diff --git a/src/consts.rs b/src/consts.rs
index 52b4039..ccfa1b7 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -9,6 +9,21 @@
 pub(crate) const PSBT_GLOBAL_UNSIGNED_TX: u8 = 0x00;
 /// Type: Extended Public Key PSBT_GLOBAL_XPUB = 0x01
 pub(crate) const PSBT_GLOBAL_XPUB: u8 = 0x01;
+/// Type: Transaction Version PSBT_GLOBAL_TX_VERSION = 0x02
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_GLOBAL_TX_VERSION: u8 = 0x02;
+/// Type: Fallback Locktime PSBT_GLOBAL_FALLBACK_LOCKTIME = 0x03
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_GLOBAL_FALLBACK_LOCKTIME: u8 = 0x03;
+/// Type: Input Count PSBT_GLOBAL_INPUT_COUNT = 0x04
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_GLOBAL_INPUT_COUNT: u8 = 0x04;
+/// Type: Output Count PSBT_GLOBAL_OUTPUT_COUNT = 0x05
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_GLOBAL_OUTPUT_COUNT: u8 = 0x05;
+/// Type: Transaction Modifiable Flags PSBT_GLOBAL_TX_MODIFIABLE = 0x06
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_GLOBAL_TX_MODIFIABLE: u8 = 0x06;
 /// Type: Version Number PSBT_GLOBAL_VERSION = 0xFB
 pub(crate) const PSBT_GLOBAL_VERSION: u8 = 0xFB;
 /// Type: Proprietary Use Type PSBT_GLOBAL_PROPRIETARY = 0xFC
@@ -32,6 +47,9 @@ pub(crate) const PSBT_IN_BIP32_DERIVATION: u8 = 0x06;
 pub(crate) const PSBT_IN_FINAL_SCRIPTSIG: u8 = 0x07;
 /// Type: Finalized scriptWitness PSBT_IN_FINAL_SCRIPTWITNESS = 0x08
 pub(crate) const PSBT_IN_FINAL_SCRIPTWITNESS: u8 = 0x08;
+/// Type: Proof-of-reserves commitment PSBT_IN_POR_COMMITMENT = 0x09
+#[allow(unused)] // PSBT v0
+pub(crate) const PSBT_IN_POR_COMMITMENT: u8 = 0x09;
 /// Type: RIPEMD160 preimage PSBT_IN_RIPEMD160 = 0x0a
 pub(crate) const PSBT_IN_RIPEMD160: u8 = 0x0a;
 /// Type: SHA256 preimage PSBT_IN_SHA256 = 0x0b
@@ -40,6 +58,21 @@ pub(crate) const PSBT_IN_SHA256: u8 = 0x0b;
 pub(crate) const PSBT_IN_HASH160: u8 = 0x0c;
 /// Type: HASH256 preimage PSBT_IN_HASH256 = 0x0d
 pub(crate) const PSBT_IN_HASH256: u8 = 0x0d;
+/// Type: Previous TXID PSBT_IN_PREVIOUS_TXID = 0x0e
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_IN_PREVIOUS_TXID: u8 = 0x0e;
+/// Type: Spent Output Index PSBT_IN_OUTPUT_INDEX = 0x0f
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_IN_OUTPUT_INDEX: u8 = 0x0f;
+/// Type: Sequence Number PSBT_IN_SEQUENCE = 0x10
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_IN_SEQUENCE: u8 = 0x10;
+/// Type: Required Time-based Locktime PSBT_IN_REQUIRED_TIME_LOCKTIME = 0x11
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_IN_REQUIRED_TIME_LOCKTIME: u8 = 0x11;
+/// Type: Required Height-based Locktime PSBT_IN_REQUIRED_HEIGHT_LOCKTIME = 0x12
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_IN_REQUIRED_HEIGHT_LOCKTIME: u8 = 0x12;
 /// Type: Taproot Signature in Key Spend PSBT_IN_TAP_KEY_SIG = 0x13
 pub(crate) const PSBT_IN_TAP_KEY_SIG: u8 = 0x13;
 /// Type: Taproot Signature in Script Spend PSBT_IN_TAP_SCRIPT_SIG = 0x14
@@ -61,6 +94,12 @@ pub(crate) const PSBT_OUT_REDEEM_SCRIPT: u8 = 0x00;
 pub(crate) const PSBT_OUT_WITNESS_SCRIPT: u8 = 0x01;
 /// Type: BIP 32 Derivation Path PSBT_OUT_BIP32_DERIVATION = 0x02
 pub(crate) const PSBT_OUT_BIP32_DERIVATION: u8 = 0x02;
+/// Type: Output Amount PSBT_OUT_AMOUNT = 0x03
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_OUT_AMOUNT: u8 = 0x03;
+/// Type: Output Script PSBT_OUT_SCRIPT = 0x04
+#[allow(unused)] // PSBT v2
+pub(crate) const PSBT_OUT_SCRIPT: u8 = 0x04;
 /// Type: Taproot Internal Key PSBT_OUT_TAP_INTERNAL_KEY = 0x05
 pub(crate) const PSBT_OUT_TAP_INTERNAL_KEY: u8 = 0x05;
 /// Type: Taproot Tree PSBT_OUT_TAP_TREE = 0x06