zeth.core.pairing Namespace Reference

Classes
class	G1Point
class	G2Point
class	PairingParameters

Functions
G1Point	g1_point_from_proto (ec_group_messages_pb2.Group1Point point)
None	g1_point_to_proto (G1Point g1, ec_group_messages_pb2.Group1Point g1_proto)
List[int]	g1_point_to_contract_parameters (G1Point g1)
G2Point	g2_point_from_proto (ec_group_messages_pb2.Group2Point point)
None	g2_point_to_proto (G2Point g2, ec_group_messages_pb2.Group2Point g2_proto)
List[int]	g2_point_to_contract_parameters (G2Point g2)
PairingParameters	pairing_parameters_from_proto (ec_group_messages_pb2.PairingParameters pairing_params_proto)
str	field_element_negate (str value_hex, str mod_hex)
G1Point	g1_point_negate (G1Point g1, PairingParameters pairing_parameters)
G2Point	g2_point_negate (G2Point g2, PairingParameters pp)

Function Documentation

field_element_negate()

str zeth.core.pairing.field_element_negate	(	str	value_hex,
		str	mod_hex
	)

Definition at line 178 of file pairing.py.

def field_element_negate(value_hex: str, mod_hex: str) -> str:
    mod, num_bytes = int_and_bytelen_from_hex(mod_hex)
    value = int(value_hex, 16)
    value = mod - (value % mod)
    return int_to_hex(value, num_bytes)
 
 

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g1_point_from_proto()

G1Point zeth.core.pairing.g1_point_from_proto

(

ec_group_messages_pb2.Group1Point

point

)

Definition at line 45 of file pairing.py.

def g1_point_from_proto(
        point: ec_group_messages_pb2.Group1Point) -> G1Point:
    x_coord = json.loads(point.x_coord)
    y_coord = json.loads(point.y_coord)
    assert isinstance(x_coord, str)
    assert isinstance(y_coord, str)
    return G1Point(x_coord, y_coord)
 
 

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g1_point_negate()

G1Point zeth.core.pairing.g1_point_negate	(	G1Point	g1,
		PairingParameters	pairing_parameters
	)

Definition at line 185 of file pairing.py.

def g1_point_negate(
        g1: G1Point,
        pairing_parameters: PairingParameters) -> G1Point:
    return G1Point(
        g1.x_coord, field_element_negate(g1.y_coord, pairing_parameters.q))
 
 

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g1_point_to_contract_parameters()

List[int] zeth.core.pairing.g1_point_to_contract_parameters

(

G1Point

g1

)

Definition at line 61 of file pairing.py.

def g1_point_to_contract_parameters(g1: G1Point) -> List[int]:
    return \
        list(hex_to_uint256_list(g1.x_coord)) + \
        list(hex_to_uint256_list(g1.y_coord))
 
 

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g1_point_to_proto()

None zeth.core.pairing.g1_point_to_proto	(	G1Point	g1,
		ec_group_messages_pb2.Group1Point	g1_proto
	)

Definition at line 54 of file pairing.py.

def g1_point_to_proto(
        g1: G1Point,
        g1_proto: ec_group_messages_pb2.Group1Point) -> None:
    g1_proto.x_coord = json.dumps(g1.x_coord)
    g1_proto.y_coord = json.dumps(g1.y_coord)
 
 

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g2_point_from_proto()

G2Point zeth.core.pairing.g2_point_from_proto

(

ec_group_messages_pb2.Group2Point

point

)

Definition at line 99 of file pairing.py.

def g2_point_from_proto(
        point: ec_group_messages_pb2.Group2Point) -> G2Point:
    return G2Point(
        x_coord=json.loads(point.x_coord),
        y_coord=json.loads(point.y_coord))
 
 

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g2_point_negate()

G2Point zeth.core.pairing.g2_point_negate	(	G2Point	g2,
		PairingParameters	pp
	)

Definition at line 192 of file pairing.py.

def g2_point_negate(
        g2: G2Point,
        pp: PairingParameters) -> G2Point:
    if isinstance(g2.y_coord, str):
        return G2Point(g2.x_coord, field_element_negate(g2.y_coord, pp.q))
    return G2Point(
        g2.x_coord, [field_element_negate(y, pp.q) for y in g2.y_coord])

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g2_point_to_contract_parameters()

List[int] zeth.core.pairing.g2_point_to_contract_parameters

(

G2Point

g2

)

Definition at line 113 of file pairing.py.

def g2_point_to_contract_parameters(g2: G2Point) -> List[int]:
    if isinstance(g2.x_coord, str):
        assert isinstance(g2.y_coord, str)
        return \
            list(hex_to_uint256_list(g2.x_coord)) + \
            list(hex_to_uint256_list(g2.y_coord))
    return \
        hex_list_to_uint256_list(g2.x_coord) + \
        hex_list_to_uint256_list(g2.y_coord)
 
 

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g2_point_to_proto()

None zeth.core.pairing.g2_point_to_proto	(	G2Point	g2,
		ec_group_messages_pb2.Group2Point	g2_proto
	)

Definition at line 106 of file pairing.py.

def g2_point_to_proto(
        g2: G2Point,
        g2_proto: ec_group_messages_pb2.Group2Point) -> None:
    g2_proto.x_coord = json.dumps(g2.x_coord)
    g2_proto.y_coord = json.dumps(g2.y_coord)
 
 

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pairing_parameters_from_proto()

PairingParameters zeth.core.pairing.pairing_parameters_from_proto

(

ec_group_messages_pb2.PairingParameters

pairing_params_proto

)

Definition at line 167 of file pairing.py.

def pairing_parameters_from_proto(
        pairing_params_proto: ec_group_messages_pb2.PairingParameters
) -> PairingParameters:
    return PairingParameters(
        name=pairing_params_proto.name,
        r=pairing_params_proto.r,
        q=pairing_params_proto.q,
        generator_g1=g1_point_from_proto(pairing_params_proto.generator_g1),
        generator_g2=g2_point_from_proto(pairing_params_proto.generator_g2))
 
 

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