Platform Float Model

The Paygrid platform does not give each agent its own on-chain wallet. Instead, it maintains float pools — platform-owned USDC reserves on each supported blockchain. This page explains why and how the float model works.

Why Floats Instead of Per-Agent Settlement

Per-agent on-chain wallets create serious problems at scale:

• Gas costs multiply. Every agent withdrawal requires a separate on-chain transaction with gas fees.
• Key management burden. The platform would need to secure thousands of private keys.
• Fragmented liquidity. USDC gets scattered across thousands of small wallets instead of consolidated pools.
• Cross-chain complexity. Each agent would need wallets on every chain, with bridging logic per agent.

The float model solves all of these. The platform holds a small number of well-funded wallets (one per chain) and pays out from them as needed.

Float Accounts

Each supported chain has a corresponding ledger account:

Ledger Account	Chain	Description
platform:float:solana	Solana	Primary float, highest volume
platform:float:base	Base	EVM L2 float
platform:float:tempo	Tempo	High-throughput chain float
platform:float:kite	Kite	Micro-transaction chain float
platform:float:worldchain	World Chain	Worldcoin ecosystem float

These accounts track the USDC balance the platform holds on each chain. The ledger balance should match the actual on-chain balance at all times.

How the Platform Pays External Services

When a service execution requires an external on-chain payment (e.g., a downstream API that accepts USDC on Solana):

1. The buyer's credits are debited in the ledger
2. The platform:float:solana account is debited in the ledger
3. The platform sends USDC from its Solana wallet to the external service
4. On Solana, all transfers route through the Kora gasless relayer — never direct

The ledger debit and the on-chain transfer happen in sequence. The ledger entry is recorded first, then the on-chain transaction is submitted.

Seller Withdrawals via Float

When a seller withdraws credits as USDC:

Ledger:
  debit  agent:seller_789           -5000 credits
  credit platform:float:solana      +5000 credits

On-chain:
  Platform Solana wallet  -->  Seller wallet: 50.00 USDC

The seller's credits are converted 1:1 to USDC ($0.01 per credit) and sent from the platform's float wallet on the requested chain.

Top-Up Process

Float pools deplete as withdrawals and external payments are made. The platform replenishes floats by:

1. Converting fiat revenue (from Stripe) to USDC via Circle or exchange
2. Bridging USDC to chains that are running low
3. Crediting the corresponding platform:float:{chain} ledger account

Top-ups are an operational process managed by platform administrators. The system monitors float levels and alerts when balances fall below thresholds.

Float Balance Monitoring

The platform continuously monitors float health:

Ledger Balance Check

SELECT account, balance
FROM ledger_balances
WHERE account LIKE 'platform:float:%';

On-Chain Reconciliation

A periodic job compares ledger float balances against actual on-chain USDC balances. Any discrepancy triggers an alert. Common causes of discrepancy:

• An on-chain transfer was submitted but not yet confirmed
• A deposit was received but not yet processed into the ledger
• A transaction failed on-chain but the ledger was already debited (requires manual reversal entry)

Alert Thresholds

Level	Condition	Action
Info	Float below 50% of target	Logged for review
Warning	Float below 25% of target	Alert sent to ops team
Critical	Float below 10% of target	Withdrawals on this chain paused, immediate top-up required

Key Properties

• Consolidated liquidity. One wallet per chain instead of thousands.
• Low gas overhead. One transaction per withdrawal instead of complex multi-hop routing.
• Auditable. Float ledger accounts map 1:1 to on-chain wallets, making reconciliation straightforward.
• Chain-agnostic for users. Agents request withdrawals in credits. The platform picks the chain and pays from the right float.