keygen generates keypair with private key length of 31 bytes

[zhenkuncua]

hi, on occasions, the library generates keys with 31 bytes, but filecoin expects a 32 byte private key.

[MakMuftic]

Hi @zhenkuncua, can you provide me with more context or a way to reproduce this behavior?

[zhenkuncua]

hi @MakMuftic ,

this is the code used:

const bip39=require("bip39");
const keygen = require("@nodefactory/filecoin-address");

function newAddr(){
   const mnemonic = bip39.generateMnemonic();	
   const key = bip39.mnemonicToSeedSync(mnemonic);
   const keypair= keygen.keyPairFromSeed(key,"f");
   return {
       address: keypair.address,
       private: {"Type":"secp256k1","PrivateKey":Buffer.from(keypair.privateKey,'HEX').toString('BASE64')}
   }     
 }

this is one of the invalid outputs:

{"address":"f1twfcpb5abskwqghpdpazrxvdbktmbexwuczfucy","private"{"Type":"secp256k1","PrivateKey":"qocfoZepRwo6QzCjFJoEaEyd6eGYfBI3civ0NcZ96Q=="}}

the issue cannot be replicated consistently, but within 4000 generations, I've encountered 6 cases. I'm still trying to replicate the problem but the code has been running for 24 hours already but has not yet found another case yet.