Bring liquidity to Arbitrum without moving the underlying assets. Yamata turns positions held elsewhere into one unified, risk-adjusted Buying Power balance for Arbitrum markets.
Your assets don't need to move to Arbitrum for their value to become useful on Arbitrum.
Onchain capital is increasingly fragmented. A trader may have capital tied up in prediction positions, crypto assets, tokenized securities or other positions across different chains and venues. When another opportunity appears, the normal choices are to sell an existing position, add more capital, or manually borrow, bridge and move funds between protocols.
Yamata turns those existing positions into Buying Power.
Assets can remain where they already live. Yamata values them conservatively, applies a risk-adjusted collateral contribution, and makes that value available through a universal credit account on Arbitrum.
A prediction position on Polygon, an xStock on Solana, or eligible crypto assets can all contribute to the same Buying Power balance. The user can then deploy that Buying Power into Arbitrum markets such as GMX, Uniswap, Aave and Morpho while the underlying collateral remains associated with its source chain.
Arbitrum is not simply another supported network in this architecture. It is the account and execution layer: Buying Power, reservations, debt and reconciliation are controlled by Yamata contracts on Arbitrum.
We have already tested the underlying demand thesis.
Before this Buildathon, Yamata.pm ran a capped production pilot allowing real users to borrow against prediction-market positions they wanted to keep. The 50-seat pilot reached its supply capacity on day one, users borrowed and looped the released capital back into markets, and the pilot completed with zero bad debt.
That experiment taught us two things. First, users do want to keep an existing position while putting part of its value to work elsewhere. Second, they do not want the complexity of a lending product — separate borrowing screens, bridges, gas and protocol management. That is why Yamata now abstracts the mechanism into Buying Power.
For Buildathon Singapore, we built the Arbitrum control plane and proved the full credit lifecycle publicly.
Yamata's TradingPowerLedger, CollateralAttestationRegistry and GMX adapter are deployed on Arbitrum Sepolia, with external collateral originating outside Arbitrum and contributing to the same account.
On Polygon, prediction collateral can be secured and recognized as risk-adjusted Buying Power on Arbitrum. We also added a Solana xStock collateral path, demonstrating how a tokenized stock held on a second source chain can feed into that same universal account rather than requiring a separate balance or credit system.
The public Arbitrum run used real GMX keeper execution for both opening and closing positions. In the credit-funded trade, margin exceeded the account's available cash, so Yamata created real account debt backed by the external collateral contribution. When the position closed, proceeds repaid that debt first before returning the remainder to cash. Source collateral release was blocked while obligations existed and permitted only after repayment.
The implementation has 46 passing automated tests, including 256 conservation-fuzz cases, and the deployed contracts have exact source verification.
The current testnet implementation uses controlled source collateral and centralized attestation/release infrastructure to demonstrate the full Yamata account lifecycle: cross-chain collateral recognition, risk-adjusted Buying Power, credit-funded execution on Arbitrum, debt repayment and collateral release.
The longer-term opportunity is simple: Yamata decouples where assets live from where their value can be used. Polygon prediction positions, Solana tokenized stocks and assets across the wider onchain economy can remain in their native environments while contributing to one usable balance sheet on Arbitrum.