fix(reference): remove index methods from FtsoV2Interface

docs/ftso/5-migration.mdx

@@ -14,7 +14,7 @@ This guide is for applications moving from FTSOv1 to FTSOv2. Briefly, FTSOv2 com
 - **[Block-Latency Feeds](/ftso/feeds)**: These feeds are updated with each new block, approximately every 1.8 seconds. They can be accessed through [FtsoV2Interface](/ftso/solidity-reference/FtsoV2Interface) and are available directly on-chain.
 - **[Anchor Feeds](/ftso/scaling/anchor-feeds)**: These feeds are provided through [Scaling](/ftso/scaling/overview) with a latency of 90 seconds. Feeds can be verified using [FtsoV2Interface](/ftso/solidity-reference/FtsoV2Interface) but are not immediately available on-chain.
 
-A key difference between the two is the introduction of a payment mechanism for data access. This system helps prevent unnecessary data requests and ensures sustainable funding. For more details, refer to the [`IFeeCalculator`](/ftso/solidity-reference/IFeeCalculator) contract, which calculates fees for data access using the [`calculateFeeByIds`](/ftso/solidity-reference/IFeeCalculator#calculatefeebyids) and [`calculateFeeByIndices`](/ftso/solidity-reference/IFeeCalculator#calculatefeebyindices) methods.
+A key difference between the two is the introduction of a payment mechanism for data access. This system helps prevent unnecessary data requests and ensures sustainable funding. For more details, refer to the [`IFeeCalculator`](/ftso/solidity-reference/IFeeCalculator) contract, which calculates fees for data access using the [`calculateFeeByIds`](/ftso/solidity-reference/IFeeCalculator#calculatefeebyids) method.
 
 Additionally, a new Long Term Support (LTS) system has been launched to ensure continued access to essential data and metadata within the Flare ecosystem. A series of [LTS interfaces](#lts-interfaces) have been introduced, each aligned with a specific product in the Flare ecosystem. It is strongly recommended to use these LTS contracts for data access instead of querying individual contracts or interfaces, as they are designed for long-term stability, even as underlying protocols evolve or migrate.
 
@@ -93,7 +93,7 @@ The primary goal of the Long Term Support (LTS) interfaces is to offer a stable
 :::warning
 
 - **RandomNumberV2Interface:** In addition to providing random numbers, the new methods also return a `_isSecureRandom` flag. Learn more about this flag in the guide on [Secure Random Numbers](/network/guides/secure-random-numbers).
-- **FtsoV2Interface:** Provides access to both block-latency and anchor feeds. You can retrieve feeds using the [`getFeedById`](/ftso/solidity-reference/FtsoV2Interface#getfeedbyid) or [`getFeedByIndex`](/ftso/solidity-reference/FtsoV2Interface#getfeedbyindex) methods. These methods are now payable, and while the current fee is set to `0`, it is advisable to use [`FeeCalculator`](/ftso/solidity-reference/IFeeCalculator) to calculate the fee and be prepared for potential future changes.
+- **FtsoV2Interface:** Provides access to fetching block-latency feeds onchain, and verifying anchor feeds onchain. You can retrieve feeds using the [`getFeedById`](/ftso/solidity-reference/FtsoV2Interface#getfeedbyid) or [`getFeedsById`](/ftso/solidity-reference/FtsoV2Interface#getfeedsbyid) methods. These methods are now payable, and while the current fee is set to `0`, it is advisable to use [`FeeCalculator`](/ftso/solidity-reference/IFeeCalculator) to calculate the fee and be prepared for potential future changes.
 
 :::
 

docs/ftso/solidity-reference/FtsoV2Interface.md

@@ -7,11 +7,9 @@ description: Primary interface for interacting with FTSOv2.
 import Remix from "@site/src/components/remix";
 import CodeBlock from "@theme/CodeBlock";
 import FTSOV2FeedById from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedById.sol";
-import FTSOV2FeedByIndex from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedByIndex.sol";
 import FTSOV2FeedByIdWei from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedByIdWei.sol";
 import FTSOV2FeedsById from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedsById.sol";
 import FTSOV2FeedsByIdWei from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedsByIdWei.sol";
-import FTSOV2FeedsByIndexWei from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2FeedsByIndexWei.sol";
 import FTSOV2VerifyProof from "!!raw-loader!/examples/developer-hub-solidity/FTSOV2VerifyProof.sol";
 
