Polygon

Polygon is a Layer 2 scaling solution that achieves scale by utilizing sidechains for off-chain computation and a decentralized network of Proof-of-Stake (PoS) validators.

Quick links

**[Polygon Chain](https://polygon.technology/)**

**[Docs](https://wiki.polygon.technology/)**

Github

Connect wallet

You can set up your MetaMask wallet to connect to Polygon RPC. You can then perform transactions and interact with the network.

Get started

1. Open your Metamask Extension and click the 'Network' drop down menu at the top.
2. Select 'Custom RPC'
3. Enter the settings below:

Chain	Custom RPC Category	Details
Polygon	NETWORK NAME:	Polygon RPC
	NEW RPC URL:	https://username.chainprtcl.net/polygon/uid
	CHAIN ID:	137
	SYMBOL:	MATIC
	BLOCK EXPLORER:	https://polygonscan.com/

Integrate Code

web3 library

• clientVersion

Returns the current client version.

Example request

curl https://username.chainprtcl.net/polygon/uid \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}'

Example response

{"jsonrpc":"2.0","result":"OpenEthereum//v3.3.0-rc.15-stable-88eb7d325-20211104/x86_64-linux-gnu/rustc1.48.0","id":1}

net library

• net_version

Returns the current network id.

Example request

curl https://username.chainprtcl.net/polygon/uid \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'

Example response

{"jsonrpc":"2.0","result":"100","id":67}

eth library

Example request

eth_estimateGas

Returns the gas price for the transaction in hex.

curl https://username.chainprtcl.net/polygon/uid \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{
    "jsonrpc":"2.0",
    "method":"eth_estimateGas",
    "params":[{
    "from": "0x8D97689C9818892B700e27F316cc3E41e17fBeb9",
    "to": "0xd3CdA913deB6f67967B99D67aCDFa1712C293601",
    "value": "0x186a0"
    }],
    "id":1
}'

Example response

{"jsonrpc":"2.0","result":"0x5208","id":1}

Pricing

Node Type	Price (USD)
Fullnode	$2132