Signing and calculating contribution file.

[rootwarp]

contribution contents from try_contribute

contributions: [
    {
      numG1Powers: 4096,
      numG2Powers: 65,
      powersOfTau: [Object],
      potPubkey: '0x93e02b6052719f607dacd3a088274f65596bd0d09920b61ab5da61bbdc7f5049334cf11213945d57e5ac7d055d042b7e024aa2b2f08f0a91260805272dc51051c6e47ad4fa403b02b4510b647ae3d1770bac0326a805bbefd48056c8c121bdb8',
      blsSignature: ''
    },
    {
      numG1Powers: 8192,
      numG2Powers: 65,
      powersOfTau: [Object],
      potPubkey: '0x93e02b6052719f607dacd3a088274f65596bd0d09920b61ab5da61bbdc7f5049334cf11213945d57e5ac7d055d042b7e024aa2b2f08f0a91260805272dc51051c6e47ad4fa403b02b4510b647ae3d1770bac0326a805bbefd48056c8c121bdb8',
      blsSignature: ''
    },
    {
      numG1Powers: 16384,
      numG2Powers: 65,
      powersOfTau: [Object],
      potPubkey: '0x93e02b6052719f607dacd3a088274f65596bd0d09920b61ab5da61bbdc7f5049334cf11213945d57e5ac7d055d042b7e024aa2b2f08f0a91260805272dc51051c6e47ad4fa403b02b4510b647ae3d1770bac0326a805bbefd48056c8c121bdb8',
      blsSignature: ''
    },
    {
      numG1Powers: 32768,
      numG2Powers: 65,
      powersOfTau: [Object],
      potPubkey: '0x93e02b6052719f607dacd3a088274f65596bd0d09920b61ab5da61bbdc7f5049334cf11213945d57e5ac7d055d042b7e024aa2b2f08f0a91260805272dc51051c6e47ad4fa403b02b4510b647ae3d1770bac0326a805bbefd48056c8c121bdb8',
      blsSignature: ''
    }
  ],
  ecdsaSignature: ''

• BLS library: https://github.com/herumi/bls