Function encode

packages/airnode-abi/src/encoding.ts:41–66

(parameters: InputParameter[])

}

export function encode(parameters: InputParameter[]): string {
  const types = parameters.map((parameter) => parameter.type) as ParameterType[];

  // Each parameter name is represented by a `bytes32` string. The value
  // types are what the user provides
  const nameTypePairs = flatMap(types, (type) => {
    const transformedType = TYPE_TRANSFORMATIONS[type];
    return ['bytes32', transformedType ?? type];
  });

  // The first type is always a bytes32 as it represents the schema header
  const allTypes = ['bytes32', ...nameTypePairs];

  // Build the schema which includes the version and the abbreviated list of parameters
  const schemaHeader = buildSchemaHeader(types as ParameterType[]);
  const encodedHeader = ethers.utils.formatBytes32String(schemaHeader);

  // Map and encode each name/value pair where necessary
  const flatNameValues = buildNameValuePairs(parameters);

  // The schema header is always the first value to be encoded
  const allValues = [encodedHeader, ...flatNameValues];

  const encoder = new ethers.utils.AbiCoder();
  return encoder.encode(allTypes, allValues);
}