Possible reasons:

• counterparty user not found
• custody vendor not configured
• leg_a.amount must be positive
• leg_b.amount must be positive
• transaction with this external_id was already attempted
• unknown asset_code for leg_a
• unknown asset_code for leg_b

Not authenticated

the authority account cannot be used as the account for a transaction

Not found

user is archived

The request body is valid JSON but does not match the expected schema.

Possible reasons:

• attempt to verify existing contract failed
• could not begin transactional query
• failed to build swap contract
• failed to commit database transaction
• failed to create transaction
• failed to get asset code for leg_a
• failed to get asset code for leg_b
• failed to get treasury user
• failed to look up counterparty user
• failed to look up source vault for leg_a
• failed to look up source vault for leg_b
• failed to save contract
• treasury user is not configured