 Primary interface for interacting with FTSOv2. This is a long-term support (LTS) interface, designed to ensure continuity even as underlying contracts evolve or protocols migrate to new versions.
@@ -55,7 +53,6 @@ function getFeedById(
 </details>
 
 <Remix fileName="FTSOV2FeedById.sol">Open sample in Remix</Remix>
-<br></br>
 
 ### getFeedByIdInWei
 
@@ -90,64 +87,6 @@ function getFeedByIdInWei(
 </details>
 
 <Remix fileName="FTSOV2FeedByIdWei.sol">Open sample in Remix</Remix>
-<br></br>
-
-### getFeedByIndex
-
-Returns stored data of a feed.
-A fee (calculated by the FeeCalculator contract) may need to be paid.
-
-```solidity
-function getFeedByIndex(
-    uint256 _index
-) external payable returns (
-    uint256 _value,
-    int8 _decimals,
-    uint64 _timestamp
-);
-```
-
-#### Parameters
-
-- `_index`: The index of the feed, corresponding to feed id in the FastUpdatesConfiguration contract.
-
-#### Returns
-
-- `_value`: The value for the requested feed.
-- `_decimals`: The decimal places for the requested feed.
-- `_timestamp`: The timestamp of the last update.
-
-<details>
-<summary>Sample contract usage</summary>
-
-<CodeBlock language="solidity" title="FTSOV2FeedByIndex.sol">
-  {FTSOV2FeedByIndex}
-</CodeBlock>
-
-</details>
-
-<Remix fileName="FTSOV2FeedByIndex.sol">Open sample in Remix</Remix>
-<br></br>
-
-### getFeedIndex
-
-Returns the index of a feed.
-
-```solidity
-function getFeedIndex(
-    bytes21 _feedId
-) external view returns (
-    uint256 _index
-);
-```
-
-#### Parameters
-
-- `_feedId`: The feed id.
-
-#### Returns
-
-- `_index`: The index of the feed.
 
 ### getFeedsById
 
@@ -184,7 +123,6 @@ function getFeedsById(
 </details>
 
 <Remix fileName="FTSOV2FeedsById.sol">Open sample in Remix</Remix>
-<br></br>
 
 ### getFeedsByIdInWei
 
@@ -219,42 +157,6 @@ function getFeedsByIdInWei(
 </details>
 
 <Remix fileName="FTSOV2FeedsByIdWei.sol">Open sample in Remix</Remix>
-<br></br>
-
-### getFeedsByIndexInWei
-
-Returns value in wei of each feed and a timestamp.
-For some feeds, a fee (calculated by the FeeCalculator contract) may need to be paid.
-
-```solidity
-function getFeedsByIndexInWei(
-    uint256[] _indices
-) external payable returns (
-    uint256[] _values,
-    uint64 _timestamp
-);
-```
-
-#### Parameters
-
-- `_indices`: Indices of the feeds, corresponding to feed ids in the FastUpdatesConfiguration contract.
-
-#### Returns
-
-- `_values`: The list of values for the requested feeds in wei (i.e. with 18 decimal places).
-- `_timestamp`: The timestamp of the last update.
-
-<details>
-<summary>Sample contract usage</summary>
-
-<CodeBlock language="solidity" title="FTSOV2FeedsByIndexWei.sol">
-  {FTSOV2FeedsByIndexWei}
-</CodeBlock>
-
-</details>
-
-<Remix fileName="FTSOV2FeedsByIndexWei.sol">Open sample in Remix</Remix>
-<br></br>
 
 ### verifyFeedData
 
@@ -286,7 +188,6 @@ function verifyFeedData(
 </details>
 
 <Remix fileName="FTSOV2VerifyProof.sol">Open sample in Remix</Remix>
-<br></br>
 
 ## Structures
 

docs/ftso/solidity-reference/IFeeCalculator.md

@@ -25,19 +25,3 @@ function calculateFeeByIds(
 #### Parameters
 
 - `_feedIds`: List of feed ids.
-
-### calculateFeeByIndices
-
-Calculates a fee that needs to be paid to fetch feeds' data.
-
-```solidity
-function calculateFeeByIndices(
-    uint256[] _indices
-) external view returns (
-    uint256 _fee
-);
-```
-
-#### Parameters
-
-- `_indices`: Indices of the feeds, corresponding to feed ids in the FastUpdatesConfiguration contract.