3DPass Node interaction

Node Interaction

In this tutorial we'll get you through some basic operations with your node. However, you should always refer to the proper documentation for the tool you are using:

• Substrate RPC API
• Polkadot-JS RPC
• Substrate Sidecar

Polkadot-JS RPC is a JavaScript library for interacting with the Substrate RPC API endpoint, distributed as @polkadot/api Node.js package. Substrate API Sidecar is using the Polkadot-JS RPC to provide separately runnable REST services.

3DPass RPC

As most of the nodes based on Substrate, 3DPass Node exposes HTTP and WS endpoints for RPC connections. The default ports are 9933 for HTTP and 9944 for WS.

In order to get a list of all RPC methods available, the node has an RPC endpoint called rpc_methods.

For example:

$ curl -H "Content-Type: application/json" -d '{"id":1, "jsonrpc":"2.0", "method": "rpc_methods"}' http://localhost:9933/

{"jsonrpc":"2.0","result":{"methods":["account_nextIndex","author_hasKey","author_hasSessionKeys","author_insertKey","author_pendingExtrinsics","author_removeExtrinsic","author_rotateKeys","author_submitAndWatchExtrinsic","author_submitExtrinsic","author_unwatchExtrinsic","chain_getBlock","chain_getBlockHash","chain_getFinalisedHead","chain_getFinalizedHead","chain_getHead","chain_getHeader","chain_getRuntimeVersion","chain_subscribeAllHeads","chain_subscribeFinalisedHeads","chain_subscribeFinalizedHeads","chain_subscribeNewHead","chain_subscribeNewHeads","chain_subscribeRuntimeVersion","chain_unsubscribeAllHeads","chain_unsubscribeFinalisedHeads","chain_unsubscribeFinalizedHeads","chain_unsubscribeNewHead","chain_unsubscribeNewHeads","chain_unsubscribeRuntimeVersion","offchain_localStorageGet","offchain_localStorageSet","payment_queryInfo","state_call","state_callAt","state_getChildKeys","state_getChildStorage","state_getChildStorageHash","state_getChildStorageSize","state_getKeys","state_getKeysPaged","state_getKeysPagedAt","state_getMetadata","state_getPairs","state_getRuntimeVersion","state_getStorage","state_getStorageAt","state_getStorageHash","state_getStorageHashAt","state_getStorageSize","state_getStorageSizeAt","state_queryStorage","state_subscribeRuntimeVersion","state_subscribeStorage","state_unsubscribeRuntimeVersion","state_unsubscribeStorage","subscribe_newHead","system_accountNextIndex","system_addReservedPeer","system_chain","system_health","system_name","system_networkState","system_nodeRoles","system_peers","system_properties","system_removeReservedPeer","system_version","unsubscribe_newHead"],"version":1},"id":1}

Be noticed that this call will show all RPC methods available, including ones disabled by a safety flag like --rpc-methods Safe