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-rw-r--r--docs/units-and-global-variables.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/units-and-global-variables.rst b/docs/units-and-global-variables.rst
index cc4d4446..1b58b1e8 100644
--- a/docs/units-and-global-variables.rst
+++ b/docs/units-and-global-variables.rst
@@ -58,8 +58,9 @@ Block and Transaction Properties
- ``block.gaslimit`` (``uint``): current block gaslimit
- ``block.number`` (``uint``): current block number
- ``block.timestamp`` (``uint``): current block timestamp as seconds since unix epoch
+- ``gasleft() returns (uint256)``: remaining gas
- ``msg.data`` (``bytes``): complete calldata
-- ``msg.gas`` (``uint``): remaining gas
+- ``msg.gas`` (``uint``): remaining gas - deprecated in version 0.4.21 and to be replaced by ``gasleft()``
- ``msg.sender`` (``address``): sender of the message (current call)
- ``msg.sig`` (``bytes4``): first four bytes of the calldata (i.e. function identifier)
- ``msg.value`` (``uint``): number of wei sent with the message