LaunchLab curve rules

GlobalConfig       protocol floor      "supply >= 10M, sell rate >= 20%, ..."
  └─ PlatformCurveRule   your rule     "and on my platform: one of these shapes"
       └─ check group    one shape     "supply = 1B AND fund raising in [80, 90] SOL"
            └─ constraint one check    "(Supply, Eq, 1_000_000_000)"

pub struct ParamConstraint {
    pub field: u8,    // which launch parameter, see the table below
    pub op:    u8,    // 0 Eq, 1 Gte (min), 2 Lte (max), 3 Neq
    pub value: u128,
}

import {
  checkLaunchAgainstCurveRule,
  getPdaPlatformCurveRule,
  LaunchpadCurveRuleBaseTokenProgram,
  LaunchpadCurveRuleField,
  PlatformCurveRule,
} from "@raydium-io/raydium-sdk-v2";
import BN from "bn.js";

const platformConfig = await raydium.launchpad.getPlatformConfig(platformConfigId);

// at 0 the program does not read rules at all, so there is nothing to check
if (platformConfig.restrictCurveParam !== 0) {
  const ruleId = getPdaPlatformCurveRule(programId, platformConfigId, configId).publicKey;
  const ruleAccount = await connection.getAccountInfo(ruleId);

  const result = checkLaunchAgainstCurveRule({
    // undefined when the account does not exist — the platform wrote no rule for this config
    rule: ruleAccount === null ? undefined : PlatformCurveRule.decode(ruleAccount.data),
    context: {
      curveType: globalConfig.curveType,
      migrateType: 1,
      migrateCpmmFeeOn: 0,
      supply: new BN("1000000000000000"),
      totalSellA: new BN("793100000000000"),
      totalFundRaisingB: new BN("85000000000"),
      totalLockedAmount: new BN(0),
      cliffPeriod: new BN(0),
      unlockPeriod: new BN(0),
      baseTokenProgram: LaunchpadCurveRuleBaseTokenProgram.SplToken,
      // omit transferFee entirely when the base mint carries no transfer-fee extension
      unixTimestamp: new BN(Math.floor(Date.now() / 1000)),
    },
  });

  if (!result.ok) {
    // every group rejected the launch; each entry lists all of that group's failing constraints
    for (const group of result.groupFailures) {
      for (const c of group.unsatisfied) {
        console.log(
          `group ${group.groupId}: ${LaunchpadCurveRuleField[c.field]} is ${c.actual ?? "not computable"},`,
          `rule wants op ${c.op} ${c.value.toString()}`,
        );
      }
    }
  }
}

import {
  checkCurveRuleGroupWritable,
  LaunchpadCurveRuleField,
  LaunchpadCurveRuleOp,
} from "@raydium-io/raydium-sdk-v2";

const constraints = [
  { field: LaunchpadCurveRuleField.Supply, op: LaunchpadCurveRuleOp.Eq, value: new BN("1000000000000000") },
  { field: LaunchpadCurveRuleField.TotalFundRaisingB, op: LaunchpadCurveRuleOp.Gte, value: new BN("50000000000") },
  { field: LaunchpadCurveRuleField.TotalFundRaisingB, op: LaunchpadCurveRuleOp.Lte, value: new BN("200000000000") },
];

const writable = checkCurveRuleGroupWritable({
  groupId: 0,
  constraints,
  curveType: globalConfig.curveType,
  // the ids the rule already holds, so replacing a group is not mistaken for adding one
  existingGroupIds: existingRule?.groups.map((g) => g.groupId) ?? [],
});

// each error carries the program error code the transaction would have failed with
if (!writable.ok) console.log(writable.errors);