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feat: eth_baseFee #795

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af98bea
feat(eth): add eth_baseFee method
wjmelements May 8, 2026
e04055c
test: update eth_simulateV1 snapshot after go-ethereum rebuild
wjmelements May 12, 2026
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14 changes: 14 additions & 0 deletions src/eth/fee_market.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,20 @@
result:
name: Gas price
value: '0x3e8'
- name: eth_baseFee
summary: Returns the base fee per gas in wei.
params: []
result:
name: Base fee
schema:
title: Base fee
$ref: '#/components/schemas/uint'
examples:
- name: eth_baseFee example
params: []
result:
name: Base fee
value: '0x3b9aca00'
- name: eth_blobBaseFee
summary: Returns the base fee per blob gas in wei.
params: []
Expand Down
3 changes: 3 additions & 0 deletions tests/eth_baseFee/get-current-basefee.io
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@@ -0,0 +1,3 @@
// gets the current base fee in wei
>> {"jsonrpc":"2.0","id":1,"method":"eth_baseFee"}
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@s1na s1na May 12, 2026

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need a pre-london testcase

<< {"jsonrpc":"2.0","id":1,"result":"0x4c9114a"}
2 changes: 1 addition & 1 deletion tests/eth_simulateV1/ethSimulate-empty-with-block-num-set-firstblock.io
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@@ -1,3 +1,3 @@
// set block number otherwise empty
>> {"jsonrpc":"2.0","id":1,"method":"eth_simulateV1","params":[{"blockStateCalls":[{}]},"0x1"]}
<< {"jsonrpc":"2.0","id":1,"result":[{"calls":[],"difficulty":"0x20000","extraData":"0x","gasLimit":"0x23f3e20","gasUsed":"0x0","hash":"0xd1c03d8586b7b759ee51a9705bf8459d4a02f83cce627426323f5c632dbcd0bd","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x0000000000000000","number":"0x2","parentHash":"0x79ba0368c2c6563a7d263695b583dcc6d1c25d4988daa0105804d38bdd987f2f","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x1fc","stateRoot":"0x283987661dff30976050c10b25ba46b4f8afc16da2cf67cd459d14a9ab43ec67","timestamp":"0x16","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","uncles":[]}]}
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<< {"jsonrpc":"2.0","id":1,"result":[{"calls":[],"difficulty":"0x20000","extraData":"0x","gasLimit":"0x23f3e20","gasUsed":"0x0","hash":"0x8fab69a5e4ecf73cd6c54a6677b2dd6916de84d6a188abb09145bb6bad7b1f05","logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","miner":"0x0000000000000000000000000000000000000000","mixHash":"0x0000000000000000000000000000000000000000000000000000000000000000","nonce":"0x0000000000000000","number":"0x2","parentHash":"0x79ba0368c2c6563a7d263695b583dcc6d1c25d4988daa0105804d38bdd987f2f","receiptsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","sha3Uncles":"0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347","size":"0x21f","stateRoot":"0x283987661dff30976050c10b25ba46b4f8afc16da2cf67cd459d14a9ab43ec67","timestamp":"0x16","transactions":[],"transactionsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","uncles":[],"withdrawals":[],"withdrawalsRoot":"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"}]}
5 changes: 4 additions & 1 deletion tools/go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ require (
github.com/emicklei/dot v1.6.2 // indirect
github.com/ethereum/c-kzg-4844/v2 v2.1.6 // indirect
github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab // indirect
github.com/ethereum/hid v1.0.1-0.20260421154323-c2ab8d9bf68a // indirect
github.com/fatih/color v1.16.0 // indirect
github.com/ferranbt/fastssz v0.1.4 // indirect
github.com/fsnotify/fsnotify v1.6.0 // indirect
Expand Down Expand Up @@ -75,7 +76,6 @@ require (
github.com/influxdata/influxdb1-client v0.0.0-20220302092344-a9ab5670611c // indirect
github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839 // indirect
github.com/jackpal/go-nat-pmp v1.0.2 // indirect
github.com/karalabe/hid v1.0.1-0.20260315100226-f5d04adeffeb // indirect
github.com/kilic/bls12-381 v0.1.0 // indirect
github.com/klauspost/compress v1.17.8 // indirect
github.com/klauspost/cpuid/v2 v2.0.9 // indirect
Expand Down Expand Up @@ -120,6 +120,7 @@ require (
go.opentelemetry.io/auto/sdk v1.2.1 // indirect
go.opentelemetry.io/otel v1.40.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.40.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0 // indirect
go.opentelemetry.io/otel/metric v1.40.0 // indirect
go.opentelemetry.io/otel/sdk v1.40.0 // indirect
Expand All @@ -139,3 +140,5 @@ require (
gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
)

replace github.com/ethereum/go-ethereum => ../../go-ethereum
Comment on lines +143 to +144
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@wjmelements wjmelements May 9, 2026

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I will remove this and rebuild after the go-ethereum change is merged

