Transaction updation in MPC1

The follow examples can be found on testnet explorer.

PoS Block

A valid PoS block’s block_version is 2 and has blocksig field on it’s block header. A PoS block at least has two transactions. One is coinbase and the other is coinstake。

• coinbase: same as coinbase of PoW block, its outputs include the mining reward.
• coinstake: inputs is the stake of PoS and the first output is null.

Example：
PoS Block 1019574 on testnet:

{
    "bits" : "2760509629",
    "blocksig" : "38869496671253c154656992695dddabfdc565f5a94c288fc1924969a9fcba07531d86a879b37d85a43f8bdf5318ee2f9b471477c7983e44ea5e2fcad2a0eb2f",
    "hash" : "590fe4d061df5c02544b3b01b67b76c9170c9778e8e910f490e1a597f2a98b23",
    "merkle_tree_hash" : "5604e4303aa63ad85f89008da4c73871cbc2fc5f7b27db218827af2e52763687",
    "mixhash" : "0",
    "nonce" : "0",
    "number" : 1019574,
    "previous_block_hash" : "1be1e752fc1f2d3b2eaf306a17027abd0f5402c6064a6c04ffd595445c81fc86",
    "timestamp" : 1548214357,
    "transaction_count" : 2,
    "transactions" : 
    [
        {
            "hash" : "0ca5c0e285c180256b44eae94d570fc67366c52ed4fa62a4dd9e9c07e3eddc99",
            "inputs" : 
            [
                {
                    "previous_output" : 
                    {
                        "hash" : "0000000000000000000000000000000000000000000000000000000000000000",
                        "index" : 4294967295
                    },
                    "script" : "[ b68e0f ]",
                    "sequence" : 0
                }
            ],
            "lock_time" : "0",
            "outputs" : 
            [
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "attachment" : 
                    {
                        "type" : "etp"
                    },
                    "index" : 0,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 4f4e6201241b25f48183dda03f63229fecd2ba4d ] equalverify checksig",
                    "value" : 10754578
                }
            ],
            "version" : "1"
        },
        {
            "hash" : "c246e71b06e75c7d56b7120fda9c8344c45b0aaf4922e8bea8c7ff50b7e79d8e",
            "inputs" : 
            [
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "previous_output" : 
                    {
                        "hash" : "64337595f1a9538fffca3b892cd1bf0a69910ae505f5735533be778a39f54904",
                        "index" : 1
                    },
                    "script" : "[ 304402205ea27de31e85621d36e5f40aee3cce42639d81059910f2a8f58320f0413ad60d022066747e91635f9b95823d67175b7f5ba3b4e594265f58003fba736fc2ffbd808201 ] [ 026bd7e6d504f3737b930f9fc222dc519c147fb0f0a8ac0216458b637cab25427c ]",
                    "sequence" : 4294967295
                },
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "previous_output" : 
                    {
                        "hash" : "e5438e1991d84b2d5ccdfd7f78a04b2c19cb46edcea2a8a3a7cd4dab7e9c404d",
                        "index" : 0
                    },
                    "script" : "[ 30450221008731b85098d0ee77556e5f0c9a2429b73148a90b315fb4f9233a72fa239792dc022047972f648ca3ace381cca830687c06aa3e384d13d23fc1e60380ce4581cf01f901 ] [ 026bd7e6d504f3737b930f9fc222dc519c147fb0f0a8ac0216458b637cab25427c ]",
                    "sequence" : 4294967295
                }
            ],
            "lock_time" : "0",
            "outputs" : 
            [
                {
                    "attachment" : 
                    {
                        "type" : "coinstake"
                    },
                    "index" : 0,
                    "locked_height_range" : 0,
                    "script" : "",
                    "value" : 0
                },
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "attachment" : 
                    {
                        "type" : "etp"
                    },
                    "index" : 1,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 4f4e6201241b25f48183dda03f63229fecd2ba4d ] equalverify checksig",
                    "value" : 100032829764
                }
            ],
            "version" : "1"
        }
    ],
    "version" : 2
}

This PoS block has two transations:

• The first is coinbase. Its hash is 0ca5c0e285c180256b44eae94d570fc67366c52ed4fa62a4dd9e9c07e3eddc99;
• The second is coinstake. Its hash is c246e71b06e75c7d56b7120fda9c8344c45b0aaf4922e8bea8c7ff50b7e79d8e.

PoS Genesis Block

PoS genesis block is a PoS block. It has coinbase and coinstake too. Beside it has the third transation PoS genesis transation. PoS genesis transation includes the reward for PoS genesis block and 23 witness certificates which are sent to foundation of Metaverse.

