> For the complete documentation index, see [llms.txt](https://near-sdk-js.gitbook.io/near-sdk-js/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://near-sdk-js.gitbook.io/near-sdk-js/api/functions/altbn128g1sum.md).

# altBn128G1Sum

[**api**](/near-sdk-js/api.md) • **Docs**

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[near-sdk-js v2.0.0](/near-sdk-js/packages.md) / [api](/near-sdk-js/api.md) / altBn128G1Sum

## Function: altBn128G1Sum()

> **altBn128G1Sum**(`value`): `Uint8Array`

Computes sum for signed g1 group elements on alt\_bn128 curve \sum\_i (-1)^{sign\_i} g\_{1 i} should be equal result.

### Parameters

• **value**: `Uint8Array`

sequence of (sign:bool, g1:G1), where G1 is point (x:Fq, y:Fq) on alt\_bn128, alt\_bn128 is Y^2 = X^3 + 3 curve over Fq. value`is encoded a as packed, little-endian`\[((u256, u256), ((u256, u256), (u256, u256)))]\` slice.

### Returns

`Uint8Array`

sum over Fq.

### Defined in

[packages/near-sdk-js/src/api.ts:995](https://github.com/near/near-sdk-js/blob/b58ac04fc6dff2f1120e9098c0cb059493486598/packages/near-sdk-js/src/api.ts#L995)