```bash
jq -r .address < deployments/mainnet/ProtocolVersionsProxy.json
0x8062AbC286f5e7D9428a0Ccb9AbD71e50d93b935

cast admin $(jq -r .address < deployments/mainnet/ProtocolVersionsProxy.json)
0x543ba4aadbab8f9025686bd03993043599c6fb04

cast implementation $(jq -r .address < deployments/mainnet/ProtocolVersionsProxy.json)
0x42f0bd8313ad456a38061308857b2383fe2c72a0

jq -r .address < deployments/mainnet/ProtocolVersions.json
0x42F0bD8313ad456A38061308857b2383fe2c72a0

cast call $(jq -r .address < deployments/mainnet/ProtocolVersionsProxy.json) 'recommended()'
0x0000000000000000000000000000000000000003000000010000000000000000

cast call $(jq -r .address < deployments/mainnet/ProtocolVersionsProxy.json) 'required()'
0x0000000000000000000000000000000000000003000000010000000000000000

go run op-chain-ops/cmd/protocol-version/main.go decode 0x0000000000000000000000000000000000000003000000010000000000000000
v3.1.0
```