Skip to content

docs(examples/base-mainnet): note that MERCHANT_WALLET can be a contract address #27

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Revinand merged 2 commits into from
Oct 23, 2026
Merged

docs(examples/base-mainnet): note that MERCHANT_WALLET can be a contract address #27

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
95e8d2c
docs(examples/base-mainnet): MERCHANT_WALLET can be a contract address
SCDOLAB Oct 21, 2026
c130c4d
docs(examples/base-mainnet): address the contract payTo review
cursoragent Oct 22, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
21 changes: 20 additions & 1 deletion examples/base-mainnet/README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ Two things are structurally different from the local and testnet examples:

| | |
| ---------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `MERCHANT_WALLET` | your wallet. Address only: the gateway never takes a merchant key. |
| `MERCHANT_WALLET` | your wallet. Address only: the gateway never takes a merchant key. See [Paying into a contract](#paying-into-a-contract-address). |
| `ALLOW_X402_MAINNET=true` | the explicit opt-in. Never a default. |
| CDP credentials, or a bearer token | `cdp` requires the optional `@coinbase/x402` peer and CDP's URL, already configured. `bearer` needs no extra package; set its facilitator's https `url`. |
| `ADMIN_TOKEN` | required here: it guards the receipt routes, which carry your ledger. |
Expand All @@ -27,6 +27,25 @@ Two things are structurally different from the local and testnet examples:
To run without a facilitator credential, see [base-mainnet-payai](../base-mainnet-payai/),
which sets `allowUnauthenticatedFacilitator`.

## Paying into a contract address

`MERCHANT_WALLET` sets the x402 `payTo` address, which can be a contract such
as a revenue splitter on Base. USDC's EIP-3009 `transferWithAuthorization`
transfers tokens without invoking a recipient callback, so the contract needs
no receive handler.

Before using a contract:

- Confirm it can send USDC onward, for example through its `distribute`
function. Otherwise, the funds stay at that address.
- Verify its deployment on each offer's network. A contract exists only on the
chain where it was deployed, while an EOA's key controls its address on every
EVM chain. Do not reuse the address on another network unless the intended
contract is also deployed there.
[`docs/configuration.md`](../../docs/configuration.md) reuses
`${MERCHANT_WALLET}` for Base and Polygon offers. Setting it to a Base
contract would send Polygon payments to an address nobody controls there.

## Validate before anything else

```bash
Expand Down
Loading