Printr Launchpad Integration on Robinhood Chain

Learn how to index and integrate the Printr launchpad on Robinhood Chain, including contract discovery, ABI events, token pricing, liquidity, bonding state, graduation, and metadata. Integrate Printr multi-chain Telecoin bonding curves, trades, graduation, and metadata. This guide describes the public contract surface for an independent integration.

Protocol reference: https://printr.fun

Network and contracts

Unless another chain is listed, these addresses are for Robinhood Chain (chainId 4663). Verify proxy implementations and mutable configuration at the indexed block.

Role	Address
Printr protocol	`0xb77726291b125515d0a7affeea2b04f2ff243172`
Public launch token	`0x0bc0ce5c9e36c0ec914b2b6643f8b0f1a1b77777`

Market discovery and ABI

A Telecoin may have one curve per chain. Use CurveCreated to bind the token to telecoinId, base pair, virtual reserve, maximum supply, number of curves, and completion threshold. The token address is the curve identity on that chain.

Relevant ABI

event CurveCreated(bytes32 indexed telecoinId,address indexed token,address basePair,uint256 maxTokenSupply,uint256 totalCurves,uint256 virtualReserve,uint256 completionThreshold);
event TokenTrade(bytes32 indexed telecoinId,address indexed token,address indexed trader,bool isBuy,uint256 tokenAmount,uint256 baseAmount,uint256 effectivePrice,uint256 issuedSupply,uint256 reserve);
event LiquidityDeployed(bytes32 indexed telecoinId,address indexed token,address pool,uint256 tokenAmount,uint256 baseAmount);
event TokenGraduated(bytes32 indexed telecoinId,address indexed token);
function getCurve(address token) view returns (address basePair,uint256 totalCurves,uint256 maxTokenSupply,uint256 virtualReserve,uint256 reserve,uint256 completionThreshold);
function getTelecoinId(address token) view returns (bytes32);
function treasury() view returns (address);

Launchpad architecture and AMM model

Printr is a multi-chain token launchpad whose active launch phase uses a protocol-specific bonding curve rather than Uniswap v3 or v4. Printr adds Telecoin identity, cross-chain supply allocation, curve trading, graduation, and later deployment of liquidity to an external AMM. Classification: custom multi-chain bonding curve; not V3- or V4-like while active. Pricing uses virtual quote reserve, real reserve, remaining curve inventory, issued supply, and a completion threshold. A later LiquidityDeployed event names the destination market, whose AMM type must be detected independently. Shared with Uniswap-style AMMs: deterministic reserve-dependent pricing and explicit token/quote trade amounts. Different from V3/V4: no tick, sqrtPriceX96, PoolKey, or concentrated-liquidity state on the curve; Telecoin supply and progress are distributed across multiple chains.

Price calculation

For a trade, effectivePrice is the authoritative execution/current price with 18-decimal scaling. For a snapshot, let issued = completionThreshold - treasuryTokenBalance and remaining = completionThreshold - issued; then spot price is (virtualReserve + reserve) / remaining, with base/token decimals applied.

Liquidity tracking

The active curve quote liquidity is reserve; the virtual component is virtualReserve. Remaining curve inventory comes from treasury token balance. After LiquidityDeployed, track the emitted destination pool independently and do not count virtual reserve as withdrawable liquidity.

Launchpad state, bonding, and migration

A zero completionThreshold indicates graduation. For an active multi-chain curve let M = maxTokenSupply / totalCurves, G = completionThreshold × 10,000 / M, and R = reserve, V = virtualReserve. Progress in basis points is R × (10,000-G) × 10,000 / (V × G); divide by 100 for percent and clamp to [0,100]. LiquidityDeployed or TokenGraduated is authoritative completion.

Metadata

Resolve the Telecoin ID, then fetch its metaURI/protocol metadata. Expected fields include name, symbol, description, image, and external links (website, X/Twitter, Telegram). Use ERC-20 metadata as fallback and keep the Telecoin ID for cross-chain grouping.

Indexing checklist

Index creation and bind the launched token to its canonical market.
Preserve on-chain token/currency order exactly.
Replay logs in block, transaction, and log-index order.
Keep raw integers until decimals are applied.
Treat graduation as protocol state, not a generic price shortcut.

Historical indexing notes

Use block-scoped reads when initializing historical state. Do not mix latest reads into an old-block replay. Store launched-token identity separately from native pool ordering.

For broader methodology, see Bonding Curves Mathematics and Pricing Engine Deep Dive.

Memecoin

Spot Markets

Robinhood

How to Integrate Printr on Robinhood Chain

Printr Launchpad Integration on Robinhood Chain

Network and contracts

Market discovery and ABI

Relevant ABI

Launchpad architecture and AMM model

Price calculation

Liquidity tracking

Launchpad state, bonding, and migration

Metadata

Indexing checklist

Historical indexing notes

​Printr Launchpad Integration on Robinhood Chain

​Network and contracts

​Market discovery and ABI

​Relevant ABI

​Launchpad architecture and AMM model

​Price calculation

​Liquidity tracking

​Launchpad state, bonding, and migration

​Metadata

​Indexing checklist

​Historical indexing notes

​Related Robinhood Chain launchpad integrations

Printr Launchpad Integration on Robinhood Chain

Network and contracts

Market discovery and ABI

Relevant ABI

Launchpad architecture and AMM model

Price calculation

Liquidity tracking

Launchpad state, bonding, and migration

Metadata

Indexing checklist

Historical indexing notes

Related Robinhood Chain launchpad integrations