diff --git a/packages/core/package.json b/packages/core/package.json
index f13f2ec..f489a1e 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "juice-sdk-core",
-  "version": "10.0.0-alpha",
+  "version": "10.0.1-alpha",
   "type": "module",
   "scripts": {
     "generate": "wagmi generate",
diff --git a/packages/core/src/constants.ts b/packages/core/src/constants.ts
index c047029..f14bd9f 100644
--- a/packages/core/src/constants.ts
+++ b/packages/core/src/constants.ts
@@ -22,31 +22,31 @@ export const DEFAULT_ALLOW_OVERSPENDING = true;
  *
  * @link JBConstants.sol
  */
-export const MAX_RESERVED_PERCENT = 10_000n;
+export const MAX_RESERVED_PERCENT = 10_000;
 
 /**
  * The maximum value for a ruleset's Redemption Rate.
  *
  * @link JBConstants.sol
  */
-export const MAX_REDEMPTION_RATE = 10_000n;
+export const MAX_REDEMPTION_RATE = 10_000;
 
 /**
  * The maximum value for a ruleset's Decay Rate.
  *
  * @link JBConstants.sol
  */
-export const MAX_DECAY_PERCENT = 1_000_000_000n;
+export const MAX_DECAY_PERCENT = 1_000_000_000;
 
 /**
  * @link JBConstants.sol
  */
-export const MAX_FEE = 1_000_000_000n;
+export const MAX_FEE = 1_000_000_000;
 
 /**
  * @link JBConstants.sol
  */
-export const MAX_FEE_DISCOUNT = 1_000_000_000n;
+export const MAX_FEE_DISCOUNT = 1_000_000_000;
 
 /**
  * The 100% representation for a ruleset's Splits.
@@ -55,7 +55,7 @@ export const MAX_FEE_DISCOUNT = 1_000_000_000n;
  *
  * @link JBConstants.sol
  */
-export const SPLITS_TOTAL_PERCENT = 1_000_000_000n;
+export const SPLITS_TOTAL_PERCENT = 1_000_000_000;
 
 /**
  * The number of decimals that the internal JB Token has.
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index 7f78fd5..6e29b39 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -1,10 +1,11 @@
-import { Address, ContractFunctionReturnType } from "viem";
-import { jbControllerAbi } from "./generated/juicebox.js";
+import { ContractFunctionReturnType } from "viem";
+import { jbControllerAbi, jbSplitsAbi } from "./generated/juicebox.js";
 import {
   DecayPercent,
   RedemptionRate,
   ReservedPercent,
   RulesetWeight,
+  SplitPortion,
 } from "./utils/data.js";
 
 export const projectTagOptions = [
@@ -87,54 +88,10 @@ export type JBProjectMetadata = {
   softTargetCurrency: string;
 }>;
 
-/**
- * A split of a project's payout funds to a beneficiary, project or allocator.
- *
- * @type
- */
-export type JBSplit = {
-  /**
-   * The address of the beneficiary.
-   */
-  beneficiary: Address;
-  /**
-   * The percentage of funds to send to the beneficiary.
-   */
-  percent: number;
-  /**
-   * TODO: What is preferClaimed?
-   */
-  preferClaimed: boolean;
-  /**
-   * The timestamp at which the split is locked until and cannot be changed.
-   */
-  lockedUntil: number;
-  /**
-   * The ID of the project that is acting as the beneficiary.
-   */
-  projectId: bigint;
-  /**
-   * The address of the allocator contract.
-   *
-   * If an allocator is specified, funds will be sent to the allocator contract
-   * along with the projectId, beneficiary, preferClaimed properties.
-   */
-  allocator: Address;
-};
-
-/**
- * Splits as they are given to transactions such as reconfigureRulesetsOf
- *
- * Used when interpreting data from Gnosis Safe transactions
- */
-export type JBSplitParams = {
-  beneficiary: Address;
-  percent: bigint;
-  preferClaimed: boolean;
-  lockedUntil: number;
-  projectId: bigint;
-  allocator: Address;
-};
+export type JBSplit = Omit<
+  ContractFunctionReturnType<typeof jbSplitsAbi, "view", "splitsOf">[number],
+  "percent"
+> & { percent: SplitPortion };
 
