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name: jb-query description: Query Juicebox V5 project state from the blockchain. Read project configurations, rulesets, terminal balances, token holder data, and splits using cast or ethers.js. Supports mainnet and testnets.

Juicebox V5 Chain Queries

Query on-chain state for Juicebox V5 projects.

Quick Reference - Contract Functions

JBProjects (ERC-721)

count() → uint256                    // Total projects created
ownerOf(projectId) → address         // Project owner
tokenURI(projectId) → string         // Project metadata URI

JBDirectory

controllerOf(projectId) → address              // Project's controller (CRITICAL for version detection!)
terminalsOf(projectId) → IJBTerminal[]         // All terminals
primaryTerminalOf(projectId, token) → address  // Primary terminal for token
isTerminalOf(projectId, terminal) → bool       // Check terminal validity

IMPORTANT: controllerOf() is the ONLY authoritative way to determine which contract version a project uses. Compare the returned address against known V5/V5.1 controller addresses:

• V5.0: 0x27da30646502e2f642be5281322ae8c394f7668a
• V5.1: 0xf3cc99b11bd73a2e3b8815fb85fe0381b29987e1

Some non-revnet projects use V5.0 contracts. Never assume version based on ownership.

JBController

currentRulesetOf(projectId) → (JBRuleset, JBRulesetMetadata)
getRulesetOf(projectId, rulesetId) → (JBRuleset, JBRulesetMetadata)
upcomingRulesetOf(projectId) → (JBRuleset, JBRulesetMetadata)
latestQueuedRulesetOf(projectId) → (JBRuleset, JBRulesetMetadata, approvalStatus)
totalTokenSupplyWithReservedTokensOf(projectId) → uint256
pendingReservedTokenBalanceOf(projectId) → uint256

JBTokens

tokenOf(projectId) → address         // ERC-20 token address
totalBalanceOf(holder, projectId) → uint256   // Holder's token balance
totalCreditSupplyOf(projectId) → uint256      // Unclaimed credits

JBMultiTerminal

currentSurplusOf(projectId, accountingContexts, decimals, currency) → uint256

JBSplits

splitsOf(projectId, rulesetId, groupId) → JBSplit[]

JBFundAccessLimits

payoutLimitOf(projectId, rulesetId, terminal, token, currency) → uint256
usedPayoutLimitOf(projectId, terminal, token, rulesetCycleNumber) → uint256
surplusAllowanceOf(projectId, rulesetId, terminal, token, currency) → uint256
usedSurplusAllowanceOf(projectId, terminal, token, rulesetId) → uint256

Cast Commands (Foundry)

Get Project Owner

cast call $JB_PROJECTS "ownerOf(uint256)(address)" $PROJECT_ID --rpc-url $RPC_URL

Get Current Ruleset

cast call $JB_CONTROLLER "currentRulesetOf(uint256)" $PROJECT_ID --rpc-url $RPC_URL

Get Project Token

cast call $JB_TOKENS "tokenOf(uint256)(address)" $PROJECT_ID --rpc-url $RPC_URL

Get Terminal Balance

cast call $JB_TERMINAL "currentSurplusOf(uint256,address[],uint256,uint256)" \
    $PROJECT_ID \
    "[$NATIVE_TOKEN]" \
    18 \
    $NATIVE_TOKEN \
    --rpc-url $RPC_URL

Get Splits

# Reserved token splits (groupId = 1, JBSplitGroupIds.RESERVED_TOKENS)
cast call $JB_SPLITS "splitsOf(uint256,uint256,uint256)" \
    $PROJECT_ID $RULESET_ID 1 \
    --rpc-url $RPC_URL

# Payout splits - groupId = uint256(uint160(token))
# For ETH payouts: groupId = uint256(uint160(0x000000000000000000000000000000000000EEEe))
# The payout split group is derived from the token address being paid out
NATIVE_TOKEN="0x000000000000000000000000000000000000EEEe"
ETH_PAYOUT_GROUP=$(cast --to-uint256 $NATIVE_TOKEN)
cast call $JB_SPLITS "splitsOf(uint256,uint256,uint256)" \
    $PROJECT_ID $RULESET_ID $ETH_PAYOUT_GROUP \
    --rpc-url $RPC_URL

# For USDC payouts (example on mainnet):
USDC_ADDRESS="0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
USDC_PAYOUT_GROUP=$(cast --to-uint256 $USDC_ADDRESS)
cast call $JB_SPLITS "splitsOf(uint256,uint256,uint256)" \
    $PROJECT_ID $RULESET_ID $USDC_PAYOUT_GROUP \
    --rpc-url $RPC_URL

