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Local RPC Server & JSON-RPC API Quick Start

Welcome to the Sui RPC server quick start.

This document walks you through setting up your own local Sui RPC Server and using the Sui JSON-RPC API to interact with a local Sui network. This guide is useful for developers interested in Sui network interactions via API. For a similar guide on Sui network interactions via CLI, refer to the wallet documentation.

Local RPC server setup

Follow the instructions to install Sui binaries.

Start local Sui network

Follow the instructions to create and start the Sui network. The genesis process will create a gateway.conf configuration file that will be used by the RPC server.

Start local RPC server

Use the following command to start a local server:

$ rpc-server

You will see output resembling:

2022-04-25T11:06:40.147259Z  INFO rpc_server: Gateway config file path: ".sui/sui_config/gateway.conf"
2022-04-25T11:06:40.147277Z  INFO rpc_server: AccessControl { allowed_hosts: Any, allowed_origins: None, allowed_headers: Any, continue_on_invalid_cors: false }
2022-04-25T11:06:40.163568Z  INFO rpc_server: Available JSON-RPC methods : ["sui_moveCall", "sui_getTransaction", "sui_getObjectTypedInfo", "sui_getTotalTransactionNumber", "sui_getOwnedObjects", "sui_getObjectInfoRaw", "sui_transferCoin", "sui_executeTransaction", "sui_mergeCoins", "sui_getRecentTransactions", "sui_getTransactionsInRange", "rpc.discover", "sui_splitCoin", "sui_publish", "sui_syncAccountState"]
2022-04-25T11:06:40.163590Z  INFO rpc_server: Sui RPC Gateway listening on local_addr:127.0.0.1:5001

Note: For additional logs, set RUST_LOG=debug before invoking rpc-server.

Export a local user variable to store the hardcoded hostname + port that the local RPC server starts with to be used when issuing the curl commands that follow.

export SUI_RPC_HOST=http://127.0.0.1:5001

Sui JSON-RPC API

In the following sections we will show how to use Sui's JSON-RPC API with the curl command.

Sui JSON-RPC methods

rpc.discover

Sui RPC server supports OpenRPC’s service discovery method. A rpc.discover method is added to provide documentation describing our JSON-RPC APIs service.

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0", "method":"rpc.discover","id":1}'

You can see an example of the discovery service in the OpenRPC Playground.

sui_syncAccountState

Synchronize client state with validators with the following command, replacing {{address}} with an actual address value, for example one obtained from wallet.conf:

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0", "method":"sui_syncAccountState", "params":["{{address}}"], "id":1}'

This will fetch the latest information on all objects owned by each address that is managed by this server. This command has no output.

sui_getOwnedObjects

Return the list of objects owned by an address:

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0", "method":"sui_getOwnedObjects", "params":["{{address}}"], "id":1}' | json_pp

You should replace {{address}} in the command above with an actual address value, you can retrieve the list of the addresses created during genesis from wallet.conf. Ensure you have run sui_syncAccountState

The output you see should resemble the following (abbreviated to show only two objects):

{
   "id" : 1,
   "jsonrpc" : "2.0",
   "result" : {
      "objects" : [
         {
            "digest" : "zpa45U9ANfA9A6iS01NvAoVH0RbYB6a5rjhgh2Hb/GE=",
            "objectId" : "0x17b348903b0cfb75fc9ab5426bb69d83d1e756a5",
            "version" : 1
         },
         {
            "digest" : "8SPi0h6xVMVNBvGzzF4RfuOoaXISdtiB5aT7+BYDbxg=",
            "objectId" : "0x7599d8ea1de4c9616d077f16ca0eb38cdecacc07",
            "version" : 1
         },
         ...
      ]
   }
}

GET sui_getObjectInfoRaw

Return the object information for a specified object, for example:

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0", "method":"sui_getObjectInfoRaw", "params":["{{object_id}}"], "id":1}' | json_pp

Replace {{object_id}} in the command above with an actual object ID, for example one obtained from sui_getOwnedObjects (without quotes).

sui_transferCoin

1, Create a transaction to transfer a Sui coin from one address to another:

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0",
              "method":"sui_transferCoin",
              "params":["{{owner_address}}",
                        "{{coin_object_id}}",
                        "{{gas_object_id}}",
                        {{gas_budget}},
                        "{{to_address}}"],
              "id":1}' | json_pp

A transaction data response will be returned from the gateway server.

{
  "id" : 1,
  "jsonrpc" : "2.0",
  "result" : {
    "tx_bytes" : "VHJhbnNhY3Rpb25EYXRhOjoAAFHe8jecgzoGWyGlZ1sJ2KBFN8aZF7NIkDsM+3X8mrVCa7adg9HnVqUBAAAAAAAAACDOlrjlT0A18D0DqJLTU28ChUfRFtgHprmuOGCHYdv8YVHe8jecgzoGWyGlZ1sJ2KBFN8aZdZnY6h3kyWFtB38Wyg6zjN7KzAcBAAAAAAAAACDxI+LSHrFUxU0G8bPMXhF+46hpchJ22IHlpPv4FgNvGOgDAAAAAAAA"
  }
}

2, Sign the transaction using the Sui signtool

sui signtool --address <owner_address> --data <tx_bytes>

The signing tool will create and print out the signature and public key information. You will see output resembling:

