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src/beacon_root: gas optimization #21

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src/beacon_root: gas optimization #21

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19243e6
dropped `iszero`
lmittmann Sep 24, 2024
a575d85
dropped `stop`
lmittmann Sep 24, 2024
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13 changes: 4 additions & 9 deletions src/beacon_root/main.eas
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Original file line number Diff line number Diff line change
Expand Up @@ -72,11 +72,12 @@ loadtime:
calldataload ;; [input_timestamp]
dup1 ;; [input_timestamp, input_timestamp]

;; Verify input timestamp is non-zero.
iszero ;; [input_timestamp == 0, input_timestamp]
push1 @throw ;; [throw_lbl, input_timestamp == 0, input_timestamp]
;; Jump to continue if timestamp is non-zero, otherwise revert.
push1 @time_ok ;; [time_ok_lbl, input_timestamp, input_timestamp]
jumpi ;; [input_timestamp]
%do_revert() ;; []

time_ok:
;; Compute the timestamp index and load from storage.
push3 BUFLEN ;; [buflen, input_timestamp]
dup2 ;; [input_timestamp, buflen, input_timestamp]
Expand Down Expand Up @@ -108,10 +109,6 @@ loadroot:
push0 ;; [offset, size]
return ;; []

throw:
;; Reverts current execution with no return data.
%do_revert()

submit:
;; Calculate the index the timestamp should be stored at, e.g.
;; time_index = (time % buflen).
Expand All @@ -134,5 +131,3 @@ submit:
push3 BUFLEN ;; [buflen, time_index, root]
add ;; [root_index, root]
sstore ;; []

stop ;; []