Get Token Balance

cast call $JB_TOKENS "totalBalanceOf(address,uint256)(uint256)" \
    $HOLDER_ADDRESS $PROJECT_ID \
    --rpc-url $RPC_URL

TypeScript Examples (ethers.js)

Setup

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider(process.env.RPC_URL);

// Contract ABIs (simplified)
const PROJECTS_ABI = ['function ownerOf(uint256) view returns (address)'];
const CONTROLLER_ABI = ['function currentRulesetOf(uint256) view returns (tuple, tuple)'];
const TOKENS_ABI = ['function tokenOf(uint256) view returns (address)'];

const projects = new ethers.Contract(JB_PROJECTS, PROJECTS_ABI, provider);
const controller = new ethers.Contract(JB_CONTROLLER, CONTROLLER_ABI, provider);
const tokens = new ethers.Contract(JB_TOKENS, TOKENS_ABI, provider);

Query Project Info

async function getProjectInfo(projectId: number) {
    const owner = await projects.ownerOf(projectId);
    const [ruleset, metadata] = await controller.currentRulesetOf(projectId);
    const tokenAddress = await tokens.tokenOf(projectId);

    return {
        owner,
        ruleset: {
            cycleNumber: ruleset.cycleNumber,
            weight: ruleset.weight,
            duration: ruleset.duration,
        },
        metadata: {
            reservedRate: metadata.reservedRate,
            cashOutTaxRate: metadata.cashOutTaxRate,
            dataHook: metadata.dataHook,
        },
        tokenAddress,
    };
}

Query Token Holders

async function getTokenBalance(holder: string, projectId: number) {
    const balance = await tokens.totalBalanceOf(holder, projectId);
    return ethers.formatEther(balance);
}

Common Queries

"Which contract version does project X use?"

ALWAYS start here before making any other queries that involve versioned contracts.

# Check JBDirectory.controllerOf() - the authoritative source
cast call 0x0061e516886a0540f63157f112c0588ee0651dcf \
  "controllerOf(uint256)(address)" $PROJECT_ID --rpc-url $RPC_URL

# V5.0 controller: 0x27da30646502e2f642be5281322ae8c394f7668a
# V5.1 controller: 0xf3cc99b11bd73a2e3b8815fb85fe0381b29987e1

Then use the matching versioned contracts (terminal, rulesets, etc.) for all subsequent queries.

"What's the current state of project X?"

1. First: Get controller version via JBDirectory.controllerOf(projectId) - determines which contracts to use
2. Get owner: JBProjects.ownerOf(projectId)
3. Get ruleset: Use correct versioned JBController.currentRulesetOf(projectId)
4. Get token: JBTokens.tokenOf(projectId)
5. Get terminals: JBDirectory.terminalsOf(projectId)
6. Get surplus: Use correct versioned JBMultiTerminal.currentSurplusOf(...)

"Who are the split recipients?"

1. Get current ruleset ID from currentRulesetOf
2. Query reserved splits: JBSplits.splitsOf(projectId, rulesetId, 1) (group 1 = RESERVED_TOKENS)
3. Query payout splits: JBSplits.splitsOf(projectId, rulesetId, uint256(uint160(token)))
   • For native token (ETH): group = uint256(uint160(JBConstants.NATIVE_TOKEN))
   • For USDC: group = uint256(uint160(USDC_ADDRESS))

"How much can be paid out?"

1. Get payout limit: JBFundAccessLimits.payoutLimitOf(...)
2. Get used amount: JBFundAccessLimits.usedPayoutLimitOf(...)
3. Remaining = limit - used

"What hooks are configured?"

1. Get ruleset metadata from currentRulesetOf
2. Check useDataHookForPay and useDataHookForCashOut
3. Get hook address from dataHook

Network RPC URLs

Network	RPC URL
Ethereum	https://eth.llamarpc.com
Sepolia	https://rpc.sepolia.org
Optimism	https://mainnet.optimism.io
Arbitrum	https://arb1.arbitrum.io/rpc
Base	https://mainnet.base.org

Generation Guidelines

1. Identify the data needed from user's question
2. Determine which contracts to query
3. Provide cast commands for quick CLI queries
4. Provide TypeScript for programmatic access
5. Use the /jb-docs skill to get current contract addresses

Example Prompts

• "What's the current ruleset for project 123?"
• "Who owns project 456?"
• "How much surplus does project 789 have?"
• "List all payout splits for project 42"
• "What's my token balance in project 100?"