curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=toncoin \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "packAddress",
    "params": {
      "address": "EQDtFpEwcFAEcRe5mLVh2N6C0x-_hJEM7W61_JLnSF74p4q2"
    }
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "EQCD39VS5jcptHL8vMjEXrzGaRcCVYto7HUn4bpAOg8xqB2N"
}