ransom_interaction_effect

ransom_interaction_effect = {
	# For mass actions where an option is not selected manually
	if = {
		limit = {
			NOR = {
				scope:influence_send_option = yes
				scope:herd_send_option = yes
				scope:current_herd = yes
				scope:extortionate_current_gold = yes
				scope:extortionate_gold = yes
				scope:gold = yes
				scope:current_gold = yes
				scope:favor = yes
				scope:hook ?= yes
			}
			#This should not trigger if you're manually ransoming yourself
			exists = scope:payer
		}
		save_scope_value_as = {
			name = ransom_saved_gold_value
			value = scope:payer.current_gold_value
		}
		if = {
			limit = {
				scope:imprisoner.dynasty ?= { has_dynasty_perk = fp1_pillage_legacy_3 }
				scope:payer.gold >= scope:prisoner.increased_ransom_cost_value
			}
			save_scope_value_as = { name = extortionate_gold value = yes }
		}
		else_if = {
			limit = {
				scope:imprisoner.dynasty ?= { has_dynasty_perk = fp1_pillage_legacy_3 }
				scope:payer.gold < scope:prisoner.increased_ransom_cost_value
				scope:payer.gold >= 1
			}
			save_scope_value_as = { name = extortionate_current_gold value = yes }
		}
		else_if = {
			limit = { scope:payer.gold >= scope:prisoner.normal_ransom_cost_value }
			save_scope_value_as = { name = gold value = yes }
		}
		else_if = {
			limit = {
				scope:payer.gold < scope:prisoner.normal_ransom_cost_value
				scope:payer.gold >= 1
			}
			save_scope_value_as = { name = current_gold value = yes }
		}
		else = {
			save_scope_value_as = { name = favor value = yes }
		}
	}
	scope:prisoner = {
		add_character_flag = { #To make sure you don't get spammed about the release
			flag = block_for_prison_release_notification
			days = 1
		}
		if = { # no opinion if you ransomed yourself
			limit = { this != scope:payer }
			if = { #Only visible if a player is involved
				limit = {
					scope:payer = { is_ai = no }
					scope:prisoner = { is_ai = yes }
				}
				add_opinion = {
					modifier = ransomed_from_prison
					target = scope:payer
					years = 1
				}
				if = {
					limit = {
						is_ai = yes
						ai_honor >= 25
						ai_greed <= 0
					}
					scope:payer = {
						if = {
							limit = {
								can_add_hook = {
									target = scope:prisoner 
									type = favor_hook
								}
							}
							add_hook = {
								target = scope:prisoner 
								type = indebted_hook
							}
						}
					}
				}
				else = {
					scope:payer = {
						progress_towards_hook_effect = {
							CHARACTER = scope:prisoner
							HOOK_TYPE = indebted_hook
						}
					}
				}
			}
			else = {
				hidden_effect = {
					if = {
						limit = {
							is_ai = yes
							ai_honor >= 25
							ai_greed <= 0
						}
						scope:payer = {
							if = {
								limit = {
									can_add_hook = {
										target = scope:prisoner 
										type = favor_hook
									}
								}
								add_hook = {
									target = scope:prisoner 
									type = indebted_hook
								}
							}

As written in game/common/scripted_effects/00_prison_effects.txt.