Return a single invoice with full metadata fields.
JWT token for wallet authentication
Invoice ID
Comma-separated expansions (latest_payment, payments).
Max payments per invoice when expand includes payments.
1 <= x <= 100Invoice retrieved successfully
Canonical invoice object (snake_case, usd_millis amounts).
"invoice"
"550e8400-e29b-41d4-a716-446655440000"
123
"paid"
"standard"
"usd"
10000
"10.000"
10000
"10.000"
0
"0.000"
"usd_millis"
devnet, mainnet Canonical invoice_payment object (merchant surfaces include settlement fields; payor surfaces strip them).