Example:
PoS genesis block on testnet is block 991505:

{
    "bits" : "1000000",
    "blocksig" : "08a0040c78daa152c7fc55ac8bbde0276815af1ffdd341aa2bd03dbfe99c8bdcae94272a8b60088bff75558932ad6070ccb93b62c2f462fab8c4def64e45ee5b",
    "hash" : "37d4536c18a46116de359680301b09ba267c7ab9deffd3b7794aaa857ab42e14",
    "merkle_tree_hash" : "56fbbba222565d8fe7c6278be8e1ca5a97c67e29aa2d058989356e22a1bb25c5",
    "mixhash" : "0",
    "nonce" : "0",
    "number" : 991505,
    "previous_block_hash" : "1b8fc39f70983da89aebad22f3ee7354257e57f10efe292abc880d8704c7cd91",
    "timestamp" : 1547629552,
    "transaction_count" : 3,
    "transactions" : 
    [
        {
            "hash" : "e7a25724eccc05fb5f36d14c6e851037dd9e3c9f5002853c2e623e7a64b790f8",
            "inputs" : 
            [
                {
                    "previous_output" : 
                    {
                        "hash" : "0000000000000000000000000000000000000000000000000000000000000000",
                        "index" : 4294967295
                    },
                    "script" : "[ 11210f ]",
                    "sequence" : 0
                }
            ],
            "lock_time" : "0",
            "outputs" : 
            [
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "attachment" : 
                    {
                        "type" : "etp"
                    },
                    "index" : 0,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 4f4e6201241b25f48183dda03f63229fecd2ba4d ] equalverify checksig",
                    "value" : 11320608
                }
            ],
            "version" : "1"
        },
        {
            "hash" : "21ab6dca066b6a7cdbaa71f4564f6979b9484b86c387885d91126a03f54949fc",
            "inputs" : 
            [
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "previous_output" : 
                    {
                        "hash" : "88f86937cffa9f9cdf55a14dc154dd5534690d1a86981d83f49a8386a7fde34f",
                        "index" : 0
                    },
                    "script" : "[ 3045022100ab835030425bd60173c9e3e5cbb7818fab48260f69cfa32ff5a528cb70160a4002202aa01254275f1117cbc21d396cd6c1202d0d480c13c0d68804291cf41b32cd2b01 ] [ 026bd7e6d504f3737b930f9fc222dc519c147fb0f0a8ac0216458b637cab25427c ]",
                    "sequence" : 4294967295
                },
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "previous_output" : 
                    {
                        "hash" : "88f86937cffa9f9cdf55a14dc154dd5534690d1a86981d83f49a8386a7fde34f",
                        "index" : 1
                    },
                    "script" : "[ 30440220746ca6690f75a5e3f7da75b6afdd6eae33174ce3acc47ea0d7d4eeb67de2960002202b8b62f96cea12dd0a136f349c31258b09784d8fa24ee14cd668cd0fde5f8da401 ] [ 026bd7e6d504f3737b930f9fc222dc519c147fb0f0a8ac0216458b637cab25427c ]",
                    "sequence" : 4294967295
                }
            ],
            "lock_time" : "0",
            "outputs" : 
            [
                {
                    "attachment" : 
                    {
                        "type" : "coinstake"
                    },
                    "index" : 0,
                    "locked_height_range" : 0,
                    "script" : "",
                    "value" : 0
                },
                {
                    "address" : "tE9wL5d8YK94JgMHrV8HvK5pwb7tAqdHmn",
                    "attachment" : 
                    {
                        "type" : "etp"
                    },
                    "index" : 1,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 4f4e6201241b25f48183dda03f63229fecd2ba4d ] equalverify checksig",
                    "value" : 120776443211
                }
            ],
            "version" : "1"
        },
        {
            "hash" : "9a71d084b472468421012b1c4a25ef3e2e42d2712069d2a447a7befaab92bcad",
            "inputs" : 
            [
                {
                    "previous_output" : 
                    {
                        "hash" : "0000000000000000000000000000000000000000000000000000000000000000",
                        "index" : 4294967295
                    },
                    "script" : "[ 004100b8087f00007420506f532061742020a900b8087f0000404200b8087f0000b04100 ]",
                    "sequence" : 0
                }
            ],
            "lock_time" : "0",
            "outputs" : 
            [
                {
                    "address" : "tBELxsiiaMVGQcY2Apf7hmzAaipD4YWTTj",
                    "attachment" : 
                    {
                        "type" : "etp"
                    },
                    "index" : 0,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 2f3b65f87fa30c7fc1b5e2919daf0aad0e42b074 ] equalverify checksig",
                    "value" : 1726452600000000
                },
                {
                    "address" : "tBELxsiiaMVGQcY2Apf7hmzAaipD4YWTTj",
                    "attachment" : 
                    {
                        "address" : "tBELxsiiaMVGQcY2Apf7hmzAaipD4YWTTj",
                        "cert" : "witness",
                        "owner" : "yoyo",
                        "symbol" : "MVS.WITNESS.1",
                        "type" : "asset-cert"
                    },
                    "index" : 1,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 2f3b65f87fa30c7fc1b5e2919daf0aad0e42b074 ] equalverify checksig",
                    "value" : 0
                },
                {
                    // skip other witness certificates...
                },
                {
                    "address" : "tBELxsiiaMVGQcY2Apf7hmzAaipD4YWTTj",
                    "attachment" : 
                    {
                        "address" : "tBELxsiiaMVGQcY2Apf7hmzAaipD4YWTTj",
                        "cert" : "witness",
                        "owner" : "yoyo",
                        "symbol" : "MVS.WITNESS.23",
                        "type" : "asset-cert"
                    },
                    "index" : 23,
                    "locked_height_range" : 0,
                    "script" : "dup hash160 [ 2f3b65f87fa30c7fc1b5e2919daf0aad0e42b074 ] equalverify checksig",
                    "value" : 0
                }
            ],
            "version" : "0"
        }
    ],
    "version" : 2
}