 /**
  * The type of split.
diff --git a/packages/core/src/utils/data.test.ts b/packages/core/src/utils/data.test.ts
index aaf6729..87b319f 100644
--- a/packages/core/src/utils/data.test.ts
+++ b/packages/core/src/utils/data.test.ts
@@ -3,7 +3,7 @@ import { DecayPercent, ReservedPercent } from "./data.js";
 
 describe("jb", () => {
   test("reserved rate", () => {
-    const reservedPercentRaw = 2_345n; // 23.45%
+    const reservedPercentRaw = 2_345; // 23.45%
     const reservedPercent: ReservedPercent = new ReservedPercent(reservedPercentRaw);
     expect(reservedPercent.format()).toEqual("0.2345");
     expect(reservedPercent.toFloat()).toEqual(0.2345);
@@ -15,7 +15,7 @@ describe("jb", () => {
   });
 
   test("decay rate", () => {
-    const decayPercentRaw = 200_000_000n; // 20%
+    const decayPercentRaw = 200_000_000; // 20%
     const decayPercent = new DecayPercent(decayPercentRaw);
     expect(decayPercent.format()).toEqual("0.2");
     expect(decayPercent.toFloat()).toEqual(0.2);
diff --git a/packages/core/src/utils/data.ts b/packages/core/src/utils/data.ts
index 2b6c4f4..33f3da4 100644
--- a/packages/core/src/utils/data.ts
+++ b/packages/core/src/utils/data.ts
@@ -14,8 +14,8 @@ import {
  * @extends FixedPortion
  */
 export class ReservedPercent extends FixedPortion<4> {
-  constructor(value: bigint) {
-    super(value, 4, MAX_RESERVED_PERCENT);
+  constructor(value: number) {
+    super(BigInt(value), 4, BigInt(MAX_RESERVED_PERCENT));
   }
 }
 
@@ -27,8 +27,8 @@ export class ReservedPercent extends FixedPortion<4> {
  * @extends FixedPortion
  */
 export class RedemptionRate extends FixedPortion<4> {
-  constructor(value: bigint) {
-    super(value, 4, MAX_REDEMPTION_RATE);
+  constructor(value: number) {
+    super(BigInt(value), 4, BigInt(MAX_REDEMPTION_RATE));
   }
 }
 
@@ -40,14 +40,14 @@ export class RedemptionRate extends FixedPortion<4> {
  * @extends FixedPortion
  */
 export class DecayPercent extends FixedPortion<9> {
-  constructor(value: bigint) {
-    super(value, 9, MAX_DECAY_PERCENT);
+  constructor(value: number) {
+    super(BigInt(value), 9, BigInt(MAX_DECAY_PERCENT));
   }
 }
 
 export class SplitPortion extends FixedPortion<9> {
   constructor(value: bigint) {
-    super(value, 9, SPLITS_TOTAL_PERCENT);
+    super(BigInt(value), 9, BigInt(SPLITS_TOTAL_PERCENT));
   }
 }
 
diff --git a/packages/core/src/utils/ruleset.ts b/packages/core/src/utils/ruleset.ts
index e5d7820..379a9d0 100644
--- a/packages/core/src/utils/ruleset.ts
+++ b/packages/core/src/utils/ruleset.ts
@@ -8,11 +8,12 @@ import { MAX_DECAY_PERCENT } from "../constants.js";
  */
 export function getNextRulesetWeight(currentRuleset: {
   weight: bigint;
-  decayPercent: bigint;
+  decayPercent: number;
 }) {
   const nextRulesetWeight =
-    (currentRuleset.weight * (MAX_DECAY_PERCENT - currentRuleset.decayPercent)) /
-    MAX_DECAY_PERCENT;
+    (currentRuleset.weight *
+      BigInt(MAX_DECAY_PERCENT - currentRuleset.decayPercent)) /
+    BigInt(MAX_DECAY_PERCENT);
 
   return nextRulesetWeight;
 }
@@ -22,12 +23,12 @@ export function getNextRulesetWeight(currentRuleset: {
  */
 export function getPrevRulesetWeight(currentRuleset: {
   weight: bigint;
-  decayPercent: bigint;
+  decayPercent: number;
 }) {
   // reverse of getNextRulesetWeight
   const prevRulesetWeight =
-    (currentRuleset.weight * MAX_DECAY_PERCENT) /
-    (MAX_DECAY_PERCENT - currentRuleset.decayPercent);
+    (currentRuleset.weight * BigInt(MAX_DECAY_PERCENT)) /
+    BigInt(MAX_DECAY_PERCENT - currentRuleset.decayPercent);
 
