micro--go-micro
Asim Aslam
b60952cbfe
The x402 wrapper could advertise a 402 and verify a payment, but never
settled it (the "exact" scheme needs verify + settle to actually move
funds), and its HTTPFacilitator sent no auth, so it could not use the
Coinbase CDP facilitator — the only one that settles Base mainnet. It
also passed the raw base64 X-PAYMENT string where facilitators expect the
decoded payload object.
- Add an optional Settler interface; HTTPFacilitator now implements
Verify and Settle (POST /verify then /settle), and Require settles a
verified payment and emits the settlement reference.
- HTTPFacilitator.Authorize hook + x402.CDP(keyID, secret) constructor:
mint a short-lived Ed25519 Bearer JWT (stdlib crypto only, no chain
code, no new dependency) so verify/settle authenticate to CDP.
- Decode the X-PAYMENT payload to the object facilitators expect, with
passthrough for non-JSON payloads.
- Requirements gains extra (EIP-712 domain) and mimeType; the asset and
its {name,version} are auto-filled for known networks so clients can
sign. NormalizeNetwork maps base/base-sepolia to CAIP-2 ids.
- Accept the v2 PAYMENT-SIGNATURE request header and emit both
X-PAYMENT-RESPONSE and PAYMENT-RESPONSE.
Backward compatible: the default network stays "base", the Facilitator
interface is unchanged (Settler is additive), and gateway/mcp builds and
tests unchanged. Adds tests for settle, CDP JWT, header aliases, extra,
and payload decoding.
39 行
1.2 KiB
Go
39 行
1.2 KiB
Go
package x402
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import "strings"
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// assetInfo describes a known stablecoin: its contract address and EIP-712
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// domain (name, version) used to build a transfer-authorization signature.
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type assetInfo struct {
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Address string
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Name string
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Version string
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}
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// knownAssets maps a CAIP-2 network to its default stablecoin (USDC). Used to
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// fill in the asset and its EIP-712 domain when the operator does not specify
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// them, so a client can sign without hand-configured token metadata.
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var knownAssets = map[string]assetInfo{
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"eip155:8453": {"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "USD Coin", "2"}, // Base mainnet
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"eip155:84532": {"0x036CbD53842c5426634e7929541eC2318f3dCF7e", "USDC", "2"}, // Base Sepolia
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}
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// NormalizeNetwork maps common short chain names to their CAIP-2 identifiers,
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// which hosted facilitators (Coinbase CDP) use, and passes anything else
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// through unchanged. Empty defaults to Base mainnet.
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func NormalizeNetwork(n string) string {
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switch strings.ToLower(strings.TrimSpace(n)) {
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case "", "base", "eip155:8453":
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return "eip155:8453"
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case "base-sepolia", "eip155:84532":
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return "eip155:84532"
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default:
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return n
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}
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}
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func defaultAsset(network string) (assetInfo, bool) {
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a, ok := knownAssets[network]
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return a, ok
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}
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