8 changes: 4 additions & 4 deletions tools/go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -80,8 +80,8 @@ github.com/ethereum/c-kzg-4844/v2 v2.1.6 h1:xQymkKCT5E2Jiaoqf3v4wsNgjZLY0lRSkZn2
github.com/ethereum/c-kzg-4844/v2 v2.1.6/go.mod h1:8HMkUZ5JRv4hpw/XUrYWSQNAUzhHMg2UDb/U+5m+XNw=
github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab h1:rvv6MJhy07IMfEKuARQ9TKojGqLVNxQajaXEp/BoqSk=
github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab/go.mod h1:IuLm4IsPipXKF7CW5Lzf68PIbZ5yl7FFd74l/E0o9A8=
github.com/ethereum/go-ethereum v1.17.3-0.20260413114535-ecae519972c0 h1:S9+NVTpdkUWUN5+Idxzg+gxo8d5AQe4C/O6pwFKPuNA=
github.com/ethereum/go-ethereum v1.17.3-0.20260413114535-ecae519972c0/go.mod h1:KHcRXfGOUfUmKg51IhQ0IowiqZ6PqZf08CMtk0g5K1o=
github.com/ethereum/hid v1.0.1-0.20260421154323-c2ab8d9bf68a h1:eIFUceK3U/z9UV0D/kAI6cxA27eH7MPqt2ks7fbzj/k=
github.com/ethereum/hid v1.0.1-0.20260421154323-c2ab8d9bf68a/go.mod h1:nABYy4hsKZpuN0mu0uybdjrIOuGb1eE7b1lci/ezUAo=
Comment on lines +83 to +84
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@bomanaps bomanaps May 9, 2026

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If geth pr is yet to be merged why this?

github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
github.com/ferranbt/fastssz v0.1.4 h1:OCDB+dYDEQDvAgtAGnTSidK1Pe2tW3nFV40XyMkTeDY=
Expand Down Expand Up @@ -174,8 +174,6 @@ github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839 h1:W9WBk7
github.com/influxdata/line-protocol v0.0.0-20200327222509-2487e7298839/go.mod h1:xaLFMmpvUxqXtVkUJfg9QmT88cDaCJ3ZKgdZ78oO8Qo=
github.com/jackpal/go-nat-pmp v1.0.2 h1:KzKSgb7qkJvOUTqYl9/Hg/me3pWgBmERKrTGD7BdWus=
github.com/jackpal/go-nat-pmp v1.0.2/go.mod h1:QPH045xvCAeXUZOxsnwmrtiCoxIr9eob+4orBN1SBKc=
github.com/karalabe/hid v1.0.1-0.20260315100226-f5d04adeffeb h1:Ag83At00qa4FLkcdMgrwHVSakqky/eZczOlxd4q336E=
github.com/karalabe/hid v1.0.1-0.20260315100226-f5d04adeffeb/go.mod h1:qk1sX/IBgppQNcGCRoj90u6EGC056EBoIc1oEjCWla8=
github.com/kilic/bls12-381 v0.1.0 h1:encrdjqKMEvabVQ7qYOKu1OvhqpK4s47wDYtNiPtlp4=
github.com/kilic/bls12-381 v0.1.0/go.mod h1:vDTTHJONJ6G+P2R74EhnyotQDTliQDnFEwhdmfzw1ig=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
Expand Down Expand Up @@ -340,6 +338,8 @@ go.opentelemetry.io/otel v1.40.0 h1:oA5YeOcpRTXq6NN7frwmwFR0Cn3RhTVZvXsP4duvCms=
go.opentelemetry.io/otel v1.40.0/go.mod h1:IMb+uXZUKkMXdPddhwAHm6UfOwJyh4ct1ybIlV14J0g=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 h1:QKdN8ly8zEMrByybbQgv8cWBcdAarwmIPZ6FThrWXJs=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0/go.mod h1:bTdK1nhqF76qiPoCCdyFIV+N/sRHYXYCTQc+3VCi3MI=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.40.0 h1:DvJDOPmSWQHWywQS6lKL+pb8s3gBLOZUtw4N+mavW1I=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.40.0/go.mod h1:EtekO9DEJb4/jRyN4v4Qjc2yA7AtfCBuz2FynRUWTXs=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0 h1:wVZXIWjQSeSmMoxF74LzAnpVQOAFDo3pPji9Y4SOFKc=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0/go.mod h1:khvBS2IggMFNwZK/6lEeHg/W57h/IX6J4URh57fuI40=
go.opentelemetry.io/otel/metric v1.40.0 h1:rcZe317KPftE2rstWIBitCdVp89A2HqjkxR3c11+p9g=
Expand Down
17 changes: 16 additions & 1 deletion tools/testgen/generators.go
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@ var AllMethods = []MethodTests{
DebugGetRawBlock,
DebugGetRawReceipts,
DebugGetRawTransaction,
EthBaseFee,
EthBlobBaseFee,
NetVersion,
TestingBuildBlockV1,
Expand Down Expand Up @@ -1838,6 +1839,21 @@ var EthMaxPriorityFeePerGas = MethodTests{
},
}

var EthBaseFee = MethodTests{
"eth_baseFee",
[]Test{
{
Name: "get-current-basefee",
About: "gets the current base fee in wei",
Run: func(ctx context.Context, t *T) error {
var result hexutil.Big
err := t.rpc.CallContext(ctx, &result, "eth_baseFee")
return err
},
},
},
}

var EthBlobBaseFee = MethodTests{
"eth_blobBaseFee",
[]Test{
Expand Down Expand Up @@ -6788,4 +6804,3 @@ var TxpoolContentFrom = MethodTests{
},
},
}