getSignaturesForAddress

curl --request POST \
  --url https://mainnet.helius-rpc.com/ \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "getSignaturesForAddress",
  "params": [
    "Vote111111111111111111111111111111111111111"
  ]
}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": [
    {
      "signature": "5h6xBEauJ3PK6SWCZ1PGjBvj8vDdWG3KpwATGy1ARAXFSDwt8GFXM7W5Ncn16wmqokgpiKRLuS83KUxyZyv2sUYv",
      "slot": 114,
      "err": null,
      "memo": null,
      "blockTime": null,
      "confirmationStatus": "finalized"
    }
  ]
}