   return prevRulesetWeight;
 }
diff --git a/packages/core/src/utils/token.test.ts b/packages/core/src/utils/token.test.ts
index 996e9a3..4972cdd 100644
--- a/packages/core/src/utils/token.test.ts
+++ b/packages/core/src/utils/token.test.ts
@@ -14,7 +14,7 @@ describe("token", () => {
       "should return the correct token B quote when amount is $tokenAAmount and decimals is $tokenADecimals",
       ({ tokenAAmount, tokenADecimals, expectedPayerTokens }) => {
         const weight = FixedInt.parse<18>("1", 18); // 1 token per USDC
-        const reservedPercent = new ReservedPercent(0n);
+        const reservedPercent = new ReservedPercent(0);
         const { payerTokens } = getTokenAToBQuote(
           new FixedInt(tokenAAmount, tokenADecimals),
           {
@@ -36,7 +36,7 @@ describe("token", () => {
     `(
       "should return the correct token A quote when amount is $tokenBAmount and decimals is $tokenADecimals",
       ({ tokenADecimals, expectedTokenBPrice, weight }) => {
-        const reservedPercent = new ReservedPercent(0n);
+        const reservedPercent = new ReservedPercent(0);
         const tokenBPrice = getTokenBPrice(tokenADecimals, {
           weight,
           reservedPercent,
diff --git a/packages/core/src/utils/token.ts b/packages/core/src/utils/token.ts
index 457b11f..ceae81e 100644
--- a/packages/core/src/utils/token.ts
+++ b/packages/core/src/utils/token.ts
@@ -30,7 +30,7 @@ export const getTokenAToBQuote = <D extends number>(
   const totalTokens = (weight.value * tokenAAmount.value) / weightRatio;
   const reservedTokens =
     (weight.value * reservedPercent.value * tokenAAmount.value) /
-    MAX_RESERVED_PERCENT /
+    BigInt(MAX_RESERVED_PERCENT) /
     weightRatio;
 
   const payerTokens = totalTokens - reservedTokens;
@@ -109,7 +109,7 @@ export const getTokenRedemptionQuoteEth = (
   }: {
     overflowWei: bigint;
     totalSupply: bigint;
-    redemptionRate: bigint;
+    redemptionRate: number;
     tokensReserved: bigint;
   }
 ) => {
@@ -122,12 +122,12 @@ export const getTokenRedemptionQuoteEth = (
   if (redemptionRate === MAX_REDEMPTION_RATE) return base;
 
   const frac =
-    (tokensAmount * (MAX_REDEMPTION_RATE - redemptionRate)) / realTotalSupply;
+    (tokensAmount * BigInt(MAX_REDEMPTION_RATE - redemptionRate)) / realTotalSupply;
 
   // numerator = r + (x(1 - r)/s)
-  const numerator = redemptionRate + frac;
+  const numerator = BigInt(redemptionRate) + frac;
   // y = base * numerator ==> ox/s * ( r + (x(1 - r)/s) )
-  const y = (base * numerator) / MAX_REDEMPTION_RATE;
+  const y = (base * numerator) / BigInt(MAX_REDEMPTION_RATE);
 
   return y / 10n;
 };
diff --git a/packages/react/package.json b/packages/react/package.json
index a7422d6..81f9054 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "juice-sdk-react",
-  "version": "10.0.0-alpha",
+  "version": "10.0.1-alpha",
   "description": "Wagmi hooks for Juicebox V4",
   "type": "module",
   "scripts": {
diff --git a/packages/react/src/contexts/JBRulesetContext/JBRulesetContext.tsx b/packages/react/src/contexts/JBRulesetContext/JBRulesetContext.tsx
index 513dd07..2c16ceb 100644
--- a/packages/react/src/contexts/JBRulesetContext/JBRulesetContext.tsx
+++ b/packages/react/src/contexts/JBRulesetContext/JBRulesetContext.tsx
@@ -100,12 +100,12 @@ export const JBRulesetProvider = ({
           data: {
             ...ruleset,
             weight: new RulesetWeight(ruleset.weight),
-            decayPercent: new DecayPercent(BigInt(ruleset.decayPercent)),
+            decayPercent: new DecayPercent(ruleset.decayPercent),
           },
           metadata: {
             ...rulesetMetadata,
-            redemptionRate: new RedemptionRate(BigInt(rulesetMetadata.redemptionRate)),
-            reservedPercent: new ReservedPercent(BigInt(rulesetMetadata.reservedPercent))
+            redemptionRate: new RedemptionRate(rulesetMetadata.redemptionRate),
+            reservedPercent: new ReservedPercent(rulesetMetadata.reservedPercent)
           },
         };
       },