Accepts the proposal at the given revision number. If the revision number in the request is behind the latest from the server, an error message will be returned. This call updates the Proposal.state from BUYER_ACCEPTANCE_REQUESTED to FINALIZED; it has no side effect if the Proposal.state is already FINALIZED and throws exception if the Proposal.state is not either BUYER_ACCEPTANCE_REQUESTED or FINALIZED. Accepting a proposal means the buyer understands and accepts the Proposal.terms_and_conditions proposed by the seller.
HTTP request
POST https://authorizedbuyersmarketplace.googleapis.com/v1/{name=buyers/*/proposals/*}:accept