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9c07cbe7f6
In this commit, we land exp-021's instrument: two flag-gated changes to lnd's own payment stack, byte-identical to stock with both flags off (proven against a pre-change binary across four tiers). soft_unknown is the live half. An unreadable failure now penalizes exactly one pair (the lowest-probability hop at the attempt amount) instead of every pair of the route in both directions, which is the mechanism exp-019 showed spiraling lnd into give-ups from a 10% unreadable-error rate. The smoke shows the intended signature: with the flag on, lnd's trajectory is invariant to the unreadable rate. adaptive_split is the measured negative, kept as instrumentation. Three designs were built and each reduced to the same thing: descend geometrically from the learned bound, which lnd's blind halving already does at the fastest ratio of any variant, for free. The supremum search paid a wire attempt per linear step; the backoff variant re-derived halving with a slower constant; the expected-value ladder degenerates to its top rung under apriori's flat belief and cannot escape the retry loop bimodal pins itself into. The conclusion the writeup carries: the reactive split-retry control flow is not where the evolved routers' edge lives, so the distillation question moves to plan-time mechanisms.
21 lines
422 B
JSON
21 lines
422 B
JSON
{
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"estimator": "apriori",
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"apriori": {
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"penalty_half_life_sec": 3600,
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"hop_probability": 0.6,
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"weight": 0.5,
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"capacity_fraction": 0.9999
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},
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"bimodal": {
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"scale_msat": 300000000,
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"node_weight": 0.2,
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"decay_time_sec": 604800
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},
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"attempt_cost_msat": 100000,
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"attempt_cost_ppm": 1000,
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"min_probability": 0.01,
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"patch": {
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"adaptive_split": true,
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"soft_unknown": true
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}
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}
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