# RPC / API Requirements

Trust Wallet is a light client wallet, which means it needs to get data / information from remote nodes (either light nodes or full nodes). In order to integrate your blockchain into Trust Wallet smoothly, you must also fulfill RPC / API requirements. We list all needed APIs or RPCs plus an example below for your reference.

## for Trust Wallet:

We need API or RPC to:

* [ ] query account / address balance
* [ ] query transaction details
* [ ] query fee / nonce for sending transaction
* [ ] query blockchain status (block height etc)
* [ ] send raw transaction

## for Backend:

Used to create transaction list index and notify users about incoming/outgoing transactions.

* [ ] query transactions in a block

## Example

We will take XRP as an example here, it supports WebSocket, JSON-RPC (including over HTTP)

### Query account / address balance:

* [x] JSON RPC method: `account_info` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/account-methods/account\\_info>)

### Query transaction details:

* [x] JSON RPC method: `tx` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/transaction-methods/tx>)

### Query fee / nonce for sending transaction:

* [x] fee: JSON RPC method: `fee` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/server-info-methods/fee>)
* [x] nonce: same as `account_info`, you can find `Sequence` in response.

### Query blockchain status (block height etc):

* [x] JSON RPC method: `server_state` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/server-info-methods/server\\_state>)

### Send raw transaction:

* [x] JSON RPC method: `submit` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/transaction-methods/submit>)

### Query sent / received transactions for an account / address:

* [x] JSON RPC method: `account_tx` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/account-methods/account\\_tx>)

### Query transactions in a block:

* [x] JSON RPC method: `ledger` (<https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/ledger-methods/ledger>)