PoS genesis block has three transations:

• The first is coinbase and its hash is e7a25724eccc05fb5f36d14c6e851037dd9e3c9f5002853c2e623e7a64b790f8；
• The second is coinstake and its hash is 21ab6dca066b6a7cdbaa71f4564f6979b9484b86c387885d91126a03f54949fc；
• The third is PoS genesis transation and its hash is 9a71d084b472468421012b1c4a25ef3e2e42d2712069d2a447a7befaab92bcad；

Relative lock-time (RLT) transation

Metaverse implements Relative lock-time (RLT) defined in BIP112. The script of RLT transation contains op code CHECKSEQUENCEVERIFY (which uses NOP4 (=179) instead of NOP3 (=178) because NOP3 is used for another extented operation CHECKATTENUATIONVERIFY in metaverse, please notice this difference from Bitcoin.).

Example:
RLT transation 2912621cb70244d878ed0594d1bf841191d5323347cad76b3126085220692702 locks 1000 ETP for 10000000 height. You can found op code ‘checksequenceverify’ on its script field.

{
    "hash" : "2912621cb70244d878ed0594d1bf841191d5323347cad76b3126085220692702",
    "inputs" : 
    [
        {
            "address" : "t76YL2e4CQ17rY9SrrL3LSuNRrRr9b2iAk",
            "previous_output" : 
            {
                "hash" : "b3fdd7ef0fb5b765a94d1ad5849789430d7ac03ee62c35c7912a2cdbde43a22b",
                "index" : 2
            },
            "script" : "[ 3044022043a54fb6d713a4fa56728f0bf7c7a39e291ced7a7a8ff27267b8f86712391cf40220453e2c5e0bfbb96cd5c60e63bdac5fb9a09ae3983f801c776584bb892d72154701 ] [ 02efe188fa25406d3662fcf372cb28a31473827c5d3e01a411b1c7515b1550e917 ]",
            "sequence" : 4294967295
        }
    ],
    "lock_time" : "0",
    "outputs" : 
    [
        {
            "address" : "t76YL2e4CQ17rY9SrrL3LSuNRrRr9b2iAk",
            "attachment" : 
            {
                "type" : "etp"
            },
            "index" : 0,
            "locked_height_range" : 0,
            "script" : "[ 80969800 ] checksequenceverify drop dup hash160 [ 01e10de596cc7067f098bc854eec51644d5704e1 ] equalverify checksig",
            "value" : 100000000000
        },
        {
            "address" : "t76YL2e4CQ17rY9SrrL3LSuNRrRr9b2iAk",
            "attachment" : 
            {
                "type" : "etp"
            },
            "index" : 1,
            "locked_height_range" : 0,
            "script" : "dup hash160 [ 01e10de596cc7067f098bc854eec51644d5704e1 ] equalverify checksig",
            "value" : 19899990000
        }
    ],
    "version" : "4"
}