Class: DhanHQ::Skills::Builtin::BuyAtmCall

Inherits:
DhanHQ::Skills::Base show all
Defined in:
lib/DhanHQ/skills/builtin/buy_atm_call.rb

Overview

Skill to buy an ATM call option on an index.

Steps: find instrument → get spot price → get option chain → select ATM strike → prepare trade intent.

Examples:

result = DhanHQ::Skills::Registry.call("buy_atm_call",
  symbol: "NIFTY",
  expiry: "2026-01-30",
  quantity: 50
)
puts result[:intent]

Instance Method Summary collapse

Methods inherited from DhanHQ::Skills::Base

#call, description, #description, #name, param, #param_definitions, params, risk, scope, step, steps, validate_params!

Instance Method Details

#find_instrument(ctx) ⇒ Object 



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# File 'lib/DhanHQ/skills/builtin/buy_atm_call.rb', line 36

def find_instrument(ctx)
  ctx[:instrument] = DhanHQ::Models::Instrument.find(DhanHQ::Constants::ExchangeSegment::IDX_I, ctx[:symbol])
  ctx
end

#get_option_chain(ctx) ⇒ Object 



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# File 'lib/DhanHQ/skills/builtin/buy_atm_call.rb', line 46

def get_option_chain(ctx)
  ctx[:chain] = ctx[:instrument].option_chain(expiry: ctx[:expiry])
  ctx
end

#get_spot_price(ctx) ⇒ Object 



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# File 'lib/DhanHQ/skills/builtin/buy_atm_call.rb', line 41

def get_spot_price(ctx)
  ctx[:spot_price] = ctx[:instrument].ltp
  ctx
end

#prepare_intent(ctx) ⇒ Object 



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# File 'lib/DhanHQ/skills/builtin/buy_atm_call.rb', line 65

def prepare_intent(ctx)
  ctx[:intent] = {
    trade_type: "OPTIONS_BUY",
    instrument: "#{ctx[:symbol]} #{ctx[:strike]} CE",
    security_id: ctx[:security_id],
    strike: ctx[:strike],
    expiry: ctx[:expiry],
    option_type: "CE",
    quantity: ctx[:quantity],
    premium: ctx[:premium],
    stop_loss: ctx[:stop_loss],
    target: ctx[:target],
    note: "Prepared ATM call buy. Await human confirmation."
  }
  ctx
end

#select_atm_strike(ctx) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/DhanHQ/skills/builtin/buy_atm_call.rb', line 51

def select_atm_strike(ctx)
  spot = ctx[:spot_price]
  chain = ctx[:chain]

  atm = nearest_strike(chain, spot)
  raise ArgumentError, "Could not find ATM strike" unless atm

  ctx[:selected_option] = atm
  ctx[:security_id] = leg_security_id(atm, "CE")
  ctx[:strike] = atm[:strike]
  ctx[:premium] = leg_premium(atm, "CE")
  ctx
end