Computes multiexp on alt_bn128 curve using Pippenger's algorithm \sum_i
mul_i g_{1 i} should be equal result.
Parameters
value: Uint8Array
equence of (g1:G1, fr:Fr), 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 as packed, little-endian
[((u256, u256), u256)] slice.
Computes multiexp on alt_bn128 curve using Pippenger's algorithm \sum_i mul_i g_{1 i} should be equal result.