getInflationRate

curl --request POST \
  --url https://mainnet.helius-rpc.com/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getInflationRate"
}'

{
  "jsonrpc": "2.0",
  "id": "1",
  "result": {
    "total": 0.149,
    "validator": 0.148,
    "foundation": 0.001,
    "epoch": 100
  }
}