Transaction utilities

GET /v1/transactions/estimate-fee?wallet_id={id}&to={addr}&value={wei}&data={hex}

curl "https://api.qustody.io/v1/transactions/estimate-fee?wallet_id=wal_01HXYZ&to=0xabc...&value=1000000000000000000" \
  -H "Authorization: Bearer $QUSTODY_API_KEY"

{
  "gas_limit": "21000",
  "gas_price_wei": "1000000000",
  "max_fee_per_gas_wei": "2000000000",
  "max_priority_fee_per_gas_wei": "1500000000",
  "estimated_fee_wei": "31500000000000",
  "chain_id": 20803,
  "estimated_at": "2026-04-27T10:15:00Z"
}

GET /v1/transactions/export?format=csv&from=2026-04-01T00:00:00Z&to=2026-04-30T23:59:59Z&status=CONFIRMED

id,external_id,vault_id,wallet_id,to_address,value_wei,fee_wei,status,broadcast_tx_hash,block_number,confirmed_at,created_at

Content-Type: text/csv; charset=utf-8
Content-Disposition: attachment; filename="transactions-2026-04.csv"
X-Total-Count: 4823