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Tx & HashPreimage Breakdown.md

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Chosen P2PKH Transaction: https://mempool.space/tx/b6f5cb50a8ec7017202efd3744a94c43a4898545ac82725b6cfbd7d89ba344a2

TRANSACTION:

Transaction HEX:

01000000012a0113029e78de5a243b205e2ed2cf4f214015ba95221047774832f7059c04ba000000006b483045022100d79836dbd86162e3c3a38bbf31f6547c3600e4f52330a8d55aa591e8896d61900220332331d6d5c2c63db6174465aba6b848a4230ce943cffcf77ffdc02a30a8fbd70121020ce5eb2757373d469b59c971a498df4cf2484d52ef875024f1d924d22a0cc17cffffffff01a4180500000000001976a9142279f73d5766231f005e826577854decdce8d34688ac00000000

TRANSACTION BREAKDOWN:

  • 01000000 - Version

  • 01 – Number of Inputs

  • 2a0113029e78de5a243b205e2ed2cf4f214015ba95221047774832f7059c04ba – Tx-ID of the previous tx (in Little endian format)

  • 00000000 – Input to be spent, in this case the Input at position 0.

  • ScriptSig - Unlocking Script

    • 6b – Length of the ScriptSig (214 characters)
    • 48 – Length of the signature within the ScriptSig (144 characters) - OP_PUSH72
    • 30 – Indicates that the signature encoding is DER (ASN.1)
    • 45 – Length of the Signature values (138 characters)
    • 02 – Indicates that r is an integer value
    • 21 – Length of r (66 characters)
    • 00d79836dbd86162e3c3a38bbf31f6547c3600e4f52330a8d55aa591e8896d6190 – r
    • 02 – Indicates that s is an integer value
    • 20 – Length of s (64 characters)
    • 332331d6d5c2c63db6174465aba6b848a4230ce943cffcf77ffdc02a30a8fbd7 – s
    • 01 – HashType, in this case SIGHASH ALL
    • 21 – Length of the Public Key (66 characters) - OP_PUSH33
    • 020ce5eb2757373d469b59c971a498df4cf2484d52ef875024f1d924d22a0cc17c – Compressed Public Key

  • ffffffff – Sequence

  • 01 – Number of Outputs

  • a418050000000000 – Amount of Satoshis sent to the next output (in Little endian format)

  • ScriptPubKey – Locking Script where the funds are locked at the receiving address.

    • 19 – Length of the ScriptPubKey (50 characters)
    • 76 – OP_DUP
    • a9 – OP_HASH160
    • 14 – OP_PUSH20 (Pushes the next 40 characters)
    • 2279f73d5766231f005e826577854decdce8d346 (Public Key Hash, address where the funds we are spending are arriving: 149J5rV5seYAuJnN2NuPt88aaT3LTK6miQ)
    • 88 – OP_EQUALVERIFY
    • ac – OP_CHECKSIG

  • 00000000 – Locktime

PROTO-TRANSACTION

Proto-Transaction HEX:

01000000012a0113029e78de5a243b205e2ed2cf4f214015ba95221047774832f7059c04ba000000001976a914610f04edfac91d244149203e48a5a089991a2ac188acffffffff01a4180500000000001976a9142279f73d5766231f005e826577854decdce8d34688ac0000000001000000

PROTO-TRANSACTION BREAKDOWN:

  • 01000000 - Version

  • 01 – Number of Inputs

  • 2a0113029e78de5a243b205e2ed2cf4f214015ba95221047774832f7059c04ba – Tx-ID of the previous tx (in Little endian format)

  • 00000000 – Input to be spent, in this case the Input at position 0.

  • ScriptPubKey - Locking Script to be unlocked to make the transaction

    • 19 – Length of the ScriptPubKey (50 characters)
    • 76 – OP_DUP
    • a9 – OP_HASH160
    • 14 – OP_PUSH20 (Pushes the next 40 characters)
    • 610f04edfac91d244149203e48a5a089991a2ac1 (Public Key Hash, address where the funds we are spending were: 19rCYAVvroJXe5VuvzjBUgx4TSmBqjtAp9)
    • 88 – OP_EQUALVERIFY
    • ac – OP_CHECKSIG

  • ffffffff – Sequence

  • 01 – Number of Outputs

  • a418050000000000 – Amount of Satoshis sent to the next output (in Little endian format)

  • ScriptPubKey – Locking Script where the funds are locked at the receiving address.

    • 19 – Length of the ScriptPubKey (50 characters)
    • 76 – OP_DUP
    • a9 – OP_HASH160
    • 14 – OP_PUSH20 (Pushes the next 40 characters)
    • 2279f73d5766231f005e826577854decdce8d346 (Public Key Hash, address where the funds we are spending are arriving: 149J5rV5seYAuJnN2NuPt88aaT3LTK6miQ)
    • 88 – OP_EQUALVERIFY
    • ac – OP_CHECKSIG

  • 00000000 – Locktime

  • 01000000 - HashType, in this case SIGHASH ALL