Optimism

Optimism is a Layer 2 scaling solution on Ethereum to reduce gas fees, process new transactions faster, thereby providing a smoother user experience while maintaining security from the Ethereum original chain. Optimism is an Optimistic Roll-up project, using a fraud-proof security mechanism.

Quick Links

**[Optimism](https://www.optimism.io/)**

**[Docs](https://community.optimism.io/)​**

**[Github](https://github.com/ethereum-optimism)**

Connect wallet

You can set up your MetaMask wallet to connect to Optimism 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
Optimism	NETWORK NAME:	Optimism RPC
	NEW RPC URL:	https://username.chainprtcl.net/op/uid
	CHAIN ID:	10
	SYMBOL:	ETH
	BLOCK EXPLORER:	https://optimistic.etherscan.io/

Integrate Code

web3 library

• clientVersion

Returns the current client version.

Example request

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

Example response

{"jsonrpc":"2.0","id":1,"result":"Geth/v1.9.10-stable/linux-amd64/go1.18"}

net library

• net_version

Returns the current network id.

Example request

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

Example response

{"jsonrpc":"2.0","id":67,"result":"10"}

eth library

Example request

eth_estimateGas

Returns the gas price for the transaction in hex.

curl https://username.chainprtcl.net/op/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","id":1,"error":{"code":-32000,"message":"gas required exceeds allowance (15000000)"}

Pricing

Node Type	Price (USD)
Fullnode	$190
Archive Node	$515
Testnet	$190