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0.2.0

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@0g-brier/protocol

The Dynamic Pari-mutuel Market maths behind Brier, in TypeScript — pricing, quoting, units and deployment manifests.

0gdefidpmparimutuelprediction-market
Published1 Sept 2026
Direct dependencies4
Transitive dependenciesNot calculated

README

Current package documentation

@0g-brier/protocol

The Dynamic Pari-mutuel Market maths behind Brier, in TypeScript. A mirror of the Solidity library, pinned to it by vectors generated from the contracts themselves — a mirror is only worth having if something fails when it drifts.

npm i @0g-brier/protocol

import {dpm, WAD, networkFor} from "@0g-brier/protocol";

const q: readonly [bigint, bigint] = [1000n * WAD, 1200n * WAD]; // [NO, YES]

dpm.probability(q, 1); // 0.590… — P(YES)
dpm.price(q, 1);       // 0.768… — the marginal PRICE per share

Those are different numbers, and confusing them is the mistake this package exists to prevent. The implied probability is pᵢ²; the marginal price is pᵢ. A price shown with a % sign is a lie about the instrument.

A winning share pays 1/pᵢ, funded entirely by the pool — so every later buyer on your side dilutes you, including your own next order. dpm.costUp, sharesForSpend and quote size a trade against that.

Deployment manifests load through the ./node entry point:

import {loadDeployment} from "@0g-brier/protocol/node";
const {contracts} = loadDeployment(16661, "./deployments"); // 0G mainnet

MIT.

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Declared dependencies 4

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4 direct targetsNot calculated transitive count
Package / targetRequirementRelationship
tsx
Environment
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^4.19.2development
vitest
Environment
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^3.0.5development
typescript
Environment
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^5.7.2development
@types/node
Environment
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  "alias": false,
  "peer_metadata": null
}
^22.10.0development

Distribution files

1 collected
Distribution 1

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Source file
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hevdev7/0g-brier

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Observed since 20 Oct, 22:10 UTC

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package_version:09d80a7e63b047e47308d23448bd9f4e4d4d08d989e95206a00742400c38bd87

Other collected versions

0.2.11 Sept0.1.029 AugView all collected versions →