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Multi-Channel Netting (Stratum)

Batch settlements across all channels in one cycle.

AMP channels can opt into multilateral netting through Valeo Stratum. Instead of each channel settling independently, Stratum aggregates all settlements in a netting cycle and produces the minimum set of on-chain transfers.

Why netting matters

Without netting (3 channels, 3 transactions):

  • Agent A owes Service B: $5.00
  • Agent A owes Service C: $3.00
  • Service C owes Agent A: $2.00

With netting (2 transactions):

  • Agent A owes Service B: $5.00
  • Agent A owes Service C: $1.00 ($3 - $2)

At scale (100 agents, 100 services), netting reduces on-chain transactions by 60-80%.

Enabling netting

When opening a channel, set stratum_enabled:

const channel = await amp.openChannel({
  to: serviceB.pubkey,
  deposit: 10.00,
  stratumEnabled: true,
  stratumCycle: 3600,
})

How it works

  1. Metering proofs are submitted to the Stratum netting engine (off-chain)
  2. At each cycle, Stratum calculates net obligations across all opted-in channels
  3. Stratum submits the minimum set of settle instructions
  4. All channels are updated in one cycle

Channel state fields

FieldDescription
stratum_enabledWhether channel opts into netting
stratum_cycleNetting interval in seconds
stratum_authorityStratum engine pubkey (authorized to call settle)

The stratum_authority can call settle on behalf of the recipient, but cannot close channels or modify any other state.

Fallback

If Stratum is unavailable, channels fall back to normal per-channel settlement by the recipient. Netting is an optimization, not a requirement.