Massively decrease payment processing fees by bundling orders

[darkdragon-001]

User story

As financial contributor, I want to donate money to many open source projects (not to payment processors) so that they can build great software.

Best solution for this problem

As many collectives share a common fiscal host and payment processing fees usually contain a fixed amount, by bundling many orders to the fiscal host, the payment processing fees can be split up.

Example:

• If I want to share $10 among 10 collectives on the same fiscal host, I need to pay 10*$0.30=$3=3% of static payment processing fees to stripe (excluding dynamic porcentual ones).
• If I could submit all 10 orders in a single API request, you could submit a single payment to the shared collective such that only 1*$0.30=$0.30=0.3% of payment processing fees need to be paid.

MVP

Add mutation createOrders(orders: [OrderCreateInput]]) to submit multiple orders in a single API request and bundle transactions to common fiscal hosts.

Metrics

Reduced payment processing fees.

[znarf]

We're tracking this here: #1916

Current alternatives:

• Use a prepaid payment method: contribute to "Prepaid budget" here https://opencollective.com/opensource
• Convert account to a Fund and wire money to Fiscal Host through bank transfer

[darkdragon-001]

Thanks for the link!

I think this approach here could be used to split up the big and complex task into smaller chunks as it completely avoids the UI part.

It basically involves

• Adding multiple recipient references to single payments
• Splitting up received money among the multiple recipients specified in the payment
• Add the API endpoint