2022-04-25T18:50:06.031722Z  INFO sui::sui_commands: Data to sign : VHJhbnNhY3Rpb25EYXRhOjoAAFHe8jecgzoGWyGlZ1sJ2KBFN8aZF7NIkDsM+3X8mrVCa7adg9HnVqUBAAAAAAAAACDOlrjlT0A18D0DqJLTU28ChUfRFtgHprmuOGCHYdv8YVHe8jecgzoGWyGlZ1sJ2KBFN8aZdZnY6h3kyWFtB38Wyg6zjN7KzAcBAAAAAAAAACDxI+LSHrFUxU0G8bPMXhF+46hpchJ22IHlpPv4FgNvGOgDAAAAAAAA
2022-04-25T18:50:06.031765Z  INFO sui::sui_commands: Address : 0x51def2379c833a065b21a5675b09d8a04537c699
2022-04-25T18:50:06.031911Z  INFO sui::sui_commands: Public Key Base64: H82FDLUZN1u0+6UdZilxu9HDT5rPd3khKo2UJoCPJFo=
2022-04-25T18:50:06.031925Z  INFO sui::sui_commands: Signature : 6vc+ku0RsMKdky8DRfoy/hw6eCQ3YsadH6rZ9WUCwGTAumuWER3TOJRw7u7F4QaHkqUsIPfJN9GRraSX+N8ADQ==

3, Execute the transaction using the transaction data, signature and public key.

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0",
              "method":"sui_executeTransaction",
              "params":[{
                  "tx_bytes" : "{{tx_bytes}}",
                  "signature" : "{{signature}}",
                  "pub_key" : "{{pub_key}}"}],
              "id":1}' | json_pp

Native transfer by sui_transferCoin is supported for coin objects only (including gas objects). Refer to transactions documentation for more information about a native transfer. Non-coin objects cannot be transferred natively and require a Move call.

You should replace {{owner_address}} and {{to_address}} in the command above with an actual address values, for example one obtained from wallet.conf. You should also replace {{coin_object_id}} and {{gas_object_id}} in the command above with an actual object ID, for example one obtained from objectId in the output of sui_getOwnedObjects. You can see that all gas objects generated during genesis are of Coin/SUI type). For this call to work, objects represented by both {{coin_object_id}} and {{gas_object_id}} must be owned by the address represented by {{owner_address}}.

sui_moveCall

1, Execute a Move call transaction by calling the specified function in

the module of a given package (smart contracts in Sui are written in the Move language):

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc": "2.0",
              "method": "sui_moveCall",
              "params": [
                  "{{owner_address}}",
                  "0x2",
                  "coin",
                  "transfer",
                  ["0x2::sui::sui"],
                  ["{{coin_object_id}}", "{{recipient_address}}"],
                  "{{gas_object_id}}",
                  2000
              ],
              "id": 1 }' | json_pp

2, Sign the transaction

Follow the instructions to sign the transaction.

3, Execute the transaction

Follow the instructions to execute the transaction.

Arguments are passed in, and type will be inferred from function signature. Gas usage is capped by the gas_budget. The transfer function is described in more detail in the Sui Wallet documentation.

Calling the transfer function in the Coin module serves the same purpose as the native coin transfer (sui_transferCoin), and is mostly used for illustration purposes as native transfer is more efficient when it's applicable (i.e., we are transferring coins rather than non-coin objects). Consequently, you should fill out argument placeholders ({{owner_address}}, {{coin_object_id}, etc.) the same way you would for sui_transferCoin - please note additional 0x prepended to function arguments.

To learn more about what args are accepted in a Move call, refer to the SuiJSON documentation.

sui_publish

Publish Move module.

curl --location --request POST $SUI_RPC_HOST \
--header 'Content-Type: application/json' \
--data-raw '{ "jsonrpc":"2.0",
              "method":"sui_publish",
              "params":[ "{{owner_address}}",
                         {{vector_of_compiled_modules}},
                         "{{gas_object_id}}",
                         10000],
              "id":1}' | json_pp

This endpoint will perform proper verification and linking to make sure the package is valid. If some modules have initializers, these initializers will also be executed in Move (which means new Move objects can be created in the process of publishing a Move package). Gas budget is required because of the need to execute module initializers.

You should replace {{owner_address}} in the command above with an actual address values, for example one obtained from wallet.conf. You should also replace {{gas_object_id}} in the command above with an actual object ID, for example one obtained from objectId in the output of sui_getownedobjects. You can see that all gas objects generated during genesis are of Coin/SUI type). For this call to work, the object represented by {{gas_object_id}} must be owned by the address represented by {{owner_address}}.

To publish a Move module, you also need {{vector_of_compiled_modules}}. To generate the value of this field, use the sui-move command. The sui-move command supports printing the bytecodes as base64 with the following option

sui-move --path <move-module-path> build --dump-bytecode-as-base64

Assuming that the location of the package's sources is in the PATH_TO_PACKAGE environment variable an example command would resemble the following

sui-move --path $PATH_TO_PACKAGE/my_move_package build --dump-bytecode-as-base64

["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", "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"]
Build Successful

Copy the outputting base64 representation of the compiled Move module into the REST publish endpoint.

2, Sign the transaction

Follow the instructions to sign the transaction.

3, Execute the transaction

Follow the instructions to execute the transaction.

Below you can see a truncated sample output of sui_publish. One of the results of executing this command is generation of a package object representing the published Move code. An ID of the package object can be used as an argument for subsequent Move calls to functions defined in this package.

{
    "package": [
            "0x13e3ec7279060663e1bbc45aaf5859113fc164d2",
    ...
}

Connect to remote JSON-RPC server

Coming soon - alternative ways of working with Sui's JSON-RPC API. Connect to Sui devnet, testnet, or mainnet!