Creating a mutisig signature using the IOTA protocol

iota_multisig.js

// IOTA JS reference library https://github.com/iotaledger/iota.lib.js/
// Examples of multi-sig transfers can be found at https://github.com/iotaledger/iota.lib.js/blob/master/examples/multisig.js
iota.multisig.initiateTransfer(input, remainderAddress, multisigTransfer, function(e, initiatedBundle) {
  iota.multisig.addSignature(initiatedBundle, address, iota.multisig.getKey('ABCDFG', 0, 3), function(e,firstSignedBundle) {
    iota.multisig.addSignature(firstSignedBundle, address, iota.multisig.getKey('FDSAG', 0, 3), function(e,finalBundle) {
      if (isNonEmptyObject(e)) {
        console.log("IS VALID SIGNATURE: ", iota.utils.validateSignatures(finalBundle, address));
      }
    });
  });
});