# Horizon v1.0.0 Compatibility

The upcoming Horizon release is coming, and there are multiple breaking changes plus new features 🎉🎉🎉!

The following are the list of changes required to support this new release:

- [ ] ➕Update `/fee_stats` response.
<details>

- ✂ Remove the following fields:

       min_accepted_fee
       mode_accepted_fee
       p10_accepted_fee
       p20_accepted_fee
       p30_accepted_fee
       p40_accepted_fee
       p50_accepted_fee
       p60_accepted_fee
       p70_accepted_fee
       p80_accepted_fee
       p90_accepted_fee
       p95_accepted_fee
       p99_accepted_fee

- ➕Add support for `max_fee` and `fee_charged` fields. Each field contains a JSON object that looks like this:

       {
         "last_ledger": "22606298",
         "last_ledger_base_fee": "100",
         "ledger_capacity_usage": "0.97",
         "fee_charged": {
           "max": "100",
           "min": "100",
           "mode": "100",
           "p10": "100",
           "p20": "100",
           "p30": "100",
           "p40": "100",
           "p50": "100",
           "p60": "100",
           "p70": "100",
           "p80": "100",
           "p90": "100",
           "p95": "100",
           "p99": "100"
         },
         "max_fee": {
           "max": "100000",
           "min": "100",
           "mode": "100",
           "p10": "100",
           "p20": "100",
           "p30": "100",
           "p40": "100",
           "p50": "100",
           "p60": "100",
           "p70": "100",
           "p80": "100",
           "p90": "15000",
           "p95": "100000",
           "p99": "100000"
         }
        }

See https://github.com/stellar/go/pull/2140 for more info.
</details>

- [ ] ✂ Remove deprecated `fee_paid` field from Transaction response (replace it with the `fee_charged` and `max_fee` fields, see [#1372](https://github.com/stellar/go/issues/1372)).

- [ ] 🚨Multiple fields changed from `int64` to `string`. If your SDK has types, they need to be updated. If possible, we recommend implementing backward compatibility support, as we did [here](https://github.com/stellar/go/blob/master/protocols/horizon/main.go#L258).
<details>

- Attribute `offer_id` in [manage buy offer](https://www.stellar.org/developers/horizon/reference/resources/operation.html#manage-buy-offer) and [manage sell offer](https://www.stellar.org/developers/horizon/reference/resources/operation.html#manage-sell-offer) operations.

- Attribute `offer_id` in `Trade` effect.

- Attribute `id` in [Offer](https://www.stellar.org/developers/horizon/reference/resources/offer.html) resource.

- Attribute `timestamp` and `trade_count` in [Trade Aggregation](https://www.stellar.org/developers/horizon/reference/resources/trade_aggregation.html) resource.

See https://github.com/stellar/go/issues/1609, https://github.com/stellar/go/pull/1909, and https://github.com/stellar/go/issues/1912 for more info
</details>

- [ ] 🚨 Update operation types to canonical names (if needed) (see https://github.com/stellar/go/pull/2134).
- [ ] ➕Add support for `/accounts` end-point with `?signer` and `?asset` filters. We recommend a method like `.accounts(queryParams)` (see [documentation for accounts](https://www.stellar.org/developers/horizon/reference/endpoints/accounts.html)).
- [ ] ➕Add support for `/offers` end-point with query parameters. We recommend a method like `.offers(queryParams)` (see [documentation for offers](https://www.stellar.org/developers/horizon/reference/endpoints/offers.html)).
- [ ] ➕Add support for `/paths/strict-send` end-point. See [documentation](https://www.stellar.org/developers/horizon/reference/endpoints/path-finding-strict-send.html).
We recommend a method like

strictSendPaths(sourceAsset, sourceAmount, [destinationAsset])

- [ ] ➕ Add support for `/paths/strict-receive` end-point. See [documentation](https://www.stellar.org/developers/horizon/reference/endpoints/path-finding-strict-receive.html).
We recommend a method like:

strictReceivePaths(sourceAssets,destinationAsset, destinationAmount)

- [ ] ♻ Regenerate the XDR definitions to include [MetaV2](https://github.com/jonjove/stellar-core/blob/b299b3a458a15f592352c67d4da69baa6e8fbb6a/src/xdr/Stellar-ledger.x#L309) support (also see [#1902](https://github.com/stellar/go/issues/1902)).

That's it! If you have any questions feel free to ping us on #dev-discussion in [Keybase](https://keybase.io/team/stellar.public).