Merge pull request #67 from blockscout/va-arc-chain-dual-token

Env variables for Arc chain type

Author: vbaranov

setup/env-variables/backend-env-variables.mdx

@@ -134,7 +134,7 @@ Can be set in format `1h` for 1 hour, `1m` for 1 minute, `1s` or `1` for 1 secon
 | `API_SENSITIVE_ENDPOINTS_KEY`                           | API key to protect some sensitive endpoints. Implemented in [#7355](https://github.com/blockscout/blockscout/pull/7355)                                                                                                                                                                                                                                                                                                                            | Version: v5.1.5\+ <br />Default: (empty) <br />Applications: API                                                                                                                                                                                                                                                                                                                |
 | `CHECKSUM_ADDRESS_HASHES`                               | If set to `true`, redirects to checksummed version of address hashes.                                                                                                                                                                                                                                                                                                                                                                              | Version: v3.1.0\+ <br />Default: `true` <br />Applications: API                                                                                                                                                                                                                                                                                                                 |
 | `CHECKSUM_FUNCTION`                                     | Defines checksum address function. 2 available values: `rsk`, `eth`                                                                                                                                                                                                                                                                                                                                                                                | Version: v2.0.1\+ <br />Default: `eth` <br />Applications: API                                                                                                                                                                                                                                                                                                                  |
-| `CHAIN_TYPE`                                            | Specifies the blockchain architecture and enables chain-specific data models and fetchers.                                                                                                                                                                                                                                                                                                                                                         | Runtime configurable (v8.0.0\+): `neon`, `stability`, `blackfort`, `shibarium` Needs recompilation: `ethereum`, `optimism`, `arbitrum`, `optimism-celo` (formerly `celo` before v9.3.0), `polygon_zkevm`, `rsk`, `suave`, `zetachain`, `filecoin`, `zilliqa`, and other values prior to v8.0.0 Version: v5.3.0\+ <br />Default: `default` <br />Applications: API, Indexer        |
+| `CHAIN_TYPE`                                            | Specifies the blockchain architecture and enables chain-specific data models and fetchers.                                                                                                                                                                                                                                                                                                                                                         | Runtime configurable (v8.0.0\+): `neon`, `stability`, `blackfort`, `shibarium`, `arc` Needs recompilation: `ethereum`, `optimism`, `arbitrum`, `optimism-celo` (formerly `celo` before v9.3.0), `polygon_zkevm`, `rsk`, `suave`, `zetachain`, `filecoin`, `zilliqa`, and other values prior to v8.0.0 Version: v5.3.0\+ <br />Default: `default` <br />Applications: API, Indexer        |
 | `CHAIN_ID`                                              | Chain ID of the network. For instance, 100 in the case of xDai chain.                                                                                                                                                                                                                                                                                                                                                                              | Version: v3.7.0\+ <br />Default: (empty) <br />Applications: API, Indexer                                                                                                                                                                                                                                                                                                       |
 | `JSON_RPC`                                              | JSON RPC endpoint of the chain for the WalletConnect integration. Implemented in [#4931](https://github.com/blockscout/blockscout/pull/4931)                                                                                                                                                                                                                                                                                                       | Version: v4.1.0\+ <br />Default: (empty) <br />Applications: API, Indexer                                                                                                                                                                                                                                                                                                       |
 | `HEALTH_MONITOR_CHECK_INTERVAL`                         | Interval between health stats collection. [Time format](/setup/env-variables/backend-env-variables#time-format). Implemented in [#11888](https://github.com/blockscout/blockscout/pull/11888/)                                                                                                                                                                                                                                                     | Version: v8.0.0\+ <br />Default: `1m` <br />Applications: API, Indexer                                                                                                                                                                                                                                                                                                          |

setup/env-variables/backend-envs-chain-specific.mdx

@@ -356,3 +356,16 @@ Supported together with setting `CHAIN_TYPE=blackfort`
 | Variable                      | Description                                                                                                                              | Parameters                                                   |
 | ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
 | `BLACKFORT_VALIDATOR_API_URL` | Variable to define the URL of the Blackfort Validator API. Implemented in [#10744](https://github.com/blockscout/blockscout/pull/10744). | Version: v6.9.0+ <br />Default: (empty) <br />Applications: API, Indexer |
+
+## Arc Management
+
+<Info>
+Supported together with setting `CHAIN_TYPE=arc`
+
+</Info>
+
+| Variable                                   | Description                                                                                                                                             | Parameters                                                                                              |
+| ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- |
+| `INDEXER_ARC_NATIVE_TOKEN_DECIMALS`        | Defines the number of decimals for Arc chain native token (e.g. USDC). Implemented in [#13452](https://github.com/blockscout/blockscout/pull/13452).    | Version: master <br />Default: `6` <br />Applications: Indexer                                          |
+| `INDEXER_ARC_NATIVE_TOKEN_CONTRACT`        | Arc chain native token contract address. Implemented in [#13452](https://github.com/blockscout/blockscout/pull/13452).                                  | Version: master <br />Default: `0x3600000000000000000000000000000000000000` <br />Applications: Indexer |
+| `INDEXER_ARC_NATIVE_TOKEN_SYSTEM_CONTRACT` | Arc chain system contract address emitting `NativeCoinTransferred` event. Implemented in [#13452](https://github.com/blockscout/blockscout/pull/13452). | Version: master <br />Default: `0x1800000000000000000000000000000000000000` <br />Applications: Indexer |