Signing a multisig transaction

To sign a transaction with a multisig wallet, you need to send the transaction file to each member and which in turn will generate their respective signature. For example, a multisig wallet is created with a threshold of 2/3. You need at least 2 signatures and then combine them into to a multi-signature. That signature will be used to broadcast in the next step.

Step 1: Sign individually

Sign with test1 and test2 and create individual signatures.

aurad tx sign \
    unsignedTx.json \
    --from test1 \
    --multisig aura1tk736vetmgplrefcak0l62gak8h28m9ccqynxj \
    --sign-mode amino-json \
    --chain-id aura_6322-2 \
    --node https://rpc.aura.network:443 \
    --output-document=tx-signed-test1.json

aurad tx sign \
    unsignedTx.json \
    --multisig aura1tk736vetmgplrefcak0l62gak8h28m9ccqynxj \
    --from test2 \
    --sign-mode amino-json \
    --chain-id aura_6322-2 \
    --node https://rpc.aura.network:443 \
    --output-document=tx-signed-test2.json

Step 2: Create multi-signature

Combine signatures to sign transaction.

aurad tx multisign \
    unsignedTx.json \
    multi \
    tx-signed-test1.json tx-signed-test2.json \
    --chain-id aura_6322-2 \
    --node https://rpc.aura.network:443 > signedTx.json

The TX is now signed.

{
  "body": {
    "messages": [
      {
        "@type": "/cosmos.bank.v1beta1.MsgSend",
        "from_address": "aura1tk736vetmgplrefcak0l62gak8h28m9ccqynxj",
        "to_address": "aura1hctj3tpmucmuv02umf9252enjedkce7mml69k8",
        "amount": [
          {
            "denom": "uaura",
            "amount": "1000000"
          }
        ]
      }
    ],
    "memo": "",
    "timeout_height": "0",
    "extension_options": [],
    "non_critical_extension_options": []
  },
  "auth_info": {
    "signer_infos": [
      {
        "public_key": {
          "@type": "/cosmos.crypto.multisig.LegacyAminoPubKey",
          "threshold": 2,
          "public_keys": [
            {
              "@type": "/cosmos.crypto.secp256k1.PubKey",
              "key": "Arow5Hb8CbBYKWjuWIM5KWoEvbwCUmNti+2Kdaqrjd/T"
            },
            {
              "@type": "/cosmos.crypto.secp256k1.PubKey",
              "key": "Asc2LPPqgjWTuKvGZMKrhLXUxFjyLRtxy4mBtxqw3RG2"
            },
            {
              "@type": "/cosmos.crypto.secp256k1.PubKey",
              "key": "AmFtbMlegjibAduEBfNyZcVjrIN3W8JzGu/eIGzBUDVI"
            }
          ]
        },
        "mode_info": {
          "multi": {
            "bitarray": {
              "extra_bits_stored": 3,
              "elems": "YA=="
            },
            "mode_infos": [
              {
                "single": {
                  "mode": "SIGN_MODE_LEGACY_AMINO_JSON"
                }
              },
              {
                "single": {
                  "mode": "SIGN_MODE_LEGACY_AMINO_JSON"
                }
              }
            ]
          }
        },
        "sequence": "0"
      }
    ],
    "fee": {
      "amount": [
        {
          "denom": "uaura",
          "amount": "100000"
        }
      ],
      "gas_limit": "200000",
      "payer": "",
      "granter": ""
    }
  },
  "signatures": [
    "CkDDowe0qGxH+5OE99Xc4dSuD+SeSXoN5sZTEwGG2pBUripo6ri5XrtcSeigkcqmCY+0anBFcmFAFnmVrYxt9v1KCkDAjWX1Xsik1F62RZJ0o62+7BdfRUIO0THOfKihP0gx11mBxdEd3DGi1ZwU4pgNznibawrmpiPaaTYvBQjbPC7l"
  ]