nick-doc/02 - Data Models/SellerOffer.md

title, tags, aliases

title	tags	aliases
SellerOffer	data-model mongoose	Seller Offer Bid ISellerOffer

SellerOffer

Last updated: 2026-05-29 — aligned with code (see Doc vs Code Audit Report)

A seller's bid against a PurchaseRequest. Stores the proposed price, the delivery time commitment, optional notes/attachments, and a small status machine (pending / accepted / rejected / withdrawn). The parent PurchaseRequest keeps the array of offer ids in offers[] and the chosen one in selectedOfferId.

[!note] Source backend/src/models/SellerOffer.ts:24 — schema definition backend/src/models/SellerOffer.ts:100 — model export

Schema

Field	Type	Required	Default	Validation	Index	Description
sellerId	ObjectId → User	yes	—	—	yes	Seller submitting the bid.
purchaseRequestId	ObjectId → PurchaseRequest	yes	—	—	yes	Parent request.
title	String	yes	—	trim, maxlength 200	—	Offer headline.
description	String	yes	—	trim, maxlength 1000	—	Pitch and details.
price.amount	Number	yes	—	min 0	—	Quoted amount.
price.currency	String	yes	USDT	enum: USD / EUR / IRR / USDT / USDC	—	Quote currency.
deliveryTime.amount	Number	yes	—	min 1	—	Numeric ETA.
deliveryTime.unit	String	yes	—	enum: hours / days / weeks	—	ETA unit.
status	String	no	pending	enum: pending / accepted / rejected / withdrawn	yes	Offer status.
attachments[]	String[]	no	—	—	—	URLs of supporting files.
notes	String	no	—	trim	—	Internal/private notes.
validUntil	Date	no	—	—	—	Expiration.
createdAt	Date	auto	—	—	yes (desc)	Mongoose timestamp.
updatedAt	Date	auto	—	—	—	Mongoose timestamp.

Status enum note: Valid values are pending | accepted | rejected | withdrawn only. 'active' is not a valid status and would throw a Mongoose ValidationError if passed.

Virtuals

None defined.

Indexes

Defined at backend/src/models/SellerOffer.ts:95-98:

• { sellerId: 1 }
• { purchaseRequestId: 1 }
• { status: 1 }
• { createdAt: -1 }

Pre/Post Hooks

None declared.

Instance Methods

None defined.

Static Methods

None defined.

Service notes

createOffer — eligible parent request statuses

createOffer in SellerOfferService permits offers against a PurchaseRequest whose status is pending, received_offers, or active. Attempts against any other status are rejected.

withdrawOffer() — dead code

SellerOfferService.withdrawOffer() exists in the source but is not exposed via any HTTP route. It cannot be called through the API. Any frontend references to a withdraw endpoint will receive a 404.

Relationships

• References: User (sellerId), PurchaseRequest (purchaseRequestId).
• Referenced by: PurchaseRequest (offers[], selectedOfferId), Payment (sellerOfferId), Chat (relatedTo.id when relatedTo.type === 'SellerOffer').

State Transitions

stateDiagram-v2
    [*] --> pending
    pending --> accepted : buyer accepts
    pending --> rejected : buyer rejects
    pending --> withdrawn : seller cancels
    accepted --> [*]
    rejected --> [*]
    withdrawn --> [*]

Common Queries

// Offers for a request
SellerOffer.find({ purchaseRequestId }).sort({ createdAt: -1 });

// Seller's active offers
SellerOffer.find({ sellerId, status: 'pending' });

// Reject siblings on accept
SellerOffer.updateMany(
  { purchaseRequestId, _id: { $ne: acceptedId }, status: 'pending' },
  { status: 'rejected' }
);

// Cleanup expired offers
SellerOffer.find({ validUntil: { $lt: new Date() }, status: 'pending' });

Related: PurchaseRequest, Payment, User.