> 1000 DHLU).pnpm --filter @bankofai/x402-e2e test --servers=coinbase-express --facilitators=coinbase-typescript --clients=axios --families=evm.Changes
e2e/coinbase/servers/expressusing@x402/expressand@x402/core.e2e/coinbase/facilitators/typescriptusing@x402/coreand@x402/evm.e2e/src/discovery.tsto include coinbase directories in test discovery.e2e/setup.shande2e/package.jsonwith--coinbasesupport.e2e/pnpm-workspace.yamlto include the new packages.