vega-frontend-monorepo/apps/trading/lib/hooks/StakeAvailable.graphql

query StakeAvailable($partyId: ID!) {
  party(id: $partyId) {
    stakingSummary {
      currentStakeAvailable
    }
  }
  networkParameter(key: "referralProgram.minStakedVegaTokens") {
